List of top Chemistry Questions on Allotropes of carbon asked in JEE Main

Consider the following compound (X):

The most stable and least stable carbon radicals, respectively, produced by homolytic cleavage of corresponding C - H bond are:

Species having carbon with sextet of valence electron and acts as an electrophile is:

The normal rain water is slightly acidic and its $pH$ value is $56$ because of which one of the following ?

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Activated charcoal adsorbs $SO_2$ more efficiently than $CH_4$.
Reason R: Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In the light of the above statements, choose the correct answer from the options given below.

In the titration of KMnO₄ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is _____.

Sodium Carbonate cannot be used in place of $(NH_4)_2CO_3$ for the identification of $Ca^{2+},\, Ba^{2+}$ and $Sr^{2+}$ ions (in group V) during mixture analysis because :

How many carbon atoms are there in a molecule of tyrosine?