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JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

1 Medium

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Analyzing +4 | -1

Which of the following statements about the advantage of roasting sulphide ore before reduction is true?

a. The

\Delta_{{f}} {G}^{\mathrm{o}}

of the sulphide is greater than that for

{CS}_2

and

{H}_2 {S}

b. The

\Delta {G}

is negative for roasting sulphide ore to oxide.

c. Roasting sulphide to oxide is thermodynamically feasible

d. Carbon and hydrogen are suitable reducing agents for metal sulphides

View answer and explanation

Correct option: B

a, b, and c

The correct answer is a, b, and c. Roasting sulphide ores is advantageous because the change in Gibbs free energy is negative, making it thermodynamically feasible, and the Gibbs free energy of formation of the sulphide is greater than that of CS2 and H2S. Carbon and hydrogen are not suitable reducing agents for metal sulphides.

JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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