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How many groups and periods are present in the Modern Periodic Table?
How many molecules are present in one mole of water?
How many moles are there in 140g of Si (atomic mass of silicon is 28)
How many neutrons does iron have?
Hydrogen and chlorine react vigorously in the presence of light (explosively) due to the formation of
Hydrogen bomb is based on the principle of
Hydrogen fuel cell vehicles produce one of the following asexhaust
Identify the natural indicator.
If lime water is kept in the air, it turns milky due to presence of :
If the sewage is fully oxidized, the nitrogen is in the form of