Some Basic Principles Of Organic Chemistry Question 61

Question: An organic compound contains C=74.0 H=8.65 and N=17.3 . Its Empirical formula is [MP PMT 1986]

Options:

A) C5H8N

B) C10H12N

C) C5H7N

D) C10H14N

Show Answer

Answer:

Correct Answer: C

Solution:

Element No.of Moles Simple Ratio
C = 74 74/12 = 6.1 6.1/1.2 = 5.08 or 5
H = 8.65 8.65/1= 8.65 8.6/1.2 = 7.16 or 7
N = 17.3 17.3/14 = 1.2 1.2/1.2 = 1 or 1

Therefore Empirical formula =C5H7N .



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