76.  Charcoal is used in water treatment as a/an-

Answer & Explanation
Adsorbent

77.  Water gas is a Mixture of-

Answer & Explanation
Carbon monoxide and Hydrogen

78.  What is the chemical composition of Heavy Water?

Answer & Explanation
D2O

79.  Heating of ore in the absence of air below its melting point is called

Answer & Explanation
Calcinations

80.  Water can be separated from the mixture of water-Alcohol by the process-

Answer & Explanation
Distillation

81.  Iron and Manganese are removed by the process of-

Answer & Explanation
Filtration

82.  Enzyme which coagulate the milk into curd-

Answer & Explanation
Renin

83.  Which gas is used for converting vegetable oils into saturated fats -

Answer & Explanation
H2 (Hydrogen)

84.  Gas used as a fire extinguisher is

Answer & Explanation
Carbon dioxide (CO2)

85.  Chemically Lime water is -

Answer & Explanation
Calcium Hydroxide

86.  Highly polluting industries comes under the category of-

Answer & Explanation
Red

87.  Process of Removal of calcium and Magnesium is known as -

Answer & Explanation
Water softening

88.  When Hydrogen combusts in air, then formed-

Answer & Explanation
Water (H20)

89.  Phenolics as Pollutant can be removed from waste water by use of-

Answer & Explanation
Ion exchange method

90.  A Liquid is said to be boiled when its-

Answer & Explanation
Vapor pressure is equal to the surrounding pressure
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