HEllO. Sir
what i should studie from this chapter
for board exam .
give me some important point.
Asked by chetanbishwas2014
9th August 2017,
9:30 PM
Answered by Expert
Answer:
1. Give reason. Sodium is stored in kerosene. [2M]
2. What is an alloy? Give two examples with their chemical composition. [2M]
3. Distinguish between metals and non-metals.
Define calcinations with example. [3M]
4. Give reason. Common salt has high melting and boiling points.
Write one method of preventing rusting of iron. [3M]
5. In the extraction of aluminium. [5M]
(i) Name the process of concentration of bauxite.
(ii) Write the cathode reaction in electrolytic reduction of alumina.
(iii) Write the function and formula of cryolite in the extraction of aluminium.
6. Describe the process of preparation of aluminium by the electrolysis of alumina.
[5M]
OR
Explain the electrolytic reduction of alumina.
Draw and label the diagram of electrolysis of alumina and explain the electrolytic reduction of alumina. [5M]
2. What is an alloy? Give two examples with their chemical composition. [2M]
3. Distinguish between metals and non-metals.
Define calcinations with example. [3M]
4. Give reason. Common salt has high melting and boiling points.
Write one method of preventing rusting of iron. [3M]
5. In the extraction of aluminium. [5M]
(i) Name the process of concentration of bauxite.
(ii) Write the cathode reaction in electrolytic reduction of alumina.
(iii) Write the function and formula of cryolite in the extraction of aluminium.
6. Describe the process of preparation of aluminium by the electrolysis of alumina.
[5M]
OR
Explain the electrolytic reduction of alumina.
Draw and label the diagram of electrolysis of alumina and explain the electrolytic reduction of alumina. [5M]
Answered by Expert
10th August 2017,
1:00 PM
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