What are the names of the three different rays emitted by
radioactive substances ?
What is Displacement Reaction .
What is a cell?
how to do heavy metal test for colour sample?
who invented the first projector?
Explain the Molecule?
How many millilitre is equal to 1 litre and how many microliter is equal to litre?
What is the unit of conductance?
Why is radiator used in a motor-ear ?
Explain substituted hydrocarbon?
Why is air removed from the electric lamps ?
Define what is oxidation and reduction reaction?
Why has the continuous supply of heat no effect on the rise of temperature after boiling point