Write the preparation of following compounds with balanced chemical equation : (i) Baking soda (ii) Bleaching powder…

CBSE Class 10 Science PYQ · Acids, Bases and Salts · Baking soda · 3 Marks · March 2026 · Standard

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333 Marks · March 2026 · Standard
Write the preparation of following compounds with balanced chemical equation :
(i) Baking soda
(ii) Bleaching powder
(iii) Plaster of Paris
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(i) $\ce{NaCl + H2O + NH3 + CO2 -> NaHCO3 + NH4Cl}$ (1 Mark)
(ii) $\ce{Ca(OH)2 + Cl2 -> CaOCl2 + H2O}$ / $\ce{2Ca(OH)2 + 2Cl2 -> Ca(ClO)2 + CaCl2 + 2H2O}$ (1 Mark)
(iii) $\ce{CaSO4.2H2O ->[373K] CaSO4.\frac{1}{2}H2O + 1\frac{1}{2}H2O}$ (1 Mark)
(deduct
frac{1}{2} mark for no / incorrect balancing)
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