Question

Write IUPAC name of the compound having the formula n-C₄H₁₀.

Answer 1

The IUPAC name of n-C₄H₁₀ is butane.
This is because the compound is a saturated hydrocarbon and  has 4 carbon atoms in its molecule. If it has four carbon atoms in a single chain, it is represented by the word "but", and as it comprises all single bonds, it is represented by the ending "ane". Again, as the carbon atoms are in a single continuous chain, it is represented by n-Butane (where, n is normal).