Difference between an Atom and an Ion ?
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Why is sodium preserved in kerosene oil ?
How is the measurement of ph made?
What is meant by ph of a solution?
what is the formula of diesel,petrol & CNG too?
Why is a newly made quit warmer than an old one ?
Explain about Atomic Weight ?
From which substance are the dues manufactured ?
What is phase transfer catalyst?
What is General Properties of Bases ?
How is measurement of ph made?
what is the valence of nitrogen?
How many elements have been discovered on the Periodic Table?