Alkyne(General Knowledge > General Science ) Questions and Answers

Question 1. The general formula of Alkyne is
  1.    CnH(2n-2)
  2.    CnH2n
  3.    CnH2n+2
  4.    CnHn+2
Explanation:-
Answer: Option A. -> CnH(2n-2)
Question 2. Give the name of this compound, C3H8
  1.    Propane
  2.    Butene
  3.    Both A & B
  4.    None of these
Explanation:-
Answer: Option A. -> Propane
Question 3. General formula for alkanes
  1.    CnH2n
  2.    CnH2n+1
  3.    CnH2n+2
  4.    CnH2n-2
Explanation:-
Answer: Option C. -> CnH2n+2
Question 4. Which reagent is needed to change CH3CH=CH2 to CH3CHClCH3
  1.    Cl2 (aq)
  2.    SOCl2
  3.    PCl3
  4.    HCl
Explanation:-
Answer: Option D. -> HCl
Question 5. Reaction between butyne with H2O in the presence of HgSO4 and H2SO4 as catalyst will produce?
  1.    enol
  2.    alcohol
  3.    ketone
  4.    diol
Explanation:-
Answer: Option C. -> ketone
Question 6. What is the meaning of unsaturated hydrocarbon?
  1.    compound containing carbon atom and oxygen atom with single bond between carbon atoms
  2.    compound that contain carbon and hydrogen with multiple bond between carbon atoms
Explanation:-
Answer: Option B. -> compound that contain carbon and hydrogen with multiple bond between carbon atoms
Question 7. What is the prefix for a compound with 7 carbons?
  1.    Hex
  2.    Hept
  3.    Hesp
  4.    Hexa
Explanation:-
Answer: Option B. -> Hept
Question 8. Which of the following substances has the highest boiling point?
  1.    heptane
  2.    pentane
  3.    nonane
  4.    All of above
Explanation:-
Answer: Option C. -> nonane
Question 9. How many carbon atoms are in decane?
  1.    4
  2.    6
  3.    8
  4.    10
Explanation:-
Answer: Option D. -> 10
Question 10. We better used
  1.    Pd
  2.    Pt/BaSO4 in quinoline
  3.    Pt/CaCO3 in quinoline
  4.    Pd/BaSO4 in quinoline
Explanation:-
Answer: Option D. -> Pd/BaSO4 in quinoline
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