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Some faculty ...

Question

Some faculty members of XYZ classes were trying to simplify a problem for students by mentioning data explicity about a gaseous mixture. Information given by them is as follow.
Faculty - 1 : Mixture consist of three gases A, B and C.
Faculty - 2 : Molar mass of B is twice of A & Molar mass of A is $4$ times of C.
Faculty 3 : The gas that is neither heaviest nor lightest is $16 %$ by mass.
Faculty - 4 : Molar ratio of heaviest to lightest gas is $2 : 5$
Based on the above information, answer the question that follows.
Which of the following options correctly represents gases A, B and C respectively?

A

O_{2}, C H_{4}, H e

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B

C H_{4}, O_{2}, H e

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C

O_{2}, S O_{2}, H e

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D

O_{2}, S O_{2}, C H_{4}

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Solution

The correct option is C $C H_{4}, O_{2}, H e$
If the three gases are $O_{2}, C H_{4}$ and $H e$ ,
Molar mass of $O_{2} = 32$
Molar mass of $C H_{4} = 16$
Molar mass of $H e = 4$
$M_{O_{2}} = 2 M_{C H_{4}}$ & $M_{C H_{4}} = 4 M_{H e}$
Given, $M_{B} = 2 M_{A}$ & $M_{A} = 4 M_{C}$
$∴ A, B, C$ are $C H_{4}, O_{2}$ & $H e$ respectively.

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Similar questions

Q. Some faculty members of XYZ classes were trying to simplify a problem for students by mentioning data explicity about a gaseous mixture. Information given by them is as follow.
Faculty - 1 : Mixture consist of three gases A, B and C.
Faculty - 2 : Molar mass of B is twice of A & Molar mass of A is

4

times of C.
Faculty 3 : The gas that is neither heaviest nor lightest is

16 %

by mass.
Faculty - 4 : Molar ratio of heaviest to lightest gas is

2 : 5

Based on the above information, answer the question that follows.
What would be the average molar mass of mixture.

Q. Some faculty members of XYZ classes were trying to simplify a problem for students by mentioning data explicity about a gaseous mixture. Information given by them is as follow.
Faculty - 1 : Mixture consist of three gases A, B and C.
Faculty - 2 : Molar mass of B is twice of A & Molar mass of A is

4

times of C.
Faculty 3 : The gas that is neither heaviest nor lightest is

16 %

by mass.
Faculty - 4 : Molar ratio of heaviest to lightest gas is

2 : 5

Based on the above information, answer the question that follows.
What is the molar ratio of A : B :C?

Q. A gaseous mixture containing

H e, C H_{4}

S O_{2}

was allowed to effuse through a fine hole then find what molar ratio of gases coming out initially?

( Given : mixture contains

H e, C H_{4}

S O_{2}

in 1:2:3 mole ratio ).

Q. A gaseous mixture containing

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5

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