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a
2Na(s)+2H2O(l)→2NaOH(aq)+H2(g)
b
CH4(g)+2O2(g)→CO2(g)+2H2O(g)
c
AgNO3(aq)+NaCl((aq) )→AgCl(s)+NaNO3(aq)
d
CH3COOH(aq)+C2H5OH(aq)→CH3COOC2H5(am)+H2O(l)
answer is D.
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Detailed Solution
In reaction 1, products never reacts with each other to give products (in reversible reaction both forward and backward reactions must takes place)in reaction 2 also backward reaction is not possibleIn precipitation reactions backward reaction never takes place In 4th reaction, the products formed are reacted with each other to give reactants.