Question

A) Gram molar volume	1) $2.69\times {10}^{25}$
B) Avogadro number	2) $1.67\times {10}^{-24}$
C) Atomic mass unit	3) $6.023\times {10}^{23}$
D) Loschmidt number	4) $22.4$ L at S.T.P

• A. A - 4, B - 2, C - 3, D - 1
• B. A - 4, B - 3, C - 2, D - 1
• C. A - 1, B - 2, C - 3, D - 4
• D. A - 2, B - 1, C - 4, D - 3

Answer 1

Answer: (B)

A - 4, B - 3, C - 2, D - 1

At STP, all gases occupy $22.4$ L. This is known as gram molar volume.

One mole of any compound contains $6.023\times {10}^{23}$ molecules. This is known as the Avogadro number.

$1$ atomic mass unit is equal to $\frac{1}{12}$ of the mass of one carbon-12 atom and is equal to $1.67\times {10}^{-24}$.

Loschmidt number is $2.69\times {10}^{19}$.

Hence, the correct option is ( C )