Which is the chief constituent of biogas?

Important Questions on Concerns About Our Environment

HARD

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 1

How the ozone layer protects the Earth?

MEDIUM

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 2

Name the gases which cause atmospheric pollution.

MEDIUM

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 3

Name the adverse effects of atmospheric pollution.

HARD

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 4

How does the greenhouse act as heat trap?

MEDIUM

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 5

What is meant by global warming? 

HARD

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 6

The calorific value of kerosene is $45000 \mathrm{kJ}/\mathrm{kg}$. What is its meaning?

MEDIUM

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 7

What is biogas?

HARD

10th West Bengal Board

IMPORTANT

PHYSICAL SCIENCE & ENVIRONMENT CLASS 10>Chapter 1 - Concerns About Our Environment>EXERCISE>Q 1

Explain the variation of temperature and pressure with altitude. Why the Mt. Everest remains covered with ice? Why the mountaineers use oxygen cylinders?