1.

Fill up the blanks with the correct choice given in brackets: (i) Ionic or etectrovalent compounds do not conduct electricity in their .......... state. (fused/solid) (ii) Electrolysis of aqueous sodium chloride solution will form .......... at the cathode. (hydrogen gas/ sodium metal ) (iii) Dry hydrogen chloride gas can be collected by ........ displacement of air. (downward/upward) (iv) The most common ore of iron is .......... (calamine/haematite) (v) The salt prepared by the method of direct combination is .......... (iron (II) chloride/iron (III) chloride).

Answer»

(i) solid 

(ii) hydrogen gas 

(iii) downward (HCl gas is heavy than air) 

(iv) haematite 

(v) iron (III) chloride



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