Answer :

(a) In the above given question element A is sodium and element B is chlorine. Because element A is a part of common salt and also kept under kerosene where as another element B has an atomic number 17.

(b) Here element C is sodium chloride and element D is sodium hydroxide.

(c) Element C will turn the litmus solution blue. Because a basic element will turn the litmus solution blue.

(d) From the above given statement we can say the element B is a gas.

(e) The formula of the compound formed when element B reacts with an element E having atomic number 5 is EB3.

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