Question

43. Which of the following gases will have least volume
if 10 g of each gas is taken at same temperature and
pressure?
(a) CO2
(b) N
(c) CH4
(d) HCl​

Answer 1

Answer:

option a CO2 is correct

(assuming the second option as N & not N2)

Explanation:

as per ideal gas equation

p*v = m*R*t

the gas having least gas constant value will have the less volume, for the same pressure, temperature, mass.

R for CO2 = 0.189 J/kg*k

R for CH4 = 0.519 J/kg*k

R for HCl = 0.437 J/kg*k

R for N = 0.5938 J/kg*k

so least value of R is for CO2 hence, CO2 will be having least volume.

Answer 2

Answer:

CO2

Explanation:

Volume of gas = n * 22.4L, where n = mass/ molar mass

a) CO2 = (10/44) * 22.4L = 5L

b) N2 = (10/28) * 22.4L = 8L

c) CH4 = (10/16) * 22.4L = 14L

d) HCl = (10/36.5) * 22.4L = 6L

Hence, Order of volume = CH4>N2>HCl>CO2

Thus, CO2 has the least volume.

Hope this helped :)