Some Basic Concepts of Chemistry

JEE Main · Chemistry · 9 past questions

These are the board's own papers. 200 more board questions reprinted in the books we use in class are for signed-in students: sign in.

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1. Q2 2026 2 Apr Shift 2

   The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight…

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2. Q7 2026 6 Apr Shift 1

   An oxide of iron contains 69.9% iron, its empirical formula, is…

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