The burning of candle is an example of
spontaneous combustion
rapid combustion
slow oxidation
explosion
C.
slow oxidation
Which of the following is not used for putting out fires from electrical gadgets ?
sand
water
foam
carbon dioxide
B.
water
Which of the following causes acid rain ?
carbon dioxide
sulphur dioxide
carbon monoxide
oxides of sulphur and nitrogen
D.
oxides of sulphur and nitrogen
The calorific value of fuel is expressed in
joule
kJ/kg
kJ
none of the above
B.
kJ/kg