91)For plant growth, the most important compounds are made up of
carbon sulphur
nitrogen sodium
Answer :

92)The compound obtained by heating a caustic soda solution with linseed oil can be used as a
fertiliser plastic
fuel soap
Answer :

93)The two gases used in the industrial preparation of sulphuric acid are
sulphur dioxide and oxygen sulphur dioxide and hydrogen
sulphur dioxide and chlorine carbon dioxide and oxygen
Answer :

94)The gases used in the manufacture of ammonia are
nitrogen and oxygen nitrogen and hydrogen
nitrogen and methane oxygen and nitric oxide
Answer :

95)The metal that occurs in the pure form in the earth's crust is
sodium copper
platinum magnesium
Answer :

96)Chloromycetin is
an antiseptic antidepressant
analgesic antibacterial
Answer :

97)In the industrial production of vegetable ghee, the process involved is
oxidation ionisation
reduction dissociation
Answer :

98)Chemically, cane sugar is
sucrose fructose
lactose glucose
Answer :

99)Oxidation is a process which involves
the gain of electrons the loss of electrons
the gain of hydrogen no change of electrons
Answer :

100)The number of isotopes in which hydrogen can exist are
1 3
4 2
Answer :

101)For respiration, deep-sea divers use a mixture of
hydrogen and oxygen oxygen and carbon dioxide
oxygen and nitrogen oxygen and helium
Answer :

102)The boiling point of water, on Kelvin scale of temperature is
100 273
373 263
Answer :

103)In the process of dialysis, used on patients with affected kidneys, the phenomenon inveoved is
diffusion osmosis
absorption electrophoresis
Answer :

104)Milk is an example of
gel suspension
foam emulsion
Answer :

105)Gunpowder consists of a mixture of
sulphur, sand and charcoal sand, TNT and potassium nitrate
TNT and charcoal potassium nitrate, sulphur and charcoal
Answer :

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