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Match the column I with column II and mark the appropriate choice.
Column I Column II
(A) Mass of H₂ produced when 0.5 moles of zinc reacts with excess of HCI (i) 3.01 x 10²³ molecules
(B) Mass of all atoms of a compound with formula C₇₀H₂₂ (ii) 6.023 x 10²³molecules
(C) Number of molecules in 35.5 g of Cl₂ (iii) 1.43 x 10^-21 g
(D) Number of molecules in 64 g of SO₂ (iv) 1 g
A B C D
1 ii i iv iii
2 i ii iii iv
3 iv iii i ii
4 iv iii ii i

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answer is C.

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Detailed Solution

(A) Zn + 2HCl → ZnCl₂ + H₂
1 mole of Zn produces 2 g of H₂
0.5 mole of Zn will produce 1 g of H₂.
(B) Molar mass of C₇₀H₂₂ = 862
Mass of atoms = 862 16.023 x 10²³ - 1.43 x 10^-21 g
(C) 71 g of Cl₂ = 6.023 x 10²³ molecules
35.5 g of Cl₂ - 3.01 x 10²³ molecules
(D) Molar mass of SO₂ = 64 = 1 mole
64 g of SO₂ - 6.023 x 10²³ molecules

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