Class 10 Chemistry MCQs – Practice Test 6 (Chapter 6)

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MCQ 26: The lower layer of the thermosphere is:

ionosphere
exosphere
mesosphere
stratosphere

MCQ 27: Which of the following is true about nitrogen dioxide?

it is colorless
it is odourless
it is soluble in water
it is soluble in oxygen

MCQ 28: What is the term used for the envelope of gases and water vapor surrounding the planet earth?

air
atmosphere
environment
biome

MCQ 29: Which of the following has the lowest percentage in the air?

krypton
argon
hydrogen
helium

MCQ 30: Which of the following is responsible for the rise in temperature in the stratosphere?

position of stratosphere
height of stratosphere
ozone
sunlight

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