KVS SCIENCE QUIZ 14 (CARBON AND ITS COMPOUND)

Question 1:

What is the total number of covalent bonds in methanol?

3

4

5

6

Question 2:

Which one of the following is the hardest natural substance ?

1) Diamond

2) Graphite

Only 1

Only 2

Both 1 and 2

neither 1 nor 2

Question 3:

Which one of the following statements about the cleansing action of soap is not true ?

The oil and dirt get collected in the centre of the micelle.

soap micelles scatter light.

soaps are ammonium salt of long chain of carboxylic acid.

soap form insoluble precipitate with calcium magnesium ions in hard water.

Question 4:

Hydrogenation of vegetable oils using nickel catalyst is an example of

Substitution reaction

Elimination reaction

Addition reaction

Free radical polymerization

Question 5:

NaCl is a ionic compound because

It is formed by sharing of electrons

It is formed by transfer of electrons

Both 1 and 2

None of these

Question 6:

Which of the following is added in ethanol in industries to make it unfit for drinking?

Methanol , Pyridine , Copper Sulphate

Propanol , Copper Sulphate

Methanol , Pyridine , Sodium Sulphate

Methanol , Pyridine , Barium Sulphate

Question 7:

Which of the following is used as a lubricant for the fast moving parts of machinery?

Diamond

Graphite

Both 1 and 2

None of these

Question 8:

Which of the following is used for ripening raw fruits ?

Ethylene

Propene

Butene

Pentene

Question 9:

Which of the following gases is used in cigarette lighters ?

Propane

Butane

Radon

Methane

Question 10:

Which of the following has the maximum number of compounds ?

Hydrogen

Carbon

Nitrogen

Chlorine

KVS SCIENCE QUIZ 14 (CARBON AND ITS COMPOUND)

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