NDA 2017 Paper 2 | Chemistry Question 59 | General Science

NDA 2017 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Why is potassium permanganate used for purifying drinking water?

It kills germs

It dissolves the impurities

It is a reducing agent

It is an oxidising agent

NDA 2017 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

The principal use of hydrofluoric acid is

in etching glass

as a bleaching agent

as an extremely strong oxidising agent

in the preparation of strong organic fluorine compounds

NDA 2017 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

The species that has the same number of electrons as, $$_{17}^{35}$$Cl is

$$_{16}^{32}$$S

$$_{16}^{34}$$ S⁺

$$_{18}^{40}$$ Ar⁺

$$_{16}^{35}$$ S^2$$-$$

NDA 2017 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

The compound C₆H₁₂O₄ contains

22 atoms per mole

twice the mass percent of H as compared to the mass percent of C

six times the mass percent of C as compared to the mass percent of H

thrice the mass percent of H as compared to the mass percent of O

NDA Subjects

English

General Science

General Studies