Particulate pollutants are the minute solid particles or liquid droplets in air.
a) Suggest two examples for non-viable particulate pollutants.

Particulate pollutants are the minute solid particles or liquid droplets in air. Write any two adverse effects of photo chemical smog.

Particulate matter in polluted air is removed by the application of electrostatic precipitator. Explain the working principle of electrostatic precipitator.

i. Hydrogen bonding is the cause for several peculiar properties of water in the liquid and solid states. What are those properties? ii. Water forms several types of hydrates with metal salts. Discuss any two of them with examples.

Radium disintegrates at an average rate of 2.24 xx 10^13 alpha -particles per minute. Each a-particle takes up two electrons from the air and becomes a neutral helium atom. After 420 days, helium gas collected was 0.5 rnL, measured at 27°C and 750 mmHg. Calculate the Avogadro constant.