MDCAT Chemistry Past Papers MCQs Chapter Wise
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MDCAT Chemistry Past Papers MCQs
31. Can
sugar is hydroloysed in presence of _________ enzyme
(a) Zymase (c) Invertase
(b) Diastase (d)
both b, c
32. In
Ethyl alcohol formation effuvescence is due to
(a) formation of C2H5OH (c) Co2
(b) yeast (d) all
33. Which
one is not fermentable sugar
(a) Cane
juice (c) Molasses
(b) Fruit juice (d) none
34. Starch
is not found in
(a) potato (c)
rice
(b) maize (d)
butter
35. Oxidation
of parimary alcohol gives
(a) carboxylic acid
(c) ketone
(b) ether (d) none
36. Which
sugar is easily hydrolysed in fermentation __________ process
(a) monasaccharide (c)
Disaccharide
(b) polysaccharide
(d) both b, c
37. Which
one is secondary alcohol
(a) cyclohexnol (c) 2-Butanol
(b) 1-Pentanol (d)
both a, b
38. Rectified
spirit contain percentage of ethanol
(a) 12% (c)
14%
(b) 95% (d)
99%
39. Which
species is obtained as residue after crystalinzation of sugar
(a) Baggas (c)
Molasses
(b) yeast (d) sugar cane
40. Which
one is proper condition for fermentation
(a) proper aeration (c)
absence of presentative
(b) Dilute solution
(d) all
41. When
C-O bond is broken which species is reactive in alcohol
(a) primary (c)
secondary
(b) tertiary (d)
quartarney
42. The
functional gp present in ehtyl acetate
(a) ether (c)
ester
(b) carboxylic (d) ketone
43. Which
alochol resists oxidation
(a) primary
(c) secondary
(b) tertiary (d) all
44. When
ethanol react with ethyl chloride to form ethyl chloride which catalyst is used
(a) ZnCl2 (c)
Tho2
(b) pyridine (d)
H+
45. When
ethanol react with PCl5 which acid is produced
(a) HCl (c)
HNO3
(b) H3PO4 (d)
H3PO3
46. In
phenolate ion which species is delocalized with double bond
(a) negative charge (c)
lone pair of electron
(b) sigma bond (d) none
47. The
number of lone pair of electron in phenol are
(a) 1 (c)
2
(b) 3 (d)
4
48. The
colour of ppt of 2,4,6-Trinitrophenol
(a) yellow (c)
white
(b) green (d) pink
49. Number
of Pi-bond present in Picric acid
(a) 2 (c)
3
(b) 4 (d)
12
50. Nitric
acid can react with
(a) dil.HNO3 (c)
Conc.HNO3
(b) both a, b (d) none
51. Depolymerization
can be occured by ___________ process
(a) thermal (c) chemical
(b) both a, b (d) none
52. A
single chloride free radical can destroy many ozone molecules
(a) 100 (c)
100000
(b) 10000 (d)
10
53. Which one
is eye irritant
(a) H2O2 (c)
HNO3
(b) PAN (d)
HOCl
54. Main
chemical species present in straosphere which absorb radiation
(a) ozone (c) No2
(b) So2 (d) All
55. Temperature
of troposphere __________ with increasing altitude
(a) increase (c)
remain same
(b) decrease (d)
none
56. pH of
unpolluted rain water should be
(a) 7.1 (c)
5.6
(b) 6 (d)
6.5
57. Ozone
is allotropic form of
(a) Oxygen (c)
Nitrogen
(b) Sulphur (d)
Co2
58. At
present how much pesticides are formulated
(a) 10 thousand
(c) 10 lac
(b) Both b, c (d) One million
59. Which
one is carcinogen class of compounds
(a) Diesel oil (c)
Lubricating oil
(b) Dioxins (d)
Both a, c
60. Which
metal does not have safe limit
(a) Chromium (c)
Aluminium
(b) Calcium (d) Both a, b
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