Class 9 Chemistry MCQs - Chapter 5

Physical States of Matter Trivia Questions and Answers PDF - 4

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Physical States of Matter Questions & Answers PDF Download: MCQ Quiz 4

MCQ 16: Solids whose atoms arrange themselves in different forms are

isotopes
crystals
allotropes
amorphous

MCQ 17: The process in which the vapor molecules are recaptured by the molecules at the liquid surface is called

evaporation
sublimation
condensation
boiling

MCQ 18: 1 atmospheric pressure is equal to

100.345 Pa
760 kPa
101.325 kPa
1.01325 mmHg

MCQ 19: A gas that shields living things on the surface of the earth from harmful UV radiation is

N₂
SO₂
O₂
O₃

MCQ 20: In graphite, the carbon atoms are arranged in layers of

pentagonal arrays
heptagonal arrays
octagonal arrays
hexagonal arrays

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