For the following questions answer them individually
Catalytic converters are generally made from :
The green colour seen in firework displays is due to the chloride salt of :
The difference in the value of visible exports and visible imports is called :
Which country has the longest overland tunnel?
Addition of excessive amounts of heat to a lake is referred to as :
The apparent weight of a man in a lift is less the real weight when :
The remedies to soil erosion are :
I. Contour bunding
II. Regulation of land use
III. Cutting of trees
IV. Allowing grazing of animals
What according to Communism is the chief enemy of the society?