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1.
The most abundant element in the universe is
2.
Copper objects lose their shine and form green coating of
3.
ee ele
4.
Amalgam is an alloy of
5.
Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
6.
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following
7.
Galvanisation is a method of protecting iron from rudftng by coating with a thin layer of
8.
In thermite welding a mixture of ______ and ______ is ignited with a burning magnesium ribbon which produces molten iron metal as large amount of heat is evolved.
9.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called
10.
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper etc. are reduced by using