Question

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40. What is meant by a precipitation reaction? Explain by giving
equation for the reaction stating the states of the reactants and the product formed,
1. Select (1) combination reaction (ii) decomposition reaction and (ii) displacement reaction from me
following chemical equations:
(1) ZnCO3(s) -Zn0(s) + CO2(g)
(ii) Pb(s) + CuCl(aq) - PbCl2 (aq) + Cu(s)
(iii) NaBr(aq) + AgNO3(aq) AgBr(s) - NaNO3(aq)
(iv) Fe2O3 (g) 2Al - Al2O3 + 2Fe(s)
(v) 3H2(g) + N2(g) + 2NH3(g)
42. State the kind of chemical reactions in the following examples:
(1) Digestion of food in stomach
(ii) Combustion of coal in air
(iii) Heating of limestone.
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Answer 1

Here Is Your Ans ⤵

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➡A chemical reaction in which insoluble solid salt formed is Called precipitation reaction

AgNo3 + NaCl = AgCl + NaNO3

Here , AgCl is precipitated I.e insoluble solid salt

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