JEE Main 2023Chemistryp Block Elements (Group 13 & 14)EasyMCQ

JEE Main 2023p Block Elements (Group 13 & 14) Question with Solution

JEE Main 2023 (29 Jan Shift 1)

Question

During the borax bead test with CuSO4, a blue green colour of the bead was observed in oxidising flame due to the formation of

Choose an option

Show full solutionCorrect option: C
Correct answer
CCuBO22

Step-by-step explanation

Blue green colour is due to formation of CuBO22. Copper gives blue green colour in borax bead test. Reactions which lead to formation of borax bead:

CuSO4ΔCuO+SO3

CuO+B2O3CuBO22

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About this question

This is a previous-year question from JEE Main 2023, 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.