(A) 2s, 2p
(B) 1s, 2s, 2p
(C) 3s, 3p, 3d
(D) 1s, 2s, 3s
Answer: (C) 3s, 3p, 3d
Category: Chemistry MCQs Class 9
Chemistry solved multiple choice questions (MCQs) for class 9 with answers.
What is the mass of FOUR moles of Hydrogen (H2) gas?
(A) 1g
(B) 10g
(C) 8.064 g
(D) 2.016 g
Answer: (C) 8.064 g
Consider the following reaction CuO + H2—–> Cu + H2O in this reaction CuO behaves as:
(A) Electrolyte
(B) Catalyst
(C) Oxidizing agent
(D) Reducing agent
Answer: (C) Oxidizing agent
Galvanizing is:
(A) Coating with Cr
(B) Coating with Cu
(C) Coating with Zn
(D) Coating with Sn
Answer: (C) Coating with Zn
The oxidation state of B in H3BO3 is:
(A) +2
(B) +4
(C) +3
(D) +5
Answer: (C) +3