Q. Petroleum is found in
1) Igneous rock
2) Sedimentary rocks
3) Metamorphic rocks
4) Marshy land
Q. Permanent hardness of water is due to the presence of
1) Calcium bicarbonate
2) Magnesium bicarbonate
3) Calcium sulphate
4) Sodium bicarbonate
Q. Passing a battery current through a solution of brine will produce
1) Sodium hydroxide and chlorine
2) Chlorine and sodium
3) Sodium hydroxide and oxygen
4) Chlorine and hydrogen
Q. Paraffin wax used for making candles is obtained from
1) Coal
2) Petroleum
3) Seaweeds
4) Marsh gas
Q. Ozone is
1) Paramagnetic
2) Diamagnetic
3) Ferromagnetic
4) Non-magnetic
Q. Of the following radiations, the one most easily stopped by air is composed of
1) alpha rays
2) beta rays
3) gamma rays
4) x-rays
Q. Of the following particles, the particles having the least mass is
1) meson
2) neutron
3) electron
4) proton
Q. Of all the gases present in the air, Which one of the following is the highest in the Percentage?
1) Carbon dioxide
2) Hydrogen
3) Oxygen
4) Nitrogen
Q. Nuclear fusion is a
1) chain reaction
2) exogeneric reaction
3) endogeneric reaction
4) thermal reaction
Q. Mordants are substances that
1) fix colors on fabrics
2) have a bleaching action
3) have a capacity of increasing the intensity of colors
4) are very hard solids
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