7000+ Chemistry MCQ Questions and Answers 2024 - 2025 Pdf - 2

Question: 6

Number of valence electrons in carbon is

(A) 2 electrons

(B) 4 electrons

(C) 8 electrons

(D) 16 electrons

Question: 7

Which resin commonly called as Thermocol?

(A) ABS

(B) Polycarbonate

(C) Polyvinyl Chloride

(D) Polystyrene

Question: 8

A phenomenon in which an element exists in different modification in same physical state is called

(A) Allotropy

(B) Catenation

(C) Crystallinity

(D) Isomerism

Question: 9

Atoms of different elements with the same number of electrons are called

(A) Isotones

(B) Isotopes

(C) Isobars

(D) Isomers

Question: 10

One Nanometre is

(A) 10^-6 metre

(B) 10^-7 metre

(C) 10^-8 metre

(D) 10^-9 metre