What is the ratio of masses of hydrogen and oxygen in the water?
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Which molecule contains a polar covalent bond?
______ character of a bond between two atoms is greater if the difference in their electro negativities is lesser.
Atomic number of an atom gives the number of which of the following ?
The elements known as primary nutrients for plants
Name the reddish brown gas evolved when Lead Nitrate is heated strongly.
Constantan is alloyed from ...... metals.
Which gas contributes most to the Greenhouse effect?