Silica is used in _____.

1. 1. Plastic making
   2. Glass making
   3. Iron making
   4. Wood making

The gases which are used by divers as an artificial atmosphere are helium and _____.

1. 1. Oxygen
   2. Nitrogen
   3. Neon
   4. Carbon monoxide

Nitrogen occurs in plants and animals in the form of _____.

1. 1. Carbohydrate
   2. Minerals
   3. Fats
   4. Proteins

One gram of carbohydrates give energy of the amount _____.

1. 1. 3 K Calories
   2. 6.3 K Calories
   3. 4.1 K Calories
   4. 7.0 K Calories

A man can survive without food for at least _____.

1. 1. two months
   2. three months
   3. one month
   4. four months

All forms of energy that we use are ultimately transmitted into _____.

1. 1. Heat energy
   2. Electrical energy
   3. Light energy
   4. Chemical energy

In which country alcohol is used as fuel for vehicles?

1. 1. Japan
   2. Brazil
   3. Germany
   4. USA

The device used for the measurement of current, voltage and resistance is _____.

1. 1. AVO meter
   2. Ammeter
   3. Ohmmeter
   4. Galvanometer

All the following contribute to pollution except _____.

1. 1. Thermal power plants
   2. Nuclear power plants
   3. Hydroelectric power project
   4. Automobiles

Speed of sound is greater in solids than in liquids because _____.

1. 1. The atoms in solids are regularly arranged
   2. The atoms in liquids are closely packed
   3. The liquids have high elasticity
   4. The solids have high elasticity