CBSE - Sources of Energy

1 Sources of Energy 

Read the given statements and mark the correct option.

Statement I : Fossil fuels are non­renewable sources of energy.
Statement II : Excessive use of fossil fuels causes pollution and leads to global warming.

(1) Both statements I & II are true and statement II i s the correct explanation of statement I.
(2) Both statements I & II are true but statement II i s not the correct explanation of statement I.
(3) Statement I i s true but statement II is false.
(4) Statement I i s fal se but statement II is true.

2 Sources of Energy 

Energy released in the fission of 1 kg of U-235 is equivalent to energy obtained from burning of coal weighing

(1) 25 ton
(2) 250 ton
(3) 2500 ton
(4) 25000 ton

3 Sources of Energy 

The purpose of the glass cover on top of a box-type solar cooker is to

(1) Allow one to see the food being cooked
(2) Allow more sunlight into the box
(3) Prevent dust from entering the box
(4) Reduce heat loss by radiation

4 Sources of Energy 

The main constituent of CNG is

(1) butane
(2) methane
(3) ethane
(4) propane

5 Sources of Energy 

To produce bio-gas in a bio-gas plant, we need

(1) Air but not water
(2) Water but not air
(3) Air and water
(4) Neither air nor water

6 Sources of Energy 

Gasoline is produced by refining which fossil fuel?

(1) Natural gas
(2) Coal
(3) Petroleum
(4) Propane

7 Sources of Energy 

Example of fossil energy is :
 
 (1)  Alcohol  
 (2)  Hydrogen   
 (3) Petrol  
 (4) Gobar gas

8 Sources of Energy 

What is the range of wavelength of U.V. rays?

(1)  132 to 200 nm
(2)  310 to 400 nm
(3)  310 to 200 nm
(4)  300 to 200 nm