CBSE MCQ Questions for Class 11 Chemistry Chapter 12 Organic Chemistry with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. This MCQ will help you score good marks in the final exam. Organic Chemistry Class 11 Chemistry MCQs are prepared for a better understanding of the concept. Organic Chemistry Class 11 Chemistry MCQ is prepared by Experts of CBSE.
Class 11 Chemistry Chapter 12 Organic Chemistry MCQs
Check the multiple-choice questions for the 11th Class Chemistry Chapter 12 Organic Chemistry. Select one answer out of 4 options.
Organic Chemistry Class 11 MCQs Questions with Answers
0.0833mol of carbohydrate of empirical formula CH2O contain 1g of hydrogen. The molecular formula of the carbohydrate is
(a) C5H10O5
(b) C3H4O3
(c) C12H22O11
(d) C6H12O6
Answer: (d) C6H12O6
An organic compound which produces a bluish green coloured flame on heating in presence of copper is
(a) Chlorobenzene
(b) Benzaldehyde
(c) Aniline
(d) Benzoic acid
Answer: (d) Benzoic acid
I.U.P.A.C. name of 4-isopropyl-m-xylene is
(a) l-Isopropyl-2, 4-Dimethyl benzene
(b) 4-Iso propyl-m-Xylene
(c) l-Isopropyl-3, 5-Dimethyl benzene
(d) 4-Isopropyl-3, 5-Dimethyl benzene.
Answer: (a) l-Isopropyl-2, 4-Dimethyl benzene
Identify the chiral molecule among the following
(a) Isopropyl alcohol
(b) 2-pentanol
(c) 1-bromo 3-butene
(d) Isobutyl alcohol
Answer: (d) Isobutyl alcohol
Among the following alkenes : 1-butane (I), cis-2-butene (II), trans-2-butene (III), the decreasing order of stability is
(a) III > II > I
(b) III > I > II.
(c) I > II > III
(d) II > I > III
Answer: (a) III > II > I
Which one is strongest acid among following options?
(a) CH2FCOOH
(b) CH2ClCOOH
(c) CHCl2COOH
(d) CHF2COOH
Answer: (b) CH2ClCOOH
Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is
(a) 350
(b) 470
(c) 560
(d) 940
Answer: (d) 940
If two compounds have the same empirical formula but different molecular formula they must have
(a) Different percentage composition
(b) Different molecular weight
(c) Same viscosity
(d) Same vapour density
Answer: (b) Different molecular weight
59 g of an amide obtained from a carboxylic acid, RCOOH, liberated 17 g of ammonia upon heating with alkali. The acid is
(a) Formic Acid
(b) Acetic Acid
(c) Propionic Acid
(d) Benzoic Acid
Answer: (b) Acetic Acid
The addition of carbonyl compound to HCN is an example of
(a) Nucleophilic substitution
(b) Electrophilic addition
(c) Nucleophilic addition
(d) Electrophilic substitution
Answer: (c) Nucleophilic addition
0.5 g of hydrocarbon gave 0.9 g water on combustion. The percentage of carbon in hydrocarbon is
(a) 75.8
(b) 80.0
(c) 56.6
(d) 28.6
Answer: (b) 80.0
59 g of an amide obtained from a carboxylic acid, RCOOH, liberated 17 g of ammonia upon heating with alkali. The acid is
(a) Formic Acid
(b) Acetic Acid
(c) Propionic Acid
(d) Benzoic Acid
Answer: (b) Acetic Acid
The C-H bond distance is longest in
(a) C2H2
(b) C2H4
(c) C2H6
(d) C2H2Br2
Answer: (c) C2H6
The arrangement of (CH3)3C -, (CH3)2CH-, CH3 CH2– when attached to benzene or unsaturated group in increasing order of inductive effect is
(a) (CH3)3C- < (CH3)2CH- < CH3 – CH2–
(b) CH3 -CH2– < (CH3)2CH- < (CH3)3C-
(c) (CH3)2CH-< (CH3)3C- < CH3-CH2–
(d) (CH3)3C- < CH3– CH2– < (CH3)2CH
Answer: (a) (CH3)3C- < (CH3)2CH- < CH3 – CH2–
Which one of the following conformations of cyclohexane is chiral?
(a) Twist boat
(b) Rigid
(c) Chair
(d) Boat
Answer: (a) Twist boat
The number and type of bonds between two carbon atoms in CaC2 are
(a) One sigma (σ) and one pi (π) bonds
(b) One sigma (σ) and two pi (π) bonds
(c) One sigma (σ) and one and half pi (π) bonds
(d) One sigma (σ) bond
Answer: (b) One sigma (σ) and two pi (π) bonds
If 0.228 g of silver salt of dibasic acid gave a residue of 0.162 g of silver on ignition then molecular weight of the acid is
(a) 70
(b) 80
(c) 90
(d) 100
Answer: (c) 90
If there is no rotation of plane polarized light by a compound in a specific solvent, thought to be chiral, it may mean that
(a) The compound may be a racemic mixture
(b) The compound is certainly a chiral
(c) The compound is certainly meso
(d) There is no compound in the solvent.
Answer: (c) The compound is certainly meso
0.92 g of an organic compound was analysed by combustion method. The mass of the U- tube increased by 1.08 g. What is the percentage of hydrogen in the compound?
(a) 13.04%
(b) 52.17%
(c) 65.21%
(d) 11.30%
Answer: (a) 13.04%
An organic compound which produces a bluish green coloured flame on heating in presence of copper is
(a) Chlorobenzene
(b) Benzaldehyde
(c) Aniline
(d) Benzoic acid
Answer: (d) Benzoic acid
The most satisfactory method to separate mixture of sugar is:
(a) Fractional crystallization
(b) Sublimation
(c) Chromatography
(d) None of these
Answer: (c) Chromatography
Which of the following behaves both as a nucleophile and as an electrophile?
(a) CH3C ≡ N
(b) CH3OH
(c) CH2 = CHCH3
(d) CH3NH2
Answer: (a) CH3C ≡ N
Which of the following is correct regarding the-I. Effect of substituents?
(a) -NR2 < -OR < F-
(b) -NR2 > -OR < -F
(c) -NR2 < -OR < -F
(d) -NR2 > -OR > -F
Answer: (a) -NR2 < -OR < F-
Inductive effect involves
(a) displacement of σ electrons
(b) delocalization of π electrons
(c) delocalization of σ-electrons
(d) displacement of π-electrons
Answer: (a) displacement of σ electrons
Which among the following is formed when an alcohol is dehydrated?
(a) alkane
(b) alkyne
(c) alkene
(d) aldehyde
Answer: (c) alkene
Which of the following physical properties differ for each of a pair of enantiomers?
(a) solubility in ethanol
(b) direction of rotation of plane-polarized light
(c) boiling point and melting point
(d) index of refraction
Answer: (b) direction of rotation of plane-polarized light