pBlock ElementsII 1 Question 42
42. Which of the following is incorrect statement?
$(1978,1 \mathrm{M})$
(a) $\mathrm{NO}$ is heavier than $\mathrm{O}_{2}$
(b) The formula of heavy water is $\mathrm{D}_{2} \mathrm{O}$
(c) $\mathrm{N}_{2}$ diffuses faster than oxygen through an orifice
(d) $\mathrm{NH}_{3}$ can be used as a refrigerant
Objective Questions II
(One or more than one correct option)
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Solution:
- NO is lighter than $\mathrm{O}_{2}$.
$\mathrm{D}_{2} \mathrm{O}$ is commonly known as heavy water.
$\mathrm{N}{2}$ is lighter than $\mathrm{O}{2}$, effuse at faster rate under identical experimental conditions. $\mathrm{NH}{3}$ liquefies at very low temperature. Therefore, liquid $\mathrm{NH}{3}$ is used as a refrigerant.
