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Which of the following reacts with hydrochloric acid to give hydrogen as a product?(a) Zinc(b) Sodium carbonate(c) Sodium sulphate(d) Sodium nitrateI had been asked this question in exam.I'm obligated to ask this question of P-Block Elements in chapter P-Block Elements of Chemistry – Class 12

Answer» RIGHT option is (a) Zinc

Easy explanation: Active METALS such as zinc, magnesium, iron and aluminium react with hydrochloric ACID to produce their corresponding metal chlorides with the LIBERATION of hydrogen gas. Hydrochloric acid decomposes SALTS of weaker acids like carbonates, sulphides and so on.


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