A compound with molecular mass 180 is acylated with CH_3COCl to get a compound with molecular mass 390 . The number of amino groups present per molecu - Chemistry MCQ JEE Main 2026 | ExamTest.live

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A compound with molecular mass 180 is acylated with CH_{3} COCl to get a compound with molecular mass 390 . The number of amino groups present per molecule of the former compound is:

Solution & Step-by-step Explanation

In the acylation reaction: R-NH_{2} + CH_{3} COCl \to R-NH-COCH_{3} + HCl Each - NH_{2} group (mass 16) is converted to - NHCOCH_{3} (mass 16 + 42 = 58).Mass increase per amino group = 58 - 16 = 42 (or simply mass of CH_{3} CO minus H = 43 - 1 = 42).Total mass increase = 390 - 180 = 210 .Number of amino groups = \frac{Total increase}{Increase per group} = \frac{210}{42} = 5 .

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A compound with molecular mass 180 is acylated with CH_{3} COCl to get a compound with molecular mass 390 . The number of amino groups present per molecule of the former compound is:

5

4

6

2

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