24 JEE Main 2021 Hydrogen previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Hydrogen chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Hydrogen chapter hub.
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Hydr…
The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :-
Water does not produce CO on reacting with :
A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The ele…
Monomer of Novolac is :
Which one of the following methods is most suitable for preparing deionized water?
The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO 4 · 5 H 2 O is __________ .
Which of the following forms of hydrogen emits low energy β - particles?
Given below are two statements: Statement I : H 2 O 2 can act as both oxidising and reducing agent in basic medium. Sta…
Which one of the following statements is incorrect ?
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