20 JEE Main 2023 Some Basic Concepts of Chemistry previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2023 previous-year questions from the Some Basic Concepts of Chemistry chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Some Basic Concepts of Chemistry chapter hub.
Match List-I with List-II List-I List-II A 16   g of CH 4   ( g ) I Weighs 28 g B 1   g of H 2 ( g ) II…
0 . 5   g of an organic compound (X) with 60 % carbon will produce × 10 - 1   g of CO 2 on complete comb…
The volume of hydrogen liberated at STP by treating 2 . 4   g of magnesium with excess of hydrochloric acid is ...…
An organic compound gives 0 . 220   g of CO 2 and 0 . 126   g of H 2 O on complete combustion. If the % of ca…
A metal chloride contains 55 . 0 % of chlorine by weight. 100   mL vapours of the metal chloride at STP weigh 0 .…
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : 3…
If 5 moles of BaCl 2 is mixed with 2 moles of Na 3 PO 4 , the maximum number of moles of Ba 3 PO 4 2 formed is _ _ _ _…
The number of molecules and moles in 2 . 8375 litres of O 2 at STP are respectively
Number of hydrogen atoms per molecule of a hydrocarbon A having 85 . 8 % carbon is (Given : Molar mass of A = 84  …
A solution of sugar is obtained by mixing 200   g of its 25 % solution and 500   g   of its 40 %  …
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