(A) Power alcohol
(B) Rectified spirit
(C) Denatured spirit
(D) Methylated alcohol
Detergents clean surfaces on the principle of?
(A) Floatation
(B) Elasticity
(C) Viscosity
(D) Surface tension
Sea water can be purified by the process of?
(A) Filtration
(B) Evaporation
(C) Distillation
(D) Fractional distillation
Alum is used as?
(A) A purifier for water
(B) An analgesic
(C) A fertilizer
(D) A disinfectant
Gun powder consist of a mixture of?
(A) Nitre, Sulphur and Charcoal
(B) TNT and Charcoal
(C) Sand and TNT
(D) Sulphur, Sand and Charcoal
Gas which turns into liquid at the lowest temperature among the following is?
(A) Nitrogen
(B) Helium
(C) Oxygen
(D) Hydrogen
Ruby and sapphire are oxides of?
(A) Aluminium
(B) Tin
(C) Iron
(D) Copper
Gas used in the artificial ripening of fruits is?
(A) Butane
(B) Ethane
(C) Methane
(D) Acetylene