The pair of compounds having the same general formula.

In which of the following pair of compounds having same general formula ?

In which of the following pair of compounds having same general formula ?

Which of the following pairs of componds have the same general formula C_(n)H_(2n) ?

The total number of compounds than have the same general formula as the alkyne of four C atoms is

________ is a group or a class of organic compounds having same general formula and similar chemical properties .

Boranes have general formula

How many of following compound have same general formula C_(n)H_(2n-6) .

The compounds having the general molecular formula A^(2+)Fe_(2.04) are called ……….. .