Draw the diagram of the arrangement of apparatus to show that acid solution in water conducts electricity and label the battery.

The diagram of the arrangement of apparatus to show that acid solution in water conducts electricity is as follows: The battery is tagged in it. Acids are good conductors of electricity. When an acid is added to water, it loses hydrogen ions H + and also anions. The ions conduct electricity in the water.

Draw the diagram of the apparatus used in the refining of copper sulphate solution. Label the anode mud.

The diagram of the apparatus used in the refining of copper sulphate solution is as follows: The anode mud is tagged in this diagram. Anode mud is a type of deposit which is insoluble. A deposit of anode mud is found in commercial electrolysis as a residue in anode.

Draw the diagram of the apparatus used in the refining of copper sulphate solution. Label the cathode.

The diagram of the apparatus used in the refining of copper sulphate solution is as follows: The cathode is tagged in this diagram. On passing electricity, Impure copper from the anode dissolves and goes into CuSO 4 solution and pure copper from the copper sulphate solution deposits on the cathode. Thus, pure copper metal is produced at the cathode.

What are amphoteric oxides?

The metal oxides which react with both acids and bases to produce salt and water are known as amphoteric oxides. Amphoteric compounds are compounds that react with both acid and bases.

Draw the diagram of the apparatus used in electroplating and label the following part: The substance to be electroplated.

The above diagram shows the apparatus used in electroplating. In the above setup, the iron key is made cathode(negative electrode) that to be electroplated and a thin sheet of pure copper is made an anode (positive electrode). The electrolytic solution is an acidified solution of copper sulphate. When electricity is passed through copper sulphate solution the copper metal gets dissolved in the solution and gets electroplated on the iron key.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-Metals>Karnataka Board-2018>Q 3

MEDIUM

10th Karnataka Board

IMPORTANT

Earn 100

Draw the diagram of an electrolytic cell used in the purification of copper and label the electrode having impure copper.

Important Questions on Metals and Non-Metals

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-Metals>Karnataka Board-2018>Q 4

Observe the following chemical equations:

(i) ${Al}_{2} O_{3} + 2 NaOH \to 2 {NaAlO}_{2} + H_{2} O$

(ii) ${Al}_{2} O_{3} + 6 HCl \to 2 {AlCl}_{3} + 3 H_{2} O$

What is the conclusion that you take about the nature of aluminium oxide with the help of these equations? Give a reason for your conclusion.

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-Metals>Karnataka Board-2018>Q 5

Molten cryolite is mixed with molten alumina in the extraction of aluminium by electrolysis. Why? Name the substances that are used as anode and cathode in this method.

EASY

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-Metals>Karnataka Board-2019>Q 6

What is roasting in metallurgy?

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 3 - Metals and Non-Metals>Karnataka Board-2019>Q 7

Draw the diagram of the apparatus used in the electrolysis of water. Label the graphite rod.

MEDIUM

10th Karnataka Board