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1.
is used in space and submarines because it
is used in space and submarines because it
2.
A metal 
readily forms its sulphate 
which is water soluble. It forms its oxide 
which becomes inert on heating. It forms its insoluble hydroxide 
which is soluble in 
solution. Then, is
readily forms its sulphate which is water soluble. It forms its oxide which becomes inert on heating. It forms its insoluble hydroxide which is soluble in solution. Then, is
3.
Which of the following exists in polymeric form?
4.
The element which on burning in air gives peroxide is
5.
Electric cookers have a coating of ....that protects them against fire.
6.
Limestone is not used in which of the following manufacturing processes?
7.
is reduced by 
to
is reduced by to
8.
If 
is passed in excess into lime water, the milkiness first formed disappears due to:
is passed in excess into lime water, the milkiness first formed disappears due to:
9.
Which of the following compounds is a peroxide:
10.
Milk of lime is: