Question: Which of the following is useful in the chemistry of photography?

• 1. Aluminium hydroxide
• 2. Silver bromide
• 3. Sodium chloride
• 4. Potassium nitrate

Question: The process by which metal surface is coated with thin layer of zinc is called:

• 1. Vulcanising
• 2. Electroplating
• 3. None of these
• 4. Galvanizing

Question: The substance generally used in the tip of safety match stick is:

• 1. Yellow phosphorus
• 2. Antimony trisulphide
• 3. Red phosphorus
• 4. Sodium

Question: Nuclear power reactors are operated at low temperatures and consequently with lower efficiency because:

• 1. High pressure inside the reactor reduces the temperature
• 2. Uranium is difficult to heat
• 3. The walls of nuclear reactors cannot withstand high temperature
• 4. none of these

Question: Arrange these fertilizers according to the decreasing order of their nitrogen content I. Ammonium Sulphate, II Ammonium Nitrate, III Potassium Nitrate, IV Urea:

• 1. IV, II, III, I
• 2. IV, II, I, III
• 3. IV, III, II, I
• 4. II, IV, III, I

Question: Radio carbon dating process is used to known the age of:

• 1. Plants
• 2. Rocks
• 3. Fossils
• 4. all of these

Question: The internal antenna of a transistor set is made of:

• 1. Copper
• 2. iron
• 3. Ferro-chrom
• 4. Alnico

Question: The dynamo converts?

• 1. Mechanical Energy into electrical energy
• 2. Mechanical Energy into magnetic energy
• 3. Electrical energy into Mechanical energy
• 4. None of these

Question: Which metal is commonly used as an electromagnet?

• 1. Nickel
• 2. Copper
• 3. Iron
• 4. None of these

Question: The raw material used for the manufacture of Glass and Cement is?

• 1. Limestone
• 2. Gypsum
• 3. Washing soda
• 4. None of these