Pathak’s Academy Spectrum 2024
Topics: Chapters 10,11
Marks: 25 Time: 1h
Section - A
Q.No. 1 : Select and write the correct answer (any 5) [05]
i) Which of the following is used as source of dichlorocarbene
a. Tetrachloromethane b. Chloroform c. iodoform d. DDT
ii) Resorcinol on distillation with zinc dust gives
A. Cyclohexane B. Benzene C. Toluene D. Benzene-1, 3-diol
iii) The best method for preparation of alkyl fluorides is
a.Finkelstein reaction b.Swartz reaction c.Free radical fluorination d. Sandmeyer's reaction
iv) Identify the chiral molecule from the following.
a. 1-Bromobutane b. 1,1- Dibromobutane c. 2,3- Dibromobutane d. 2-Bromobutane
v) Anisole on heating with concentrated HI gives
A.Iodobenzene B.Phenol + Methanol
C. Phenol + Iodomethane D.Iodobenzene + methanol
vi) Ethers are kept in air tight brown bottles because
A. Ethers absorb moisture B. Ethers evaporate readily
C. Ethers oxidise to explosive peroxide D. Ethers are inert
vii) Choose the compound from the following that will react fastest by SN1mechanism.
a. 1-iodobutane b. 1-iodopropane c. 2-iodo-2 methylbutane d. 2-iodo-3-methylbutane
Section - B
Attempt any 5 [5 x 2 = 10 M]
i) Haloarenes are less reactive than halo alkanes.give reason
ii) Hydroboration-oxidation of propene gives.....
iii) Write structure of optically active alcohol having molecular formula C4H10O
iv) Arrange the following in the increase order of boiling points
a. 1-Bromopropane b. 2- Bromopropane c. 1- Bromobutane d.1-Bromo-2-methylpropane
v) Distinguish between - SN1 and SN2 mechanism of substitution reaction ?
vi) Explain why phenol is more acidic than ethyl alcohol.
Section - C
Attempt any Two. [3 x 2 = 6 M]
i)Write structural formulae for
a. 3-Methoxyhexane b. Methyl vinyl ether c. 1-Ethylcyclohexanol
ii) Match the pairs.
Column I Column II
a. CH3 CH-CH3 i. vinyl halide
X
b. CH2=CH-CH2X ii. alkyl halide
c. CH2=CH-X iii. allyl halide
iv. benzyl halide
v. aryl halide
iI) Explain why p-nitrophenol is a stronger acid than phenol.
iii) Convert the following.
i. Propene to propan-1-ol ii. Benzyl alcohol to benzyl cyanide iii. Ethanol to propane nitrile
Section - D
Attempt any One. [1 x 4 = 4 M]
i) Give the reagents and conditions necessary to prepare phenol from
a. Chlorobenzene b. Benzene sulfonic acid.
ii) Give the equations of the reactions for the preparation of phenol from isopropyl
benzene.
