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A metal 'M' reacts with an acid according to the equation. M + H+→ M3+ + H2.Which of the following is correct for metal M? A. Calcium B. Aluminium C. Barium D. Potassium |
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Answer» Among the given metals, only aluminium has a stable +3 oxidation state. Aluminium reacts with acid to produce a metal salt and H2 gas. For example: Al reacts with HCl to give AlCl3 and H2 gas. Reaction: Al (M) + HCl (H+) → AlCl3 (M3+) + H2 |
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