Ques. No. 9
Dear student
Solution to your asked query 9 is provided below:
(i) Mercury does not stick to a glass
(ii) Zinc oxide is basic in nature.
(iii) In general, the polarity of the cathode and anode is decided on the basis of the device used for different purposes.
In an electrolytic cell, the cathode is taken as a negative electrode while the anode is taken as a positive electrode. The two types of ions in refining are cations and anions. Cations carry pure metal while the anions carry the impurity. And since cations always possess a positive charge, therefore, they are attracted towards cathode as they are negatively charged (unlike charges attract each other) while the anions carry negative charge hence they get attracted towards the anode. Hence pure metal is always collected at the cathode.
For the remaining queries, we request you to post them in a separate thread.
Regards
Solution to your asked query 9 is provided below:
(i) Mercury does not stick to a glass
(ii) Zinc oxide is basic in nature.
(iii) In general, the polarity of the cathode and anode is decided on the basis of the device used for different purposes.
In an electrolytic cell, the cathode is taken as a negative electrode while the anode is taken as a positive electrode. The two types of ions in refining are cations and anions. Cations carry pure metal while the anions carry the impurity. And since cations always possess a positive charge, therefore, they are attracted towards cathode as they are negatively charged (unlike charges attract each other) while the anions carry negative charge hence they get attracted towards the anode. Hence pure metal is always collected at the cathode.
For the remaining queries, we request you to post them in a separate thread.
Regards