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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEC
Chapter: General Principles and Processes of Isolation of Metals

Olympiad workbook · NSEC · General Principles and Processes of Isolation of Metals

P, Q, R and S are four metals whose typical reactions are given...

P, Q, R

and

S

are four metals whose typical reactions are given below. (I) Only Q and R react with dilute HCl to give

\mathrm{H}_2

gas. (II) When Q is added to a solution containing the ions of the other metals, metallic

\mathrm{P}, \mathrm{R}

and S are formed. (III) P reacts with concentrated

\mathrm{HNO}_3

but S does not. The correct order of their reducing character is:

Options

A $\mathrm{S} < \mathrm{P} < \mathrm{R} < \mathrm{Q}$
B $\mathrm{S} < \mathrm{R} < \mathrm{P} < \mathrm{Q}$
C $\mathrm{R} < \mathrm{Q} < \mathrm{P} < \mathrm{S}$
D $\mathrm{Q} < \mathrm{P} < \mathrm{S} < \mathrm{R}$

Correct answer

A. $\mathrm{S} < \mathrm{P} < \mathrm{R} < \mathrm{Q}$

Step-by-step solution

No Solution

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