Question

33.Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.Required to answer. Single choice.

(1 Point)
32.Three 250 watt heaters are connected in parallel to a 100 volt supply. Calculate:
(A) the total current taken from the supply.
(B) the resistance of each heater.
(C) the energy supplied in kwh to the three h
eaters in 5 hours.




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Answer 1

Hydrogen gas burns with a pop sound.Observations- 1) When dilute sulphuric acid is poured on zinc granules, then zinc sulphate is formed along with the evolution of a gas. Zinc is more reactive than hydrogen, so displaced it from sulphuric acid.