Chemistry - Study Mode

[#1026] The purest form of water in nature is
Correct Answer

(A) Rain water

Explanation

Solution: Rain water is considered the purest form of water. Impurities and salts present in water on earth are left behind during vaporisation by the sun.

[#1027] In drinking water supply, which of the following treatments is not involved
Correct Answer

(C) Softening

Explanation

Solution: Softening is not involved in drinking water supply.

[#1028] The two metal ions that cause hardness to water are:
Correct Answer

(A) Calcium, Magnesium

Explanation

Solution: Calcium and magnesium ion cause hardness of water.

[#1029] Laughing gas is
Correct Answer

(B) Nitrous oxide

[#1030] Electric fuse is an alloy of
Correct Answer

(A) Tin and lead

Explanation

Solution: An electrical fuse is a safety device in the circuit that protects electrical systems by breaking the connection when a short circuit is occurring. The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting.