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Chemistry · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 1 · Q13
Assertion (A): Separation of Zr and Hf is difficult. Reason (R): Because Zr and Hf lie in the same group of the periodic table.
Assertion (A) : Separation of Zr and Hf is difficult.
Reason (R) : Because Zr and Hf lie in the same group of the periodic table.
Official answer
(C)
Assertion (A) is true, but Reason (R) is false.
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CBSE Class 12 Chemistry past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.