`2.24 dm^3` of methane at N.T.P. contain same number of molecules as are present in ________ .

Options

A. 1 mole of ozone
B. 3 g of ethane
C. 3.4 g of ammonia
D. 0.64 g of sulphur dioxide

Answer

B

Explanation

22.4 `dm^(3)` of Methane at N.T.P. contains `6.02xx10^(23)` molecules.
22.4 `dm^(3)` of Methane at N.T.P. contains `6.02xx10^(22)` molecules.
(a) 1 mole of `O_(3) -= 6.023 xx10^(23)`
(b) 3 gm of ethane `=(6.023 xx10^(23) xx3)/(30)`
`=6.023 xx10^(22)`
( c) 3.4 g of ammonia `=(6.023xx10^(23))/(17) xx3.4`
`= 1.2046 xx10^(23)`
(d) 0.64 g of `SO_(2) = (6.023 xx10^(23))/(64) xx0.64 xx10^(-2)`
`= 6.023 xx10^(21)`
Correct answer is (b).