Chemistry - GOC Question with Solution | TestHub

ChemistryGOCAcid BaseHard2 minQB
ChemistryHardnumerical

Carbon-14 labelled propanoic acid, , is treated separately with two reagents.

+ NaH salt + gas A

+ salt + gas B

If X is the sum of the molar masses of A and B, find the value of X - 16.

Answer:
3.00
Solution:

With NaH the acid releases hydrogen : gas A = , molar mass 2. With it releases ammonia : gas B = , molar mass 17. The label stays behind in the carboxylate salt and does not enter either gas. X - 16 = 2 + 17 - 16 = 3.

Stream:JEESubject:ChemistryTopic:GOCSubtopic:Acid Base
⏱ 2mℹ️ Source: QB

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