Which of the following gases cause acid rain?
I. Ammonia
II. Hydrogen
III. Oxides of Nitrogen
IV. Sulphur dioxide
I and II only
II and IV only
III and IV only
All of these
Which is a fuel?
Wood
Carbon monoxide
Nitrogen
Oxygen
Select the quality that a good fuel should possess.
A high calorific value
A low calorific value
It should burn too fast
It should burn too slow
Bio gas is a secondary fuel obtained from .
Coal
Animal dung
Petrol
Burning of coal and diesel releases _____________ gas
Hydrogen
Sulfur dioxide
Carbon
Hydrogen peroxide
A burning candle when placed in an enclosed jar immediately gets extinguished. This is because
The supply of CO2 is cut off
The supply of O2 is cut off
The supply of N2 is cut off
Both b &c
Water cannot be used as fire extinguisher to put out:
burning wood
burning oil
burning cloth
burning charcoal
Which of the following is used to extinguish fire caused due to electrical short circuit?
Water
Soda-acid fire extinguisher
Carbon dioxide
Sand
Select the incorrect statement.
Insufficient supply of oxygen results in complete combustion.
In sufficient supply of oxygen results in incomplete combustion.
Sufficient supply of oxygen results in complete combustion.
Both b & c
Which of the following has the characteristics of a good fuel?
Coke
Butane
Kerosene
