Which of the following statement(s) is / are incorrect for $\mathrm{CO}_{2} ?$ (i) In laboratory…

Which of the following statement(s) is / are incorrect for $\mathrm{CO}_{2} ?$
(i) In laboratory $\mathrm{CO}_{2}$ is prepared by the action of dilute $\mathrm{HCl}$ on calcium carbonate
(ii) Carbon dioxide is a poisonous gas
(iii) Increase in carbon dioxide content in atmosphere lead to increase in green house effect.
(iv) $\mathrm{CO}_{2}$ as dry ice is used as a refrigerant for ice cream and frozen food.
  1. (i) and (ii)
  2. Only (ii)
  3. (i), (ii) and (iii)
  4. (ii) and (iii)

Solution

Carbon dioxide is not a poisonous gas. ^

Asked in: JEE-TOPICTESTS-CHEMISTRY

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