PG TRB free Online Test Chemistry

MARAN ACADEMY

PG TRB CHEMISTRY

  

 

1. The colour obtained when con.H2SO4 is added to a solution of cholesterol in chloroform is
   1.   red
   2.   green
   3.   blue
   4.   violet
2. The size of the rings in a cholesterol could be determined using
   
   1.   B-W degradation
   2.   ozonolysis
   3.   blanc’s rule
   4.   selenium dehydrogenation method
3. Which of the following is not an androgen ?
   1.   androsterone
   2.   testosterone
   3.   oestrone
   4.   all of these
4. Steroids on heating in the selenium give
   1.   phenanthrena
   2.   cholesterol
   3.   diels hydrocarbon
   4.   isoprene
5. Cholesterol on selenium dehydrogenation at 420℃gives
   1.   diels hydrocarbon
   2.   chrysene
   3.   naphthalene
   4.   cholestane
6. Ozonolysis of ------------- gives formaldehyde as one of the products
   1.   Cholesterol
   2.   ergosterol
   3.   ergocalciferol
   4.   oestrone
7. The number of keto groups and alcoholic groups in cortisone respectively are
   1.   2 and 2
   2.   3 and 2
   3.   3 and 3
   4.   2 and 3
8. The molecular formula of diels hydrocarbon
   1.   C14 H28
   2.   C16 H18
   3.   C18 H16
   4.   C14H3O
9. Which one of the following does not an α-βunsaturated carboxyl groups ?
   
   1.   androsterone
   2.   testosterone
   3.   oestrone
   4.   progesterone
10. Vitamin D2 is known as
    1.   ergocaliferol
    2.   tocopherol
    3.   axerophthol
    4.   phylloquinone
11. In Emde’s degradation the catalyst used is
    1.   Sodium
    2.   Sodium amalgam/ethanol
    3.   Methyl iodide
    4.   Sodium amalgam
12. The presence of number of methyl groups in an alkaloid is determined by
    1.   Ziesel’s Method
    2.   Acetylation Method
    3.   Ziegler’s Method
    4.   Hofmann’s Method
13. Alkaloids are usually
    1.   Non-volatile solids
    2.   have bitter taste
    3.   optically active
    4.   optically inactive
14. HI is used in
    1.   Ziesel’s Method
    2.   Herzig-Meryer Method
    3.   Hofmann’s exhaustive methylation Method
    4.   both (a) and (b)
15. The heterocyclic ring can be opened in alkaloids using
    1.   hofmanns exhaustive methylation method
    2.   herzig-meyer method
    3.   zeisels method
    4.   zerewitinoff method
16. The number of active hydrogens in alkaloids are determined by
    1.   herzig-meyer method
    2.   zeisels method
    3.   zerewitinoff method
    4.   burchard method
17. Alkaloids used for dilating eye pupil is
    1.   ephedrine
    2.   atropine
    3.   morphine
    4.   papaverine
18. .
    The presence and number of methoxy group in a alkaloid is determined by
    
    1.   ziesels method
    2.   acetylation method
    3.   herzig method
    4.   zerewitinoff method
19. This is a narrow spectrum antibiotic
    1.   penicillin
    2.   hystatin
    3.   tetracycline
    4.   chloromycetin
20. .
    Which of the following hetero cyclic compounds is not aromatic
    
    1.   Pyridine
    2.   Pyrrole
    3.   Furan
    4.   Piperidine
21. Hyper conjugation is shown by molecule containing
    1.   C-H bond and a α C=C bond
    2.   Only C-H bond
    3.   Only C=C bond
    4.   No C=C bond
22. Which of the following has more –I effect?
    1.   -NO
    2.   -COOH
    3.   -Br
    4.   C6 H5 –
23. Inductive effect is shown by molecule containing
    1.   Single bond
    2.   double bonds
    3.   triple bonds
    4.   Ionic bonds
24. Which of the following has more +I effect?
    1.   CH3CH2-
    2.   CH3-
    3.   (CH3)3 C+
    4.   (CH3)2 CH-
25. Na+ is an example of
    1.   Hard acid
    2.   Soft acid
    3.   Hard base
    4.   Soft base
26. .
    The carbenium ion coordination number of atom of carbon is
    
    1.   1
    2.   2
    3.   3
    4.   4
27. .
    Inductive effect may be used to explain
    
    1.   Dipole Moment of bond
    2.   Strength of acids
    3.   Strength of base
    4.   All of these
28. Which one of the following is most stable carbocation?
    1.   CH3+
    2.   CH2CH2+
    3.   (CH3)2CH+
    4.   (CH3)3C+
29. The number of unshared electrons present on the carbon atom of carbene is
    1.   1
    2.   2
    3.   3
    4.   4
30. CO is an example of
    1.   Soft acid
    2.   Soft base
    3.   Hard acid
    4.   Hard base