JEE Main 2021Chemistryp Block Elements (Group 13 & 14)MediumNumerical

JEE Main 2021p Block Elements (Group 13 & 14) Question with Solution

JEE Main 2021 (26 Aug Shift 1)

Question

The ratio of number of water molecules in Mohr's salt and potash alum is ×10-1. (Integer answer)

Enter your answer

Show full solutionCorrect answer: 5
Correct answer
5

Step-by-step explanation

Mohr's salt =FeSO4NH42SO4·6H2O
Potash alum =KAlSO42·12H2O
So water molecule ratio =612=12=0.5=5×10-1
 

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the p Block Elements (Group 13 & 14) 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 2021, covering the p Block Elements (Group 13 & 14) 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.