Subject Experts Solutions for Chapter: Air and Oxygen, Exercise 1: PRACTICE QUESTIONS (CLASSROOM WING)

Explain the significance of nitrogen, oxygen and water vapour present in the atmosphere.

Describe the chemical reaction of ${\mathrm{CO}}_2$ with lime water.

Describe the chemical reaction of ${\mathrm{CO}}_2$ with metals like sodium, potassium and calcium.

Describe the chemical reaction of ${\mathrm{CO}}_2$ with non-metals like carbon.

Write a short note on the following layers of atmosphere: Troposphere.

Write a short note on the following layers of atmosphere: Stratosphere.

Fill in the blanks given in the following table.

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.

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.