Chemistry - Mock Test 22

Question 211

Hair contains keratin proteins which are also present in nails and wool is an example of ?

A) Biochemistry B) Inorganic chemistry C) Physical chemistry D) none of above

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Question 212

Empirical formula for water is ?

A) CO2 B) HO C) H2 D) H2O

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Question 213

Free radicals are electrically ?

A) positively charged B) negatively charged C) can be both A and B D) neutral

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Question 214

A mixture that consists of different components is called ?

A) homogeneous mixture B) heterogeneous mixture C) mixture D) none of above

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Question 215

Element reduced in following reaction 2Ca + O2 2CaO is ?

A) a B) O2 C) CaO D) none of above

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Question 216

Rusting of iron occurs due to ?

A) reduction B) hydrogenation C) oxidation D) sublimation

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Question 217

A concentrated aqueous solution of sodium chloride is called ?

A) aqueous solution B) salt solution C) brine D) lemonade

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Question 218

Electrolytes convert electricity in ?

A) solid state B) liquid state C) gaseous state D) plasma state

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Question 219

In thermal power stations carbon atoms undergo oxidation to form ?

A) CO2 B) CO C) H2O D) O2

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Question 220

Electrodes used in production of sodium metal are ?

A) iron cathode and graphite anode B) sodium cathode and carbon anode C) aluminum cathode and fluoride anode D) none of above

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