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Chemistry Class 12 Chapter 2
S-Block Elements
Test 9
1.
Hydrated calcium sulphate is known as?
Soda aesh
Lime
Gypsum
Soda water
2.
Lime is obtained by the thermal decomposition of?
Calcium hydroxide
Sodium carbonate
Calcium carbonate
Calcium sulphate
3.
In down’s cell at cathode deposits?
Hydrogen
None of these
Sodium
Clourine
4.
When gypsum is heated under controlled condition it is converted into?
Corundum
Bauxite
Plaster of paris
Calcite
5.
Plaster of paris is used for?
In surgery
All of these
Coins
Setting the fractured bones
6.
Down’s cell for the preparation of sodium uses?
Molten calcium hydroxide
Solid sodium
Molten sodium hydroxide
Molten sodium chloride
7.
In diaphragm cell anode is of?
Any one can be used
Sodium
Copper
Graphite
8.
The ease of decomposition relates to the?
Size of metal ion
Heat of neuterlization
Ionization energy of metal
Electron affinity of metal
9.
The cathode in the down’s cell is made of?
Iron or copper
Hot metals
None of these
Graphite
10.
At commercial scale sodium is produced by the?
All of these
Nelson cell
Down’s cell
Permanent cell
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