Question

Answer the following: 

(i) Name a metal which does not stick to glass. 

(ii) What is the nature of zinc oxide? 

(iii) What is deposited at the cathode, a pure or impure metal? 

(iv) Will carbon monoxide (CO) change the colour of blue litmus?

Answer 1

(i) Mercury is a metal which does not stick to glass as mercury lacks adhesive forces. 

(ii) Zinc Oxide is amphoteric in nature which means it can act as an acid as well as a base in a chemical reaction depending upon the reaction conditions. 

(iii) A pure metal will be deposited at cathode because cathode is a negative electrode and hence it attracts the positive metal ions from the electrolyte. 

(iv) Carbon Monoxide will change the color of the blue litmus if the litmus paper is moist as carbon monoxide will dissolve in the water molecules to form weak acid.