Air contains volume of carbon dioxide approximately _____.

1. 1. 3%
   2. 0.03%
   3. 33%
   4. 0.3%

For what reactions is water a universal solvent?

1. 1. Biochemical
   2. Chemical
   3. Physical
   4. Nuclear

The volume percentage of nitrogen in air is _____.

1. 1. 55%
   2. 68%
   3. 50%
   4. 78%

In the electricity meter, the digit to the extreme right is _____.

1. 1. 1/5th of the Unit
   2. 1/100th of the Unit
   3. 1/10th of the Unit
   4. 1/7th of the Unit

What is used in making of alloys?

1. 1. Gypsum
   2. Chromium
   3. Granite
   4. Limestone

The major part of natural gas, petroleum and coal consist of _____.

1. 1. Chlorine
   2. CFC
   3. Methane
   4. Carbon dioxide

Plutonium is used as _____.

1. 1. Fuel for nuclear fission
   2. Fuel for nuclear fusion
   3. Source of chemical energy
   4. Source of light energy

Which type of Uranium is used in the fission process?

1. 1. Uranium – 234
   2. Uranium – 235
   3. Uranium – 236
   4. Uranium – 237

The percentage of water in blood is _____.

1. 1. 70 per cent
   2. 85 per cent
   3. 90 per cent
   4. 95 per cent

The second most abundant metal found in the earth’s crust is _____.

1. 1. Iron
   2. Calcium
   3. Sodium
   4. Aluminium