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1.
The substance used in Holme's signal of the ship is a mixture of
2.
Causticisation process is used for the preparation of:
3.
Which of the following alkali metal ion in aqueous solution is the best conductor of electricity?
4.
Indian saltpetre is:
5.
The action of dilute 
on magnesium gives:
on magnesium gives:
6.
Brine is chemically:
7.
The atomic numbers of four elements are given below. Which is an alkaline earth metal?
8.
The plaster of Paris is:
9.
The ashes of plants contain alkali metals, 90% of which is:
10.
At high temperature nitrogen combines with 
to give:
to give: