1.

Three students performed the following reactions for the verification of the law of conservation of mass(A) added barium chloride solution to sodium sulphate solution in the flask and closed the flask with a cork(B) heated lead nitrate in a boiling test tube(C) added lead nitrate solution to the sodium chloride solution in a flask and closed the flask with a corkWhich students is not likely to get the correct result and why????

Answer»

B) heated lead nitrate in a boiling test tube is not likely to get the correct result.

Brown coloured fumes of NO2 gas are evolved and colour of the residue left behind is brown.

It is a decomposition reaction



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