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Free download in PDF Class 11 Chemistry Chapter 12 Organic Chemistry Some Basic Principles And Techniques Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. /p>
(1)
Which of the following behaves both as a nucleophile and as an electrophile?
[A]
CH3C ≡ N
[B]
CH3OH
[C]
CH2 = CHCH3
[D]
CH3NH2
(2)
A crystalline solid possess which one of the following property?
[A]
Irregularity
[B]
Non- symmetric
[C]
Perfect geometric pattern
[D]
non- stability
Answer: Perfect geometric pattern
(3)
Inductive effect involves
[A]
displacement of σ electrons
[B]
delocalization of π electrons
[C]
delocalization of σ-electrons
[D]
displacement of π-electrons
Answer: displacement of σ electrons
(4)
Which element is estimated by Carius method
[A]
Carbon
[B]
Hydrogen
[C]
Halogen
[D]
Nitrogen
(5)
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: The compound is certainly meso
(6)
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
(7)
Which one of the following conformations of cyclohexane is chiral?
[A]
Twist boat
[B]
Rigid
[C]
Chair
[D]
Boat
(8)
The compound
is known by which of the following names
[A]
Bicyclo-[2, 2, 2] octane
[B]
Bicyclo-[2, 2, 1] octane
[C]
Bicyclo-[1, 2, 1] octane
[D]
Bicyclo-[1, 1, 1] octane
Answer: Bicyclo-[2, 2, 2] octane
(9)
0.0833mol of carbohydrate of empirical formula CH2O contain 1 g of hydrogen. The molecular formula of the carbohydrate is
[A]
C5H10O5
[B]
C3H4O3
[C]
C12H22O11
[D]
C6H12O6
(10)
In the Dumas method, the nitrogen present in organic compound gets converted to
[A]
Sodium Cyanide
[B]
Gaseoue Ammonia
[C]
Dinitrogen Gas
[D]
Ammonium Sulphate.
(11)
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
(12)
What is the correct IUPAC name of
[A]
4-methoxy-2-nitrobenzaldehyde
[B]
4-formyl-3-nitro anisole
[C]
4-methoxy-6-nitrobenzaldehyde
[D]
2-formyl-5-methoxy nitrobenzene
Answer: 4-methoxy-2-nitrobenzaldehyde
(13)
Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is
[A]
350
[B]
470
[C]
560
[D]
940
(14)
Which one is strongest acid among following options?
[A]
CH2FCOOH
[B]
CH2ClCOOH
[C]
CHCl2COOH
[D]
CHF2COOH
(15)
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
(16)
Which of the following cannot be represented by resonance structures?
[A]
Dimethyl ether
[B]
Nitrate anion
[C]
Carboxylate anion
[D]
Toluene
(17)
The displacement of electrons in a multiple bond in the presence of attacking reagent is called
[A]
Inductive effect
[B]
Electromeric effect
[C]
Resonance
[D]
Hyper conjugation.
Answer: Electromeric effect
(18)
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
(19)
Identify the chiral molecule among the following:
[A]
Isopropyl alcohol
[B]
2-pentanol
[C]
1-bromo 3-butene
[D]
Isobutyl alcohol
(20)
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: Different molecular weight
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