Kamla prepared aqueous solutions of barium chloride (2.44g) and sodium
sulphate (3.06 g). She weighed them separately and then mixed them in a beaker
A white substance called precipitate was immediately formed. She filtered the
precipitate, dried it and weighed it. Now answer the following questions:
(i) What will be the mass of the precipitate after filtration?
(a) Same as reactants
(b) More than reactants
(c) Less than reactants
(d) Half than that of the reactants
(ii) Which law of chemical combination does this support?
(a) Law of constant proportion
(b) Law of multiple proportion
(c) Law of conservation of energy
(d) Law of conservation of mass
(iii) Name the scientist who proposed the above law
(a) Joseph Proust
(b) Antoine Lavoisier
(c) John Dalton
(d) Avogadro
(iv)How can you define a precipitate?
(a)Any substance formed during a chemical reaction
(b)A solid insoluble substance formed during a chemival reaction
(c)A gas formed during a chemical reaction
(d)A soluble substance formed during a chemical reaction
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