If 2 g of aluminium is treated, first with excess of dilute H₂SO₄ and then

If 2 g of aluminium is treated, first with excess of dilute H₂SO₄ and then with excess of NaOH, the ratio of the volumes of hydrogen evolved is

(a) 1:1
(b) 1:2
(c) 2:3
(d) 2:1

1:1

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