NEET Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Organic Chemistry Multiple Choice Questions
MCQs on Organic Chemistry :
1. Which is the best-suited method for the separation of para and ortho-nitrophenols from 1:1 mixture?
(A) crystallisation
(B) chromatography
(C) sublimation
(D) steam distillation
Answer
Answer: (d)
2. Find the incorrect statement for a nucleophile
(A) A nucleophile is a Lewis acid
(B) Nucleophiles do not seek electron
(C) Ammonia is a nucleophile
(D) Nucleophiles attack low electron density sites
Answer
Answer: (a)
3. Which among the following is the most deactivating meta-directing group in aromatic substitution reaction?
(A) -COOH
(B) -SO3H
(C) -NO2
(D) -CN
Answer
Answer: (c)
4. Ammonia evolved from 0.75 g of the soil sample in the Kjeldahl’s method for nitrogen estimation, neutralises 10 ml of 1M H2SO4. Find the percentage of nitrogen present in the soil
(A) 35.33
(B) 37.33
(C) 43.33
(D) 45.33
Answer
Answer: (b)
5. The correct order of increasing nucleophilicity is
(A) Cl– < Br– < I–
(B) Br– < Cl– < I–
(C) I– < Br– < Cl–
(D) I– < Cl– < Br–
Answer
Answer: (a)
6. Homologous series of alkanols have a general formula
(A) CnH2nO2
(B) CnH2nO
(C) CnH2n+1O
(D) CnH2n+2O
Answer
Answer: (d)
7. Find the compound which undergoes nucleophilic substitution reaction exclusively by an SN1 mechanism
(A) Benzyl chloride
(B) Chlorobenzene
(C) Ethyl chloride
(D) Isopropyl chloride
Answer
Answer: (a)
8. Which of the following methods is best suited for the separation of a mixture containing naphthalene and benzoic acid
(A) Crystallisation
(B) Chromatography
(C) Sublimation
(D) Distillation
Answer
Answer: (c)
9. How many structural isomers are possible if one hydrogen in diphenylmethane is replaced by chlorine?
(A) 8
(B) 4
(C) 7
(D) 6
Answer
Answer: (b)
10. Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?
(A) to increase the concentration of NO3– ions
(B) to increase the solubility product of AgCl
(C) it increases the precipitation of AgCl
(D) for the decomposition of Na2S and NaCN formed
Answer
Answer: (d)