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Practice each question, then open the answer or worked solution.
Arrange the following in decreasing order of their boiling points.
(A) n–butane (B) 2–methylbutane
(C) n-pentane (D) 2,2–dimethylpropane
(i) A > B > C > D
(ii) B > C > D > A
(iii) D > C > B > A
(iv) C > B > D > A
Option (iv) is the answer.
Arrange the halogens F2 , Cl2 , Br2 , I2 , in order of their increasing reactivity
with alkanes.
(i) I2 < Br2 < Cl2 < F2
(ii) Br2 < Cl2 < F2 < I2
(iii) F2 < Cl2 < Br2 < I2
(iv) Br2 < I2< Cl2 < F2
Option (i) is the answer.
The increasing order of reduction of alkyl halides with zinc and dilute HCl is
(i) R–Cl < R–I < R–Br
ii) R–Cl < R–Br < R–I
(iii) R–I < R–Br < R–Cl
(iv) R–Br < R–I < R–Cl
Option (ii) is the answer.
The correct IUPAC name of the following alkane is
Option (i) is the answer.
The addition of HBr to 1-butene gives a mixture of products A, B and C
The mixture consists of
(i) A and B as major and C as minor products
(ii) B as major, A and C as minor products
(iii) B as minor, A and C as major products
(iv) A and B as minor and C as major products
Option (i) is the answer.
. Which of the following will not show geometrical isomerism?
Option (iv) is the answer.
Arrange the following hydrogen halides in order of their decreasing reactivity
with propane.
(i) HCl > HBr > HI
(ii) HBr > HI > HCl
(iii) HI > HBr > HCl
(iv) HCl > HI > HBr
Option (iii) is the answer.
Arrange the following carbanions in order of their decreasing stability.
(A) H3C – C ≡ C– (B) H – C ≡ C– (C) H3C-CH–2
(i) A > B > C
(ii) B > A > C
(iii) C > B > A
(iv) C > A > B
Option (ii) is the answer.
Arrange the following alkyl halides in decreasing order of the rate of
β– elimination reaction with alcoholic KOH.
(i) A > B > C
(ii) C > B > A
(iii) B > C > A
(iv) A > C > B
Option (iv) is the answer.
Which of the following reactions of methane is incomplete combustion:
Option (iii) is the answer.
II. Multiple Choice Questions (Type-II)
In the following questions, two or more options may be correct.
Some oxidation reactions of methane are given below. Which of them is/are
controlled oxidation reactions?
(i) CH4 (g) + 2O2 (g)→ CO2 (g) + 2H2O (l)
(ii) CH4 (g) + O2 (g) → C (s) + 2H2O (l)
(iii) CH4 (g) + O2 (g) →(Mo O2 3) HCHO + H2O
(iv) 2CH4 (g) + O2 (g) → (Cu/523/100 atm) 2CH3OH
Option (iii) and (iv) are the answers.