Chemistry - Comprehensive Mock Test 17

Question 161 Easy

Biochemistry deals with ?

A) physical changes in humans B) chemical changes in humans C) A and B both D) physical and chemical changes in living organisms

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Question 162 Easy

Ca on loosing 2 electrons becomes ?

A) Ca-2 B) Ca-1 C) Ca+2 D) Ca-2

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Question 163 Medium

If 9.05 moles of ozone is formed in a storm then mass of ozone is ?

A) 435g B) 450g C) 434.4g D) 480g

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Question 164 Medium

Natural force that holds together elements together is called ?

A) chemical bond B) force of attraction C) gravitational force D) physical bond

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Question 165 Medium

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 166 Easy

Empirical formula for water is ?

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

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Question 167 Easy

Free radicals are electrically ?

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

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Question 168 Medium

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 169 Medium

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

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

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Question 170 Easy

Rusting of iron occurs due to ?

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

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