Chemistry Class-11: Chapter –1. Some Basic Concepts of Chemistry – Part-3

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II. Multiple Choice Questions (Type-II)

In the following questions two or more options may be correct.

Question-16:

One mole of oxygen gas at STP is equal to _______.

(i)

(ii)

(iii)

(iv)

Answer: (i, iv)

Question-17:

Sulphuric acid reacts with sodium hydroxide as follows:

When of sulphuric acid solution is allowed to react with of sodium hydroxide solution, the amount of sodium sulphate formed and its molarity in the solution obtained is

(i)

(ii)

(iii)

(iv)

Answer: (ii, iii)

Question-18:

Which of the following pairs have the same number of atoms?

(i)

(ii)

(iii)

(iv)

Answer: (iii, iv)

Question-19:

Which of the following solutions have the same concentration?

(i) of solution

(ii) of solution

(iii) of solution

(iv) of solution

Answer: (i, ii)

Question-20:

of oxygen has same number of molecules as in

(i)

(ii)

(iii)

(iv)

Answer: (iii, iv)

Question-21:

Which of the following terms are unitless?

(i) Molality

(ii) Molarity

(iii) Mole fraction

(iv) Mass percent

Answer: (iii, iv)

Question-22:

One of the statements of Dalton’s atomic theory is given below:

“Compounds are formed when atoms of different elements combine in a fixed ratio”

Which of the following laws is not related to this statement?

(i) Law of conservation of mass

(ii) Law of definite proportions

(iii) Law of multiple proportions

(iv) Avogadro law

Answer: (i, iv)

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