Latest Chemistry General Knowledge(GK) Questions and answers

1 .

The luster of a metal is due to

its high density

its high polishing

its chemical inertness

presence of free electrons

Correct Answer : presence of free electrons

2 .

The iron ore magnetite consists of

Fe₂O₃

Fe₃OH₄

FeCO₃

3Fe₂O₃ .. 3H₂O

Correct Answer :

3 .

The monomer of polythene is

vinyl chloride

ethylene

ethyl alcohol

None of the above

Correct Answer : ethylene

4 .

The high reactivity of fluorine is due to

its high electro negativity

small size of fluorine atom

availability of d-orbitals

strong F - F bond

Correct Answer : its high electro negativity

5 .

The main use of salt in the diet is to

make the taste of food better

produce in small amounts the hydrochloric acid required for the digestion of food

ease the process of cooking

increase the solubility of food particles in water

Correct Answer : produce in small amounts the hydrochloric acid required for the digestion of food

6 .

What are the number of moles of CO2 which contains 16 g of oxygen?

0.5 mole

0.2 mole

0.4 mole

0.25 mole

Correct Answer : 0.5 mole

7 .

The heat energy produced when the human body metabolises 1 gram of fat is

30 KJ

1 KJ

39 KJ

29 KJ

Correct Answer : 39 KJ

8 .

The hardest form of carbon is

coke

graphite

charcoal

diamond

Correct Answer : diamond

9 .

The inherited traits of an organism are controlled by

RNA molecules

nucleotides

DNA molecules

enzymes

Correct Answer : DNA molecules

10 .

The main active constituent of tea and coffee is

nicotine

chlorophyll

caffeine

aspirin

Correct Answer : caffeine

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Chemistry - General Knowledge Questions