Class 9 Chemistry MCQs - Chapter 3

Fundamentals of Chemistry Trivia Questions & Answers PDF Download - 4

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Fundamentals of Chemistry Test Questions and Answers PDF Download: MCQ 4

MCQ: 16

The smallest part of an element that cannot exist as a free state is

ion
charge
atom
molecule

MCQ: 17

A free radical has

unpaired electrons
paired electrons
no electrons
even number of electrons

MCQ: 18

Branch of chemistry dealing with the plantation and overcoming greenhouse effect is

Biochemistry
Organic chemistry
Environmental chemistry
Inorganic chemistry

MCQ: 19

1 mole of a substance refers to

molar mass
atomic mass
electron mass
neutron mass

MCQ: 20

The number of protons in the nucleus constitute it's

atomic mass
atomic number
nucleon number
number of neutrons

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