Questões de Concurso Público INT 2024 para Tecnologista Pleno - Química

Foram encontradas 51 questões

Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467198 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
In the sentence, “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached”, the word in bold type cannot be substituted for
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467199 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
Choose the alternative that better substitutes the underlined preposition in “On Saturday, X’s global government affairs team posted that it had been ‘forced by court decisions to block certain popular accounts in Brazil’ and threatened with ‘daily fines’ for noncompliance”. 
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467200 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
From the sentence “Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States”, it is possible to say that
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467201 Inglês
04.08.2024


‘We have reached the limit.’ Clash with Elon Musk prompts calls for social media controls in Brazil


London (CNN) — Brazil’s attorney general has called for social media platforms in the country to be regulated after Elon Musk threatened to disobey a court order banning certain accounts on X and lashed out against “aggressive censorship.”


In a post on X Sunday, Attorney General Jorge Messias wrote: “It is urgent to regulate social networks. We cannot live in a society in which billionaires domiciled abroad have control of social networks and put themselves in a position to violate the rule of law, failing to comply with court orders and threatening our authorities.”


In a statement, Brazil’s Supreme Court described Musk’s defiance as a “flagrant” obstruction of justice and said he should be investigated by the police. Supreme Court Justice Alexandre de Moraes announced Sunday that he would open an inquiry into the billionaire businessman who owns X.


The standoff is the latest clash between authorities around the world and Musk – a self-declared “free speech absolutist” who has relaxed X’s content moderation policies and reinstated a number of previously blocked accounts after buying the company, formerly known as Twitter, in 2022.


Orlando Silva, a Brazilian lawmaker aligned with the country’s leftwing government, said he would propose a “responsibilities regime for these digital platforms.” “We have reached the limit!” he posted on X, adding that Musk had disrespected the judiciary. On Saturday, X’s global government affairs team posted that it had been “forced by court decisions to block certain popular accounts in Brazil” and threatened with “daily fines” for non-compliance. “We do not know which posts are alleged to violate the law. We are prohibited from saying which court or judge issued the order, or on what grounds,” they wrote. They do not believe the orders are constitutional and will challenge them legally where possible, they added.


The Supreme Court had ordered that the accounts be blocked as part of its ongoing investigation into “digital militias,” which, among other things, is looking into the spread of misinformation and incitement of crime under the government of former far-right President Jair Bolsonaro.


Social media platforms have been widely viewed as a catalyst for riots in Brazil that took place on January 8 last year, when hundreds of protesters broke into federal government buildings in the capital Brasilia, in scenes reminiscent of the January 6, 2021, insurrection in the United States.


Musk suggested that Moraes was behind the ban, writing Sunday on X that the judge had “brazenly and repeatedly betrayed the constitution and people of Brazil. He should resign or be impeached.”


In a separate post Saturday, he called the court’s decision to block the accounts “aggressive censorship” that “appears to violate the law and will of the people of Brazil.” He said X would defy the court’s order and lift all restrictions.


“As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit,” he noted.


X has faced criticism for accommodating government censorship demands in the past, with Musk saying the company has no choice but to comply. For example, it blocked some X accounts in Turkey at the behest of the government ahead of the country’s elections last year, while at the same time contesting the orders in court.



(Internet: < https://edition.cnn.com/2024/04/08/tech/elon-musk-brazilinvestigation/index.html> )
In “As a result, we will probably lose all revenue in Brazil and have to shut down our office there. But principles matter more than profit”, it is not possible to say that Musk
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467202 Inglês
Choose the best alternative: “People have changed to virtual political protests, _____?” 
Alternativas
Ano: 2024 Banca: Instituto Access Órgão: INT Provas: Instituto Access - 2024 - INT - Pesquisador - Catálise | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia de Manutenção | Instituto Access - 2024 - INT - Tecnologista Júnior - Engenharia e Segurança do Trabalho | Instituto Access - 2024 - INT - Tecnologista Júnior - Gestão de Qualidade | Instituto Access - 2024 - INT - Tecnologista Pleno - Avaliação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocatálise | Instituto Access - 2024 - INT - Tecnologista Pleno - Biocorrosão e Biodegradação | Instituto Access - 2024 - INT - Tecnologista Pleno - Certificação de Produtos | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão e Proteção | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Sob Tensão | Instituto Access - 2024 - INT - Tecnologista Pleno - Corrosão Pelo H2s e Co2 | Instituto Access - 2024 - INT - Tecnologista Pleno - Engenharia de Materiais e Simulação Computacional | Instituto Access - 2024 - INT - Tecnologista Pleno - Motores e Emissões | Instituto Access - 2024 - INT - Tecnologista Pleno - Planejamento Tecnológico | Instituto Access - 2024 - INT - Tecnologista Pleno - Química | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia de Materiais Poliméricos | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia da Informação e Comunicações | Instituto Access - 2024 - INT - Tecnologista Pleno - Tecnologia Química Industrial | Instituto Access - 2024 - INT - Tecnologista Pleno 1 - Engenharia de Avaliações | Instituto Access - 2024 - INT - Tecnologista Pleno 2 - Engenharia de Avaliações |
Q2467203 Inglês
Choose the best alternative: “Brazilians’ sense of belief in institutions _____ .”
Alternativas
Q2474258 Química
Detetores de ionização por chama (DIC) e por detetores por condutividade térmica (DCT) podem ser usados em cromatografia a gás (CG). Considerando-se a determinação de substâncias orgânicas e todas as características, assinale a alternativa correta.
Alternativas
Q2474259 Química
Uma substância hipoética AB2 tem fórmula molecular igual a 120 g mol-1. Uma solução aquosa é preparada dissolvendo-se 1,20 g desta substância em 100 mL de solução aquosa (solução A). Em seguida, uma alíquota de 5,00 mL dessa solução é diluída com água para um volume de 250 mL (solução B). As concentrações das soluções A e B, respectivamente, são
Alternativas
Q2474260 Química
Pesticidas, poluentes atmosféricos e um grande número de substâncias que ocorrem em baixas concentrações, podem contaminar alimentos e bebidas, inclusive a água. Para a determinação de interesse, as amostras devem ser homogeneizadas previamente à extração do(s) analito(s) de interesse e o extrato deve ser limpo (clean-up) e reconcentrado, antes da análise por um método instrumental. Uma amostra de água (100 mL) foi submetida a 4 etapas sequenciais de extração com hexano, que é menos denso que a água. Os extratos foram retirados da água, combinados e a solução resultante foi seca e reconcentrada a 1.00 mL. A concentração de benzo[a]pireno (BaP) foi determinada por cromatografia a líquido de alta eficiência com detecção por fluorescência, por comparação de áreas com um padrão conhecido contendo 100 μg L-1. Esse padrão, ao ser analisado, resultou em uma área de 12500. Nas mesmas condições, a análise do extrato de uma amostra de água potável apresentou uma área de 6500. Sabendo-se que a legislação admite como limite máximo de concentração um valor de 0,7 μg L-1 para água potável, pede-se estimar a concentração de BaP na amostra de água e verificar se ela atende ao critério de potabilidade para essa substância.
Alternativas
Q2474261 Química
Para a determinação de cromatografia de uma substância (X), o método do padrão interno foi usado. As soluções de amostra e padrão foram analisadas nas mesmas condições e continham a mesma concentração de padrão interno (0,100 μg L-1). Os dados abaixo foram obtidos. 

Imagem associada para resolução da questão


Assinale a alternativa que apresenta a concentração da substância X na amostra.
Alternativas
Q2474262 Química
Admita que a especificação de um dado produto seja umidade máxima = 1,00 % p/p. Para avaliar a umidade em amostras desse produto, alíquotas de 3 amostras pesando 25,00 g foram pesadas e aquecidas por 2 h na temperatura de 105 °C, em que os produtos são estáveis termicamente. Os pesos obtidos após o aquecimento foram 24,91 g (produto A), 24,19 g (produto B) e 23,56 (produto C). Com base nesses resultados, assinale a alternativa correta.
Alternativas
Q2474263 Química
A análise de alimentos é uma ferramenta importante para a garantia da qualidade e segurança dos alimentos. Para tal, pode-se recorrer a diversas metodologias analíticas de acordo com a finalidade da análise. Nesse contexto, os métodos analíticos utilizados nas análises bromatológicas são classificados, de forma genérica, em métodos convencionais e não-convencionais. Assinale a alternativa que corresponde a um método classificado como não convencional.
Alternativas
Q2474264 Química
Uma das demandas no controle de qualidade e embalagens de alimentos é a análise quantitativa do teor de sais minerais como o selênio, zinco, magnésio, potássio e sódio. Assinale a alternativa que corresponde ao método mais adequado.
Alternativas
Q2474265 Química
Um analista de laboratório, ao determinar o teor de açúcares redutores em uma amostra de biscoito doce, através do método de Fehling, chegou a um resultado de 4,34% de açucares redutores totais. Com base nesse resultado, assinale a alternativa que corresponde à quantidade de açucares redutores, em gramas, presentes em 150 gramas do biscoito doce analisado.
Alternativas
Q2474266 Química
O Detector de Ionização de Chama (DIC) é muito utilizado nos setores petroquímico, farmacêutico e de alimentos para analisar compostos orgânicos. Assinale a alternativa que corresponde à técnica analítica com o qual o DIC é frequentemente utilizado.
Alternativas
Q2474267 Química
Monossacarídeos são os carboidratos mais simples que representam a unidade fundamental formadora dos dissacarídeos e polissacarídeos. Assinale a alternativa que corresponde a monossacarídeos presentes em alimentos.
Alternativas
Q2474268 Química
Assinale a alternativa que corresponde ao método comumente utilizado para determinação do teor lipídeos em alimentos. 
Alternativas
Q2474269 Química
Método de análise de alimentos, conhecido por Kjeldahl, no qual a amostra do alimento é digerida em ácido sulfúrico. Assinale a alternativa que corresponde ao macronutriente analisado por essa técnica.
Alternativas
Q2474270 Química
O conteúdo de mineral fixo ou cinza de um alimento é o resíduo inorgânico que permanece após a queima da matéria orgânica, a qual é transformada em CO2, H2O e NO2. Os elementos minerais se apresentam na cinza sob a forma de óxidos, sulfatos, fosfatos, silicatos e cloretos, dependendo das condições de incineração e da composição do alimento. Assinale a alternativa correta com relação ao resíduo mineral fixo.
Alternativas
Q2474271 Química
Assinale a alternativa que corresponde à concentração molar de uma solução que contém 0,5 mol de soluto em 250 mL de solvente. 
Alternativas
Respostas
21: C
22: B
23: C
24: E
25: D
26: C
27: C
28: D
29: B
30: D
31: C
32: B
33: C
34: A
35: C
36: D
37: A
38: C
39: D
40: C