Chemistry MCQ

1. The IUPAC name of CH3C(CH3)2 CH2CH CH2 is :

1. 2,2-dimethyl-4-pentene
2. 4,4-dimethyl-1-pentene
3.1,1,1-trimethyl-3-butene
4 2-chloro-4,4-dimethylhexane

2. The IUPAC name of CH3 — C CCH(CH3)2 is :

1. 2-bromo-1-chloro but-1-ene
2.4,4′ -dimethyl-2-pentyne
3. methyl isopropyl acetylene
4. 4,4,4-trimethyl-1-butene

3. The IUPAC name of CH3CH2C(Br) CHCl is :

1. 4-chloro-3-bromo but-3-ene
2. 2-bromo-1-chloro butane
3. 2-bromo-1-chloro but-1-ene
4.2-bromo-2-ethyl-3-chloro propene

4.The IUPAC name of the compound (CH3)2 CH – CH = CH – CHOH – CH3 is :

1.5-methylhex-3-en-2-ol
2.2-methylhex-3-en-5-ol
3.2-hydroxy-5-methyl-3-hexene
4. 5-hydroxy-2-methyl-3-hexene

5.The suffixes for alcohols, aldehyes and ketones according to IUPAC system are respectively :

1. -alc, -ald, -ket
2. -ol, -al, -ket
3. -ol, -al, -one
4.-coh, -ald, -one

6. Hybridized carbon atom used in the formation of the compound CH3 — CH=CH — CH2 — CH3 are :

1. sp and sp3
2. sp and sp2
3. only sp
4. sp2 and sp3

7. Which of the following statements is true about hybridization ?

1. Hybrid orbitals frequently undergo linear overlaps making sigma bonds.
2. Hybrid orbitals frequently undergo lateral overlaps making -bonds. In other words, there are several compounds in which -bonds are formed using hybrid orbitals.
3. Hybrid orbitals are molecular orbitals.
4. A hybrid orbital bigger in size makes shorter bond.

8. Carbon atoms in the compound (CN)4C2 are

1.sp hybridised >
2. sp2 hybridised
3. sp and sp2 hybridised
4. sp, sp2 and sp3 hybridised

9. In which bond angle is the highest

1.sp3
2. sp2
3. sp .
4.sp3d

10. Which of the following statements is correct about methyl group ?

1.It stabilizes both carbocation and free radical equally
2. it stabilizes a free radical more than a carbocation
3. it stabilizes a carbocation more than a free radical
4. none of these