Need for Nomenclature

Q. What is the difference between isopentane and neopentane structures?

1. Iso has one $C{H}_3$ group and neo has two $C{H}_3$ on the C atom next to end C atom.
2. Iso has two $C{H}_3$ group and one has two $C{H}_3$ on the C atom next to end C atom.
3. Iso has two $C{H}_3$ group and neo has three $C{H}_3$ on the C atom next to end C atom.
4. None of above.

Q. The common name of the group $(C{H}_3{)}_{3}CC{H}_{2}C{H}_2-$ is:

1. Isobutyl
2. n-Hexyl
3. Neohexyl
4. Neopentyl

Q. The common name of the group $(C{H}_3{)}_{3}CC{H}_{2}C{H}_2-$ is:

1. Isobutyl
2. n-Hexyl
3. Neohexyl
4. Neopentyl

Q. Which one of the following is the mineral of gallium?

1. germanite
2. mica
3. felspar
4. none of these

Q. The IUPAC name is:

1. 3-methyl-2-penten-4-yne
2. 3-methyl-3-penten-1-yne
3. 3-methyl-4-penten-1-yne
4. 3-methyl pentenyne

Q. Which of the following is/are secondary prefix?

1. Carbamoyl
2. Sulpho
3. Cyano
4. Isocyanide

Q. Element which belongs to fourth period and group $IVA$ is:

1. $Ge$
2. $Ga$
3. $In$
4. $As$