2 English
SUBJECT : CHEMISTRY
1. Molecular weight of a hydrocarbon containing 6. Two isomers can be called stereo isomers if they
minimum number of C-atom to show optical have :-
isomerism:- (1) same connectivity of atoms but different
(1) 100 (2) 80 (3) 68 (4) 70 spatial arrangements of atoms or groups
2. Which one show G.I. :- about a bond or centre
(1) (2) same spatial arrangement of atoms or
(2) groups about a centre or bond but different
connectivity of atoms
(3) (4) (3) Different connectivity of atoms as well as
different spatial arrangment of atoms or
3. Which of the following can show geometrical
groups about a bond or centre
isomerism? (4) same connectivity of atoms as well as same
spatial arrangement of atom of groups
(1) Pent – 1 – ene
about a bond or centre.
(2) But – 2 – ene
7.
(3) 2 – methyl pent – 1 – ene In
(4) 2 – methyl but – 2 – ene
(1) µA > µB
4. Geometrical isomerism is not possible in
(2) Boiling point A > Boiling point B
(1) Cyclooctene (2) Cyclononene
(3) Melting point A > Melting point B
(3) Cyclodecene (4) Cyclobutene
(4) All are correct
5. The restricted rotation about carbon – carbon
8.
double bond in 2 – butene is due to :- is :-
(1) Overlap of one s – and sp2 – hybridized
orbitals. (1) R – (2) S – (3) E – (4) Z –
(2) Overlap of two sp2 – hybridized orbitals 9. Which of the following is a Z-isomer :-
(3) Overlap of one p – and one sp2 hybridized (1) (2)
orbitals
(4) Sideway overlap of two p – orbitals (3) (4)
PHASE - 12_MD_PT_CAJ_Sir_140425
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10. Butane (CH3 – CH2 – CH2 – CH3) can convert to 13. Identify chiral molecule
various conformation at room temperature.
According to following graph conformation
corresponding to (P) is :-
(1) A, C, E (2) A, C, D, E
(3) A, E (4) All
(1) Eclipsed (2) Anti form 14. Which of the following molecule will be chiral.
(3) Partially eclipsed (4) Gauche (1)
11. Which of the following pairs of structures
represent enantiomers ?
(2)
(1)
and (3)
(2)
and
(4) All of these
(3) 15. Match the column ?
and
Compound Chiral center
(P) (i) 2
(4)
and (Q) (ii) 1
12. shows (R) (iii) 0
(1) Geometrical isomerism
(1) P-ii, Q-iii, R-i (2) P-i, Q-ii, R-iii
(2) Optical isomerism
(3) P-ii, Q-i, R-iii (4) P-iii, Q-ii, R-i
(3) Both of these
(4) None of these
PHASE - 12_MD_PT_CAJ_Sir_140425
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4 English
16. Which of the following has maximum number of 19. Relation between given compounds ?
chiral atoms –
(1) CH3 – CH2 – CH2 – Br
(2)
(1) Identical (2) Enantiomers
(3) (3) Diastereomers (4) NOT Isomers
(4)
20. Which of the following contain chiral carbon ?
(1) isobutyl chloride (2) s - butyl chloride
17. For the given compounds A,B,C identify the
(3) 1 - Phenyl propane (4) Allyl chloride
statement that is true :- 21. Which of the following is not chiral:-
(1) 2-Butanol
(2) 2,3-Dibromo pentane
(3) 3-Bromo pentane
(4) 2-Hydroxy propanoic acid
(1) A and B are identical
(2) A and C are enantiomers
22. Which is chiral :-
(1) Butan-2-ol (2) 2-Amino butane
(3) B and C are identical
(3) 2-Methyl pentane (4) 1 and 2 both
(4) A and B are enantiomers
18. Which of the following does not contain chiral
23. Among the following four structures I to IV.
carbon but can show optical activity ?
(1)
(2)
it is true that
(3)
(1) All four are chiral compounds
(2) Only I and II are chiral compounds
(3) Only III is a chiral compound
(4) Only II and IV are chiral compounds
(4) Both (1) & (2)
PHASE - 12_MD_PT_CAJ_Sir_140425
1306CMD303029250001 14-04-2025
English 5
24. How many chiral carbon atoms are present in 28. Match the column
following compound ? Column - I Column - II
Number of
(a) (p)
chiral center = 1
Number of
(b) (q)
(1) 2 (2) 4 chiral center = 2
(3) 3 (4) 1 Number of
25. Number of chiral carbon present in the following
(c) (r)
chiral center = 3
compound :
Number of
(d) (s)
chiral center = 4
(1) 2 (2) 3
(1) a → p, b → q, c → r, d → s
(3) 4 (4) 5
26. How many chiral centres are present in the
(2) a → q, b → r, c → p, d → s
following compound :- (3) a → p, b → s, c → r, d → q
(4) a → p, b → q, c → s, d → r
29. How many chiral carbon present in following
molecule :-
(1) 4 (2) 5
(3) 6 (4) 7
27. How many chiral centre are present in compound (1) One (2) Two
(3) Three (4) Four
30. Chiral molecules are :
(1) Superimposable on their mirror image
(1) 6 (2) 5 (2) Not superimposable on their mirror image
(3) 7 (4) 4 (3) Unstable molecules
(4) Capable of showing geometrical isomerism
PHASE - 12_MD_PT_CAJ_Sir_140425
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