Chemistry MCQs

Question 1

An electric iron has a heating element made of :

Accepted Answer

Nichrome

Answer

Copper

Answer

Tungsten

Answer

Zinc

Question 2

The metal chiefly used for galvanising iron is :

Accepted Answer

Zinc

Answer

Mercury

Answer

Cadmium

Answer

Tin

Question 3

The anode in a dry cell consists of

Accepted Answer

Zinc

Answer

Copper

Answer

Cadmium

Answer

Graphite

Question 4

When a spoon is to be electroplated with nickel the spoon is

Accepted Answer

Made cathode and a pure nickel red, the anode

Answer

Dipped in a nickel sulphate solution

Answer

Made anode and a pure nickel rod, the cathode

Answer

Coated with nickel sulphate and dried

Question 5

Conversion of chemical energy into electrical energy occurs in

Accepted Answer

A battery

Answer

Atomic bombs

Answer

Dynamo

Answer

Electric heaters

Question 6

The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :

Accepted Answer

Galvanization

Answer

Zinc plating

Answer

Alloy formation

Answer

Vulcanization

Question 7

Galvanization of iron is carried out using

Accepted Answer

Zinc

Answer

Tin

Answer

Copper

Answer

Chromium

Question 8

The working of a dry cell is based on

Accepted Answer

Electrolysis

Answer

Decomposition reaction

Answer

Spontaneous oxidation-reduction reaction

Answer

Combination reaction

Question 9

Galvanization is the :

Accepted Answer

Deposition of zinc on iron

Answer

Deposition of tin on iron

Answer

Deposition of copper on iron

Answer

Deposition of aluminium on iron