Q91 · CSIR NET Chemistry, June 2011
Paper: CSIR NET June 2011 · Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: Mass Spec · Marks: 2 · Difficulty: Medium
In the mass spectrum of dichlorobenzene the ratio of the peaks at $m / z 146$, 148 and 150 , is:
(a)1:1:1
(b)3:3:1
(c)1:2:1
(d)9:6:1
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Two chlorines (³⁵Cl:³⁷Cl = 3:1) give M : M+2 : M+4 = 9 : 6 : 1.
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