Question

(iii) What type of chemical reaction takes place when:
a. A magnesium wire is burnt in air.
b. Lime stone is heated.
c. Barium chloride reacts with sodium sulphate to give white precipitate of
barium sulphate and sodium chloride remains in the solution.

Answer 1

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HERE IS YOUR ANSWER

A) When magnesium wire is burnt in air :

2Mg+O2=>2MgO

It is a combination reaction.

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B) When barium chloride reacts with sodium sulphate to give white precipitate of barium sulphate and sodium chloride remains in the solution.

BaCl2+Na2SO4=>BaSO4+2NaCl

It is a double displacement reaction.

And because precipitate is obtained, it is also a precipitation reaction.

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