JEE Main 2020Chemistryp Block Elements (Group 13 & 14)MediumMCQ

JEE Main 2020 — p Block Elements (Group 13 & 14) Question with Solution

JEE Main 2020 (04 Sep Shift 1)

Question

On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is:

Choose an option

Show full solutionCorrect option: C
Correct answer
C+3

Step-by-step explanation

PbNO32→ΔPbO+2NO2                                        A (brown gas)

2NO2Ag→coolingN2O4B

                                 +3NO2g+NOg→N2O3'                                   C

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 2020, 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.