NTPC CBT-2 Chemistry Quiz

Question 1:

Which one of the following statements about glass is not correct ?

Glass is often said to be a supercooled liquid.

Glass has no definite melting point.

Soda glass is harder than pyrex glass.

Boron is present in pyrex glass.

Question 2:

Which one of the following compounds does not exhibit a different oxidation number of the same element?

Pb₃O₄

Fe₃O₄

Fe₂O₃

Mn₃O₄

Question 3:

A sample of 'soft soap' contains-

Caesium

Potassium

Calcium

Magnesium

Question 4:

Soaps are _____________ based soapy detergents.

distilled water

kerosene

oil

acid

Question 5:

For hard soaps , which of the following solution is used in the saponification of fats or oils?

KOH

NaOH

HCl

NaCl

Question 6:

Which of the following statement is incorrect about cement?

Raw materials used for the manufacture of clay are limestone and clay.

Excess of silica decrease the setting time of cement.

Alumina decreases the setting time of cement.

Clay provides silica oxide , alumina oxide and ferric oxide.

Question 7:

Bleaching powder is added to the water

To remove the suspended impurities

To remove the large quantity of salt

To make it free from all harmful micro-organisms

To make it odourless

Question 8:

Which of the following is the source of radioactive pollution?

Pollution created from fuels used in atomic reactors.

Pollution created from discharge of untreated domestic sewage into rivers

Pollution created from incomplete combustion of fuels

Pollution created from fertilizers and chemical industries

Question 9:

Match the following-

A-III,B-I,C-IV,D-II

A-I,B-III,C-II,D-IV

A-III,B-II,C-I,D-IV

A-III,B-I,C-II,D-IV

Question 10:

Which of the following pollutant has a strong smell of rotten egg?

Carbon monoxide

Sulphur dioxide

Hydrogen sulphide

Nitrogen oxides

NTPC CBT-2 Chemistry Quiz - 61

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NTPC CBT-2 Chemistry Quiz - 61

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