SATHEE: Some Basic Concepts Of Chemistry Question 54

Some Basic Concepts Of Chemistry Question 54

Question: In an organic compound of molar mass $108 g m o l^{- 1} C$ , H and N atoms are present in 9 : 1 : 3.5 by mass. Molecular formula can be:

Options:

A) $C_{6} H_{8} N_{2}$

B) $C_{7} H_{10} N$

C) $C_{5} H_{6} N_{3}$

D) $C_{4} H_{18} N_{3}$

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Moles $\overset{C}{\frac{9}{12}}, \overset{H}{\frac{1}{1}}, \overset{N}{\frac{3.5}{14}}, n = \frac{108}{54} = 2$

$\frac{3}{4}, :, 1, :, \frac{1}{4}$

$4, :, 1, :, 4$

$\Rightarrow C_{3} H_{4} N \Rightarrow M . F . = {(C_{3} H_{4} N)}_{n}$

$M F = {(C_{3} H_{4} N)}_{2} = C_{6} H_{8} N_{2}$

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Some Basic Concepts Of Chemistry Question 54

Question: In an organic compound of molar mass 108gmol−1C , H and N atoms are present in 9 : 1 : 3.5 by mass. Molecular formula can be:

Options:

Answer:

Solution:

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Question: In an organic compound of molar mass $108 g m o l^{- 1} C$ , H and N atoms are present in 9 : 1 : 3.5 by mass. Molecular formula can be: