Q21Multiple choice
Which of the following are peroxoacids of sulphur?
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Correct option: A
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Worked solution
Option (i) is the answer.
NCERT Exemplar · Class 12 · Chemistry
Chapter 7: The P-Block Elements
Practice each question, then open the answer or worked solution.
I. Multiple Choice Questions (Type-I)
27 questionsQ22Multiple choice
Hot conc. H2SO4 acts as a moderately strong oxidising agent. It oxidises both metals and nonmetals. Which of the following element is oxidised by conc H2SO4 into two gaseous products?
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Correct option: C
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Option (iii) is the answer.
Q23Multiple choice
A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When an excess of this gas reacts with NH3 an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from _________.
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Correct option: A
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Option (i) is the answer.
Q24Multiple choice
In the preparation of compounds of Xe, Bartlett had taken O2+Pt F6– as a base compound. This is because
Option (iii) is the answer.
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Solution coming soon.
Q25Multiple choice
In solid state PCl5 is a _________.
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Correct option: D
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Option (iv) is the answer.
Q26Multiple choice
Reduction potentials of some ions are given below. Arrange them in decreasing
order of oxidising power.
| Ion
Reduction potential Eᶱ/V |
ClO4–
Eᶱ = 1.19V |
IO4–
Eᶱ = 1.65V |
BrO4 –
Eᶱ = 1.74V |
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Correct option: C
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Worked solution
Option (iii) is the answer.
Q27Multiple choice
Which of the following is isoelectronic pair?
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Correct option: B
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Option (ii) is the answer.