1.
CH₃–CHCl–CH₂–CH₃ has a chiral centre. Which one of the following represents its R-configuration?
2.
If there is no rotation of plane-polarised light by a compound in a specific solvent, though it is thought to be chiral, it may mean that:
3.
Which of the following is not chiral?
4.
Which one of the following pairs represents stereoisomerism?
5.
The molecular formula of diphenylmethane. How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom?
6.
Which of the following pair of compounds are enantiomers?
7.
Geometrical isomers differ in
8.
CH₃–CH₂–C=O ↔ CH₂=CH–C–O⁻ are
9.
CH₃–CH(Cl)–CH₂–CH₃ obtained by chlorination of n-butane, will be:
10.
A compound of molecular formula C₇H₁₆ shows optical isomerism, the compound will be:
11.
The (R)- and (S)-enantiomers of an optically active compound differ in:
12.
But-2-ene exhibits cis-trans isomerism due to? [CBSE AIPMT 2000]
13.
Which of the following compounds is not chiral?
14.
Tautomerism will be exhibited by
15.
Which of the following will not show cis-trans isomerism?
16.
Which of the following will exhibit chirality?
17.
The number of possible isomers of the compound with molecular formula C₇H₈O is
18.
The process of separation of a racemic modification into d- and l-enantiomers is called?
19.
The most important chemical method to resolve a racemic mixture makes use of the formation of?
20.
Which of the following is an optically active compound?
21.
How many chain isomers could be obtained from the alkane C₆H₁₄?
22.
The compound that is most difficult to protonate is
23.
Which of the following is correct with respect to –I effect of the substituents? (R = alkyl)
24.
In pyrrole the electron density is maximum on?
25.
The pair of electrons in the carbanion CH≡C⁻–CH₃ is present in which orbitals?
26.
Consider the following compounds (I), (II), (III). In which does hyperconjugation occur?
27.
Which of the following is the most correct electron displacement for a nucleophilic reaction?
28.
The total number of π-bond electrons in the following structure is?
29.
The correct order of decreasing acidic strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C), and formic acid (D) is?
30.
The correct order of increasing bond length of C–H, C–O, C–C, C=C is?
31.
Which one of the following compounds has the most acidic nature?
32.
The stability of carbanions in the following: (iii) R2C=CH–, (iv) R3C–CH2
33.
Base strength order of (i) HC≡CH, (ii) HC=CH2, (iii) H3C–C≡CH
34.
Which among the following is the most stable carbocation?
35.
In HS–, I–, RNH2, NH3, order of proton accepting tendency will be?
36.
Which order is correct regarding –I effect of substituents?
37.
Correct increasing order of acidity
38.
Most stable carbocation among the following
39.
Most stable carbocation expected
40.
Electrophile involved in the reaction
41.
Correct statement regarding electrophile
42.
Which of the following statements is not correct for a nucleophile?
43.
The radical is aromatic because it has
44.
Which substituted phenol is the strongest acid?
45.
Which of the following is correct with respect to –I effect of the substituents? (R = alkyl)
