JEE Main 2020ChemistryHydrogenHardNumerical

JEE Main 2020 — Hydrogen Question with Solution

JEE Main 2020 (04 Sep Shift 2)

Question

Consider the following equations :
2Fe2++H2O2→xA+yB

(in basic medium)

2MnO4-+6H++5H2O2→x'C+y'D+z'E

(in acidic medium)

The sum of the stoichiometric coefficients x,y,x',y' and z' for products A,B,C,D and E respectively, is _______

Enter your answer

Show full solutionCorrect answer: 19
Correct answer
19

Step-by-step explanation

(i)  2Fe2++H2O2→2Fe3++2OH−

(ii)  2MnO4-+5H2O2+6H+⟶2Mn2++5O2+8H2O

So sum of x+y+x1+y1+z1=2+2+2+5+8=19 

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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.