6 questions from 2025
\( X \) \( \text{g} \) of benzoic acid on reaction with \( \mathrm{aq\ NaHCO_3} \) released \( \mathrm{CO_2} \) that occupied \( 11.2 \, \text{L} \) volume at STP. \( X \) is ________ \( \text{g} \).
Which of the following compounds is least likely to give effervescence of \( \mathrm{CO_2} \) in presence of aq. \( \mathrm{NaHCO_3} \)?
'A' shows positive Lassaigne's test for \( \mathrm{N} \) and its molar mass is \( 121 \).'B' gives effervescence with aq. \( \mathrm{NaHCO_3} \).'C' gives fruity smell.Identify A, B and C from the following:
Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product? Choose the correct answer from the options given below:
Identify the pair of reactants that upon reaction, with elimination of \( \mathrm{HCl} \) will given rise to the dipeptide Gly-Ala.
The least acidic compound, among the following is:
