(A) Pig iron
(B) Cast iron
(C) Wrought iron
(D) Steel
Which variety of coal contains recognizable traces of the original plant material?
(A) Lignite
(B) Peat
(C) Bitumen
(D) Anthracite
Which of the following is the petroleum wax?
(A) Camauba wax
(B) Bees wax
(C) Paraffin wax
(D) Jojoba wax
Cloud is a colloidal dispersion of?
(A) Air in a dispersion medium of water
(B) Fog in a dispersion medium of water
(C) Mist in a dispersion medium of air
(D) Water drops in a dispersion medium of air
which of the following is the main nitrogenous waste in humans?
(A) Urea
(B) Uric Acid
(C) Ammonium Nitrate
(D) Ammonia
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere?
(A) Carbon dioxide
(B) Nitrous oxide
(C) Sulphur dioxide
(D) Chlorofluorocarbon
The polymerisation of which of the following is used in manufacturing of polythene in industry?
(A) Styrene
(B) Methie
(C) Acetylene
(D) Ethylene
Milk tastes sour when it is left in open for some time. This happen due to the formation of?
(A) Citric acid
(B) Lactic acid
(C) Acetic acid
(D) Carbonic acid