(A) Li
(B) Na
(C) K
(D) Rb
Answer: (D) Rb
Category: Chemistry MCQs Class 9
Chemistry solved multiple choice questions (MCQs) for class 9 with answers.
Which of the following groups contain alkaline earth metals?
(A) IA
(B) IIA
(C) IIIA
(D) IVA
Answer: (B) IIA
Which isotope is used to irradiate cancer cells?
(A) Iodine-123
(B) Carbon-14
(C) Cobalt-60
(D) Iodine-131
Answer: (C) Cobalt-60
Number of neutrons in M is:
(A) 13
(B) 14
(C) 27
(D) 15
Answer: (B) 14
Which term is same for one mole of oxygen gas and one mole of water?
(A) Volume
(B) Mass
(C) Atoms
(D) Molecules
Answer: (D) Molecules