SELECT * FROM question_mgmt as q WHERE id=3529 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=253 and ex_no='6' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Acids, Bases and Salts write word equations and then balanced equations f

Question:

Write word equations and then balanced equations for the reaction taking place when –

(a) dilute sulphuric acid reacts with zinc granules.
(b) dilute hydrochloric acid reacts with magnesium ribbon.
(c) dilute sulphuric acid reacts with aluminium powder.
(d) dilute hydrochloric acid reacts with iron filings.

Answer:

(a) when sulphuric acid reacts with zinc granules, the product formed is zinc sulphate and hydrogen gas.

H2SO4 + Zn → ZnSO4 + H2

Sulphuric acid + Zinc → Zinc sulphate + Hydrogen

(b) when dilute hydrochloric acid reacts with magnesium it gives magnesium chloride and hydrogen gas evolved.

2HCl + Mg → MgCl2 + H2

Hydrochloric acid + Magnesium → Magnesium chloride + Hydrogen

(c) when sulphuric acid reacts with aluminium it gives aluminium sulphate and hydrogen gas evolve.

3H2SO4 + 2Al → Al2(SO4)3 + 3H2

Sulphuric acid + Aluminium → Aluminium sulphate + Hydrogen

(d) when iron metal reacts with hydrochloric acid it forms ferric chloride and hydrogen gas.

2HCl + Fe → FeCl2 + H2

Hydrochloric acid + Iron → Ferric chloride + Hydrogen


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