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An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed, then a compound D is formed and two gases are liberated.

(a) What are A and B?

(b) Identify C and D.

(c) What will be the action of C on litmus solution? Why?

(d) State whether element B is a solid, liquid or gas at room temperature.

(e) Write formula of the compound formed when element B reacts with an element E having atomic number 5.

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1 Answer

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(a) A is sodium and B is chlorine

(b) C is sodium chloride and D is sodium hydroxide

(c) C will have no effect on litmus solution since it is neutral in nature.

(d) B is a gas at room temperature.

(e) EB3

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