set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Tubelight is filled with

a) Argon gas at low pressure

b) Mercury vapour at low pressure

c) Sodium vapour

d) Both (a) and (b)

Question : 2

An element X has four electrons in its outermost orbit. What will be the formula of its compounds with hydrogen?

a) $XH_4$

b) $XH_3$

c) $X_4H$

d) $X_4H_4$

Question : 3

Which of the following do not consist carbon?

a) None of these

b) Diamond

c) Graphite

d) Coal