Chemistry - Study Mode

[#191] Which gas is used as fire extinguisher ?
Correct Answer

(A) Carbon dioxide

Explanation

Solution: Carbon dioxide is used as fire extinguisher.

[#192] The process which does not evolve CO 2 in air is
Correct Answer

(D) Photosynthesis

Explanation

Solution: The process which does not evolve CO 2 in air is photosynthesis.

[#193] The metal used to galvanise iron to protect it from rusting is
Correct Answer

(A) Zinc

Explanation

Solution: Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting.

[#194] Iron is prevented from rusting by coating with zinc. This process is called as
Correct Answer

(A) Galvanisation

Explanation

Solution: Iron is prevented from rusting by coating with zinc. This process is called as galvanisation.

[#195] An electric iron has a heating element made of :
Correct Answer

(C) Nichrome

Explanation

Solution: Nichrome is Used in an Electric Iron as a heating Element . It is an alloy of Nickel and Chromium with 80 % Nickel and 20 % Chromium. It has a high melting Point of 1400 degree Celsius.