What are Aldehydes ?
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........... is not a sub atomic particle of an atom.
Atomic number of an atom gives the number of which of the following ?
Which element is generally No Radioactive?
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period?
Benzene is ______ in ethyl alcohol.
An element A forms an oxide with formula A3O4. What is the valency of element A?
Chemical formula for sulphurous acid is:
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