MEDIUM
7th CBSE
IMPORTANT
Earn 100

Describe the chemical reaction of CO2 with metals like sodium, potassium and calcium.

Important Questions on Air and Oxygen

MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 88
Describe the chemical reaction of CO2 with non-metals like carbon.
HARD
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 89
Write a short note on the following layers of atmosphere: Troposphere.
HARD
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 89
Write a short note on the following layers of atmosphere: Stratosphere.
EASY
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 90
What is air pollution?
MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 90
Define Ozone depletion.
EASY
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 90
Write a brief note on carbon monoxide poisoning.
HARD
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 91

Fill in the blanks given in the following table.

Impurities Substances used for removal
(a) AsH3, PH3 _____
(b) _____ Lead nitrate solution
(c) _____ Caustic potash
(d) H2O (Water vapour) _____

Name the pollutants responsible for the following effects:

(a) Reduction in intake of oxygen.

(b) Cause of acid rain.

(c) Greenhouse effect.

(d) Formation of smog.

(e) Depletion of ozone layer.

(f) Problems of digestion.

(g) Contamination of groundwater.

(h) Respiratory disorders.

MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 4 - Air and Oxygen>PRACTICE QUESTIONS (CLASSROOM WING)>Q 93
One molecule each of 'X' and oxygen react to form 'Y' which further reacts with one molecule of water to give 'Z'. The number of electrons present in the dinegative ion of 'X' is equal to atomic the number of Argon. Identify X, Y and Z. How does 'Y' contribute to acid rain? Justify.