1. The gas liberated by the electrolysis of Dipotassium succinate solution is :
(1) Ethyne
(2) Ethene
(3) Propene
(4) Ethane
Solution:
The correct option for the given question is (2).
2. Which one of the following classes of compounds is obtained by polymerization of acetylene?
(1) Poly-ene
(2) Poly-yne
(3) Poly-amide
(4) Poly-ester
Solution:
The correct option for the given question is (2).
3. One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is:-
(1) Ethene
(2) Propene
(3) 1-Butene
(4) 2-Butene
Solution:
The correct option for the given question is (4).
4. Which branched chain isomer of the hydrocarbon with molecular mass 72 u gives only one isomer of mono substituted alkyl halide?
(1) Neopentane
(2) Isohexane
(3) Neohexane
(4) Tertiary butyl chloride
Solution:
The correct option for the given question is (1).
5. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of:-
(1) an isopropyl group
(2) an acetylenic triple bond
(3) two ethylenic double bonds
(4) a vinyl group
Solution:
The correct option for the given question is (3).
6. In the given transformation, which of the following is the most appropriate reagent?
(1) NaBH4
(2) NH2-NH2, OH
(3) Zn – Hg / HCl
(4) Na, Liq.NH3
Solution:
The correct option for the given question is (2).
7. The number and type of bonds in C22- ion in CaC2 are:
(1) Two σ bonds and one π – bond
(2) Two σ bonds and two π – bonds
(3) One σ bond and two π – bonds
(4) One σ bond and one π bond
Solution:
The correct option for the given question is (3).
8. In the hydroboration – oxidation reaction of propene with diborane, H2O2 and NaOH, the organic compound formed is :
(1) CH3CH2CH2OH
( 2) (CH3)3COH
(3) CH3CHOHCH3
(4) CH3CH2OH
Solution:
The correct option for the given question is (1).
9. Which one of the following has the minimum boiling point?
(1) n-Butane
(2) 1-Butyne
(3) 1-Butene
(4) Isobutene
Solution:
The correct option for the given question is (4).
10. The gas evolved on heating CH3MgBr in methanol is
(1) methane
(2) ethane
(3) propane
(4) HBr
Solution:
The correct option for the given question is (1).
11. The reagent needed for converting
is
(1) H2 / lindlar Cat.
(2) Catalytic Hydrogenation
(3) LiAlH4
(4) Li/ NH3
Solution:
The correct option for the given question is (4).
12. In the presence of peroxide, HCl and HI do not give anti-Markovnikov’s addition to alkenes because
(1) All the steps are exothermic in HCl and HI
(2) One of the steps is endothermic in HCl and HI
(3) HCl is oxidizing and the HI is reducing
(4) Both HCl and HI are strong acids
Solution:
The correct option for the given question is (2).
13. Polysubstitution is a major drawback in
(a) Reimer-Tiemann reaction
(b) Friedel-Crafts acylation
(c) Friedel-Crafts alkylation
(d) Acetylation of aniline.
Solution:
The correct option for the given question is (3).
14. Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
(1) Ethyl acetate
(2) Acetic acid
(3) Acetamide
(4) Butan-2-one
Solution:
The correct option for the given question is (4).
15. The hydrocarbon which can react with sodium in liquid ammonia is
(1) CH3CH2C ≡ CCH2CH3
(2) CH3CH2CH2C ≡ CCH2CH2CH3
(3) CH3CH2C ≡ CH
(4) CH3CH ≡ CHCH3
Solution:
The correct option for the given question is (3).
