1. In purines which two rings are fused to each other?
a] pyrimidine & imidazole
b] pyrimide & furan
c] pyrene & furan
d] None of these
2. The formation of alloxan from uric acid, this reaction indicates that...
a] imidazole ring present in uric acid
b] pyrrole ring present in uric acid
c] pyrimidine ring present in uric acid
d] None of these
3. name of this compound :(CH3)3CCOOH
A] parabanic acid
b] pivalic acid
c] allantoin
d] alloxan
4. which of this structure is unsymmetrical?
A] Medicus formula of uric acid
b] fitting formula of uric acid
c] a & b both
d] None of these
5. which sentence is correct in following
A] molecular formula of caffeine C8H10O2N4
B] three N-CH3 groups present in caffeine
C] caffeine has uric acid structure
D] All of the above
6. in which compound 3’ or 5’ point of linkage phosphoric acid are present
A] ribose nucleoside
b] deoxyribose nucleoside
c] a and b both
d] None of these
7. which starch are water-soluble
A] α- amylose
b] amylose pectine
c] a and b both
d] None of these
8. the oxidation of allantoin with nitric acid which product is obtained
A] parabenic acid
b] hydantoin
c] oxalic acid
d] allaxone
9. how many glycose units present in a chain
A] 300 to 350 units
b] 100 to 150 units
c] 3000 units
d] 1000 units
10. nucleoside is made of...
A] nitrogenous base + pentose sugar
b] pentose sugar + phosphoric acid
C] nitrogenous base + phosphoric acid
d] none of these
11. conformer of BHC which conformer is optically active
A] β- conformer
b] δ- conformer
c] α- conformer
d] ϒ- conformer
12. conformer of BHC which conformer is most stable
A] β- conformer
b] δ- conformer
c] α- conformer
d] ϒ- conformer
13. which conformer of cyclo hexane is more stable?
A] chair
b] boat
c] twist boat
d] none of these
14. which system is present in camphor?
A] bicyclo (2,2,1) heptane
b] bicyclo (2,2,1) octane
c] bicyclo (2,1,1) hexane
d] bicyclo (1,1,1) pentane
15. in cyclopropane stablility of trans isomer is than cis isomer.
A] higher
b] lower
c] same
d] neglatable
16. in cyclohexan 1,4 diol...........
A] boat form is more stable than chair form
b] chair form is more stable than boat form
c] both are equally stable
d] None of these
17. in 2 Bromo cyclo hexanone why the equatorial form is less stable than axial form?
A] dipole-dipole interaction
B] 1,3 diarial interaction
C] H- bonding
D] A & C both
18. in alcohol & ether which type of isomerism is present
A] metamerism
b] chain
c] functional
d] position
19. which point group present in bicyclo (2,2,2) octane?
A] D3h b] C3v
c] C2v d] D2h
20. which conformer of BHC contain insectiside properties
A] α b] ɺ c] Ѵ d] ɳ
21. oestrone is ............
A] steroid b] non--- steroid
c] both d] None of these
22. in which compound two ketonic group is present
A] progesterone b] oesterone
c] lanosterol d] ergosterol
23. M.F. of ergosterol ..........
A] C28 H44 O B] C18H22O
C] C21H30O D] C30H50O
24. in which compound geminal dimethyl group is present?
A] lanosterol b] oestrone
c] progesteroned] None of these
25. the source of hormone is
A] corpus luteum
b] placenta pregnancy urine
c] adrenal cortex
d] all of these
26. acetylation of ergosterol gives
A] ergostenol acetate
b] ergosterol acetate
c] nor colanic acid acetate
d] all of these
27. by which process we get oestradiol from oestrone
A] hydrogenation b] hydrolysis
c] A & B both d] none of these
28. oxidation of cortison with CrO3 gives
A] adrenosterone b] androstane
c] A & B both d] none of these
29. molecular formula of cortisone is.....
A] C21H30O2 B] C28H44O
C] C21H28O5 D] C18H22O2
30. the smallest endocyclic valency angle in bicyclo [2,1,1] hexane is
A] 70° b] 81.2° c] 120° d] 109.28°
31. increase the intensity of the signal is called
A] nuclear overhauser effect
b] protonation effect
c] magnetic effect
d] None of these
32. full form of HMBC
A] heteronuclear molecular bond coherence
B] heteronuclear molecular bond correlation
C] heteronuclear multiple bond coherence
D] None of these
33. the protons are directly attached carbon atom the signal of the proton are detected by which detector
A] HMQC b] HMBC
c] A & B both d] None of these
34. the δ of deshilded proton is .......
A] higher b] lower
c] same d] none of these
35. name of [Eu(FHD)3]
A] europium tris decafluroheptane dione
b] europium tris decafluro heptane
C] europium Fluro heptane
d] None of these
36. in ipsenol the proton spectrum
A] opposite of F1 andF2
b] bottom side of scale
c] right of scale
d] None of these
37. which group’s irradiation is an increased enhancement of H-4 and H-6?
A] 5- methyl b] 3- methyl
c] A & B both d] none of these
38. which group’s irradiation is increased enhancement only H-4?
A] 5- methyl b] 3- methyl
c] 2- methyl d] None of these
39. which shift reagents are soluble in common NMR solvents?
A] [Eu(DPM)3]2 b] [Eu(FOD)3]
c] [Eu(FHD)3] d] all of these
40. HQF stands for?
A] Hot quantum filtering
b] Higher quantum filtering
c] Hold quantum filtering
d] None of these
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