Question

QUESTIONS
1.Why should a magnesium ribbon be cleaned before burning in air?
2.Write the balanced equation for the following chemical reactions.
(i) Hydrogen + Chlorine →Hydrogen chloride
(ii) Barium chloride + Aluminium sulphate → Barium sulphate +
Aluminium chloride
(iii) Sodium + Water→ Sodium hydroxide + Hydrogen
3.Write a balanced chemical equation with state symbols for the
following reactions.
(i) Solutions of barium chloride and sodium sulphate in water react
to give insoluble barium sulphate and the solution of sodium
chloride.
(ii) Sodium hydroxide solution (in water) reacts with hydrochloric
acid solution (in water) to produce sodium chloride solution and
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Answer 1

Answer:

magnesium ribbon should be cleaned before burning in air because magnesium is very reactive element which rapidly react with oxygen to form a white layer which is called magnesium oxide.

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