Haloalkanes And Haloarenes Test

Haloalkanes And Haloarenes

This is haloalkanes and haloarenes Test-03 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Necessary conditions for any system to be aromatic:
  • A
    it should have 2, 6,10,14 pi electrons
  • B
    it should have a single cyclic cloud of delocalized pi electrons above and below the plane of the molecule
  • C
    It should be planner
  • D
    all the below
    Correct
2
Boron is unable to form $B{F_6}^-$ ion.
  • A
    Due to absence of d orbital
    Correct
  • B
    the atomic mass of Fluorine is large
  • C
    None of the above
  • D
    the atomic mass of Fluorine is small
3
Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is
  • A
    Nucleophilic substitution reaction
  • B
    Electrophilic substitution reaction
    Correct
  • C
    Free radical addition reaction
  • D
    Electrophilic elimination reaction
4
p,p’ – Dichlorodiphenyltrichloroethane is a
  • A
    degreasing agent
  • B
    antiseptic drug
  • C
    Pesticide
    Correct
  • D
    Refrigerant
5
Tetrachloromethane (Carbon tetrachloride)is
  • A
    antiseptic drug
  • B
    Pesticide
  • C
    degreasing agent
    Correct
  • D
    Refrigerant
6
Triiodomethane (Iodoform) is
  • A
    degreasing agent
  • B
    Refrigerant
  • C
    Pesticide
  • D
    antiseptic drug
    Correct
7
The most common freons in industrial use is manufactured by
  • A
    Wurtz reaction
  • B
    by Swarts reaction
    Correct
  • C
    Fittig reaction
  • D
    Sandmeyer reaction
8
Dichloromethane (Methylene chloride) is
  • A
    pesticide
  • B
    refrigerant
  • C
    degreasing agent
  • D
    a solvent
    Correct
9
Freons diffuses unchanged into the stratosphere. It can
  • A
    damages the natural ozone balance.
  • B
    initiate radical chain in the stratosphere reactions
  • C
    Because freons diffuses unchanged into the stratosphere so cannot cause depletion ofozone layer.
  • D
    Answers B and C
    Correct
10
Chloroform is in closed dark coloured bottles completely filled
  • A
    None of the above
  • B
    in the presence of light forms an extremely poisonous gas
  • C
    slowly oxidised by air in the presence of light
  • D
    Both B and C
    Correct
11
Anisole reacts with a mixture of concentrated sulp52712huric and nitric acids to yield a mixture of ortho and paranitroanisole
Question 11 figure 1
  • A
    major product is paranitroanisole
    Correct
  • B
    None of the above.
  • C
    minor product is orthonitroanisole
  • D
    ortho and para in equal amounts.
12
Carbon tetra chloride has a dipole moment
  • A
    μ = 2
  • B
    μ= 1
  • C
    μ= 4
  • D
    μ= 0
    Correct
13
A hydrocarbon C5H10 does not react with chlorine in dark but gives a single monochloro compound $C_5H_9C$l in bright sunlight. The hydrocarbon is
  • A
    None of the above
  • B
    Cyclopentene
  • C
    Cyclopentane
    Correct
  • D
    Cycloalkyne
14
Liver when chronically exposed to chloroform gets damaged because
  • A
    Both B and D
    Correct
  • B
    chloroform gets converted to carbonyl chloride which is poison
  • C
    chloroform is metabolised to phosgene in the liver
  • D
    chloroform is not metabolised in the liver
15
Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?
  • A
    Neohexane
  • B
    Neopentane
    Correct
  • C
    Isohexane
  • D
    Tertiary butyl chloride