Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements:
(1) The isolation of the metal iron from its ores involves a series of high temperature reactions in which carbon monoxide is one of the reactants.
(2) Carbohydrates, fats, and proteins all contain the elements hydrogen, oxygen, and carbon.
(3) Substances whose molecules are both diatomic and heteroatomic must be heterogeneous mixtures.
A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

Question

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: 
(1) The isolation of the metal iron from its ores involves a series of high temperature reactions in which carbon monoxide is one of the reactants.
(2) Carbohydrates, fats, and proteins all contain the elements hydrogen, oxygen, and carbon.
(3) Substances whose molecules are both diatomic and heteroatomic must be heterogeneous mixtures.
A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

Quizplus · Accepted Answer

Statement 1 is true because the isolation of iron typically involves the use of carbon monoxide in a blast furnace, where it reacts with iron oxides to produce pure iron. Statement 2 is also true as carbohydrates, fats, and proteins indeed contain hydrogen, oxygen, and carbon as part of their molecular structure. Statement 3 is false because substances with diatomic (two atoms) and heteroatomic (atoms of different elements) molecules can be pure compounds, not necessarily heterogeneous mixtures; an example is carbon monoxide (CO), which is a pure compound, not a mixture.

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