JEE Main 2020 — Hydrogen Question with Solution
From: JEE Main 2020 (Online) 7th January Evening Slot
Question
Among the statements (a) - (d), the correct ones are :
(a) Decomposition of hydrogen peroxide gives dioxygen.
(b) Like hydrogen peroxide, compounds, such as KCIO3, Pb(NO3)2 and NaNO3 when heated liberate dioxygen.
(c) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.
(d) Hydrogen peroxide is used for the manufacture of sodium perborate.
(a) Decomposition of hydrogen peroxide gives dioxygen.
(b) Like hydrogen peroxide, compounds, such as KCIO3, Pb(NO3)2 and NaNO3 when heated liberate dioxygen.
(c) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.
(d) Hydrogen peroxide is used for the manufacture of sodium perborate.
Choose an option
Show full solutionCorrect option: A
Correct answer
A(a), (b), (c) and (d)
Step-by-step explanation
H2O2 2H2O +O2
KClO3, Pb(NO3)2, NaNO3 on heating will release O2 gas.
2H3BO3 + 2NaOH + 2H2O2 Na2[B2(O2)(OH)4] + 4H2O
KClO3, Pb(NO3)2, NaNO3 on heating will release O2 gas.
2H3BO3 + 2NaOH + 2H2O2 Na2[B2(O2)(OH)4] + 4H2O
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Hydrogen chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2020, covering the Hydrogen chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.