Question: Fluorescent tubes and thermometer are made of?

• 1. Mercury
• 2. Hydrogen
• 3. Nitrogen
• 4. Oxygen

Question: Boiling of egg is a change which is:

• 1. Chemical
• 2. Physical
• 3. Both
• 4. None

Question: Aluminum composition on Earth.

• 1. 2.59%
• 2. 1.59%
• 3. 3.59%
• 4. None

Question: After persistent decay, radium would be finally changes into:

• 1. Steel
• 2. Brass
• 3. Lead
• 4. Hydrogen

Question: Permanent hardness of water cannot removed by:

• 1. Adding caustic soda
• 2. Distillation
• 3. Addind soda
• 4. Boiling

Question: Rusting of Iron involves __?

• 1. Reduction
• 2. Decomposition
• 3. Displacement
• 4. Oxidation

Question: Sodium by carbonate is used as:

• 1. Sodium
• 2. Backing soda
• 3. Sugar industry
• 4. None

Question: The capability of a soil mass of full width and depth to transmit water is known:

• 1. Porosity
• 2. Permeability
• 3. Transmissibility
• 4. None the above

Question: The initial setting time of Hydraulic Lime is:

• 1. 30 minutes
• 2. 60 minutes
• 3. 90 minutes
• 4. 120 minutes

Question: The oxidation state of Nitrogen in HNO3 is:

• 1. -5
• 2. -5
• 3. -6
• 4. +5