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When zinc metal reacts with dilute sulphuric acid, a gas is evolved. Which one is a correct statement about the nature of this gas ?(1) colourless with suffocating odour(2) reddish brown and odourless(3) colourless and sweet smelling(4) colourless and odourless
Correct answer: (4) colourless and odourless
Explanation: When zinc reacts with dilute hydrochloric acid, it gives zinc chloride and hydrogen gas evolves. Hydrogen is colourless and odourless gas which evolves with bubbles.
The reaction is given by:
$Zn(s) + 2HCl(aq) → ZnCl_2(aq) + H_2(g)$
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