Question

Given van der Waals constant for $NH _{3}, H _{2}, O _{2}$ and $CO _{2}$ are respectively $4.17, 0.244, 1.36$ and $3.59$, which one of the following gases is most easily liquefied?

• A. $CO_2$
• B. $NH_3$
• C. $O_2$
• D. $H_2$

Answer 1

Answer: (B)

$NH_3$

Answer 2

??van der waal constant $'a'$ , signifies intermolecular forces of attraction.

??Higher is the value of $'a'$ , easier will be the liquefaction of gas.