JEE Main 2003 — d and f Block Elements Question with Solution
JEE Main 2003
Question
A red solid is insoluble in water. However it becomes soluble if some is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
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Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
On heating decomposes as
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This is a previous-year question from JEE Main 2003, covering the d and f Block Elements 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.