Which molecule contains a polar covalent bond?
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Atomic number of an atom gives the number of which of the following ?
Pentlandite is an ore/mineral of _______.
Benzene is ______ in ethyl alcohol.
Limestone is a raw material used by which industry?
Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
Which gas contributes most to the Greenhouse effect?
What happens in an oxidation reaction?
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