set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Kerosene is a mixture of

a) saturated hydrocarbons

b) aromatic hydrocarbons

c) aliphatic hydrocarbons

d) alicyclic hydrocarbons

Question : 2

Vermicompost is an/a

a) organic bio fertilizer

b) inorganic fertilizer

c) toxic substance

d) synthetic fertilizer

Question : 3

Which of the following is considered to be a pure substance?

a) Muddy water

b) Sodium chloride

c) Granite

d) Milk of magnesia

Question : 4

Two substances A and B when brought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. The substance C is

a) a mixture

b) an element

c) a compound

d) none of these.

Question : 5

What is the weight of one atom of Hydrogen in grams?

a) $6.62 × 10^{–24}$

b) $6.023 × 10^{–23}$

c) $1.66 × 10^{–24}$

d) None of these

Question : 6

The atomic weights are expressed in terms of atomic mass unit. Which one of the following is used as a standard?

a) $^16O_8$

b) $^1H_1$

c) $^12C_6$

d) $^35Cl_17$