NEET UG : General Organic Chemistry (GOC) NEET questions

1. The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is

(a) 13 σ bonds and no π bond

(b) 10 σ bonds and 3 π bonds

(d) 11 σ bonds and 2 π bonds. (NEET 2019)

2. Which of the following molecules represents the order of hybridisation sp², sp², sp, sp from left to right atoms?

(a) HC=C — C=CH

(b) CH₂=CH — C=CH

(d) CH₃ — CH=CH — CH₃ (NEET 2018)

3. The total number of π-bond electrons in the following structure is

(a) 12 (b) 16 (c) 4 (d) 8 (2015)

(2009)

(1) sp, sp², sp³ and sp² (2) sp, sp³, sp² and sp³

(3) sp³, sp², sp² and sp (4) sp, sp², sp² and sp³

(a) sp, sp², sp³ (b) sp³, sp², sp

11.

(a) 5-formylhex-2-en-3-one

(b) 5-methyl-4-oxohex-2-en-5-al

(d) 3-keto-2-methylhex-4-enal (2017)

12. The structure of isobutyl group in an organic compound is

(a)

(b)

(c)

(d) (2013)

13. Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is

(a)

(b)

(c)

(d) (2013)

14. Which nomenclature is not according to IUPAC system?

(a)

(b)

(c)

(d) (2012)

15.

(a) 4-ethyl-3-propylhex-1-ene

(b) 3-ethyl-4-ethenylheptane

(d) 3-(1-ethylpropyl)hex-1-ene. (2011)

16.

(a) trans-2-chloro-3-iodo-2-pentene

(b) cis-3-iodo-4-chloro-3-pentane

(d) cis-2-chloro-3-iodo-2-pentene. (2011)

17. The IUPAC name of the compound CH₃CH = CHC ≡ CH is

(1) Pent-4-yn-2-ene (2) Pent-3-en-1-yne

(3) Pent-2-en-4-yne (4) Pent-1-yn-3-ene (2010)

18. The IUPAC name of the compound having the formula CH = C — CH = CH₂ is

(a) 1-butyne-3-ene (b) but-1-yne-3-ene

19.

(a) 1-chloro-1-oxo-2,3-dimethylpentane

(b) 2-ethyl-3-methylbutanoyl chloride

(d) 3,4-dimethylpentanoyl chloride. (2006)