12th class (Fsc) Chemistry unit 10 MCQs
51. Methyl chloride reacts with Na-pb alloy to give:
a. Alkanes
b. TML
c. Alcohol
d. TEL
52. Ethyl chloride reacts with Na-pb alloy to give:
a. Alkanes
b. TML
c. Alcohol
d. TEL
53. In wurtz synthesis alkyl halide react with sodium in…… to give alkanes:
a. Water
b. Alcohol
c. Zn/HCL
d. Eher
54. Wurtz reaction involves in interaction of alkyl halides in dry ether with:
a. Zinc
b. Sodium
c. Platinum
d. Copper
55. Isopropyl magnesium bromide reacts with water to form:
a. Butane
b. Methane
c. Ethane
d. Propane
56. Butyl magnesium bromide reacts with ammonia to form:
a. Butane
b. Pentane
c. Ethanoic acid
d. Both and c
57. 2-chloropropane reacts with alcoholic KOH give:
a. 2-propanol
b. 2-propane
c. 1-propanol
d. 1-propane
58. Reaction of CO2 with n-propyl magnesium bromide give:
a. Ethanoic acid
b. Propanoic acid
c. Valeric acid
d. Butanoic acid
59. Reaction of CO2 with n-butyl magnesium bromide give:
a. Propanoic acid
b. Valeric acid
c. Pentanoic acid
d. Both b and c
60. Which of the following reacts with grignard’s reagent to give primary alcohol:
a. Methanal
b. Epoxide
c. Formaldehyde
d. All of these
61. When alcohol is made to react with alkyl magnesium halide, the product formed as:
a. Epoxide
b. Alkane
c. Alkene
d. All of these
62. Grignard’s reagent react to form alcoholic with:
a. Epoxide
b. Aldehyde
c. Ketone
d. All of these
63. The reaction of CO2 and PMgX in acidic media gives:
a. Propanoic acid
b. Valeric acid
c. Carpric acid
d. All of these
64. When 2-butanone is reacted with PMgX , the product is:
a. Ter-alcohol
b. Pri-alcohol
c. Thiol-alcohol
d. Sec-alcohol
65. Grignard’s reagent was first prepared by Victor Grinard in:
a. 1900
b. 1700
c. 2000
d. 1800
66. When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is:
a. Propanal
b. Propane
c. 1-Propanol
d. Propanic acid
67. Whenever PMgX reacts with propanone it forms:
a. Ter-alcohol
b. Pri-alcohol
c. Alkane
d. Sec-alcohol
68. Grignard reagent is represented by a general formula:
a. R-Ca-X
b. R-Mg-O
c. R-Mg-X
d. R-Mg-N
69. In primary alkyl halide, the halogen atom is attached to a carbon which is further attached to how many carbon atom:
a. One
b. Two
c. Four
d. Three
70. The reactivity order of alkyl for a particular alkyl group is:
a. Iodide>Bromide>Chloride>Fluoride
b. Fluoride>chloride>Bromide>Iodide
c. Bromide>Iodide>Chlori
d. Chloride>Bromide>Fluoride>Iodide
71. When CO2 is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is:
a. Propanal
b. Propane
c. Propanol
d. Propanoic acid
72. Grignard reagent is reactive due to:
a. The polarity of C-Mg bond
b. The percentage of halogen atom
c. The presence atom of Mg atom
d. None of these
73. Sn2 reactions can not be best carried out with:
a. Tertiary alkyl halides
b. Primary alkyl halides
c. All the three
d. Secondary alkyl halides
74. Elimination biomolecular reactions involve:
a. Third order kinetics
b. 1 Order kinetics
c. Zero order kinetics
d. Second order kinetics
75. For which mechanism, the first step involved is the same:
a. Sn I and E2
b. EI and E2
c. E1 and Sn1
d. E2andSn2