Haloalkanes And Haloarenes(General Knowledge > General Science ) Questions and Answers

Question 1. Which of the following is a chiral molecule?
  1.    CH2BrI
  2.    CH3CBr2Cl
  3.    (CH3)2CHCl
  4.    CH3CHBrCH2CH3
Explanation:-
Answer: Option D. -> CH3CHBrCH2CH3
Question 2. The number of structural isomers of formula C4H9Br is
  1.    2
  2.    3
  3.    4
  4.    5
Explanation:-
Answer: Option C. -> 4
Question 3. The reaction:CH3Br + AgF → CH3F + AgBr is called
  1.    Swarts reaction
  2.    Finkelstein reaction
  3.    Gattermann reaction
  4.    Perkin reaction
Explanation:-
Answer: Option A. -> Swarts reaction
Question 4. Complete the following reaction R-X + KNO2 → A + KXA is
  1.    RNO2
  2.    RONO
  3.    RNO
  4.    RNO3
Explanation:-
Answer: Option B. -> RONO
Question 5. Assertion (A): Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols
  1.    Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
  2.    Assertion and Reason both are correct statements but Reason is not the correct explanation of Assertion.
  3.    Assertion is correct but Reason is wrong.
  4.    Assertion and Reason both are wrong statements
Explanation:-
Answer: Option D. -> Assertion and Reason both are wrong statements
Question 6. Which of the following will have maximum boiling point?
  1.    C3H7Br
  2.    C3H7F
  3.    C3H7Cl
  4.    C3H7I
Explanation:-
Answer: Option D. -> C3H7I
Question 7. Assertion: Electron withdrawing groups in aryl halides increases the reactivity towards nucleophilic substitution
  1.    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  2.    Both assertion and reason are true but reason is not the correct explanation of the assertion
  3.    Assertion is true but reason is false
  4.    Assertion is false but reason is true.
Explanation:-
Answer: Option B. -> Both assertion and reason are true but reason is not the correct explanation of the assertion
Question 8. The reaction:R – Cl + KI → RI + KCl (in presence of acetone)Is known as
  1.    Hunsdieker reaction
  2.    Finkelstein reaction
  3.    Ulmann reaction
  4.    Wurtz reaction
Explanation:-
Answer: Option B. -> Finkelstein reaction
Question 9. which among MeX, RCH2­X , R2CHX and R3CX is most reactive towards SN2 reaction
  1.    MeX
  2.    RCH2­X
  3.    R2CHX
  4.    R3CX
Explanation:-
Answer: Option A. -> MeX
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