Hydrocarbon Level :I KVPY
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1. The main product of dehydrohalogenation of 2-iodobutane is
(A) 1-butene (B) 2-butene
(C) n-butane (D) A and B equally
2. Anti Markownikov addition takes place in which of the following reactions
(A) CH3CH = CH2 + HBr 2
5 2 2 ( C H CO) O
(B) CH2 = CH –CH2Cl + HCl
Peroxide
(C) CH2 = CH - CH2OH + HCl
Peroxide
(D) CH2 = CH - CH2CH2CH2CH2OH + HCl
Peroxide
3. Which reacts fastest with conc. HCl
(A) (B)
CH CH OH 2 2 CH – CH3
OH
(C) CH3 (D) CH2 = CH –OH
CH3 – C – OH
CH3
4.
B
BH3 / THF
CH2 3
H O
A
H2O 2 / OH
A and B are
(A) (B)
both CH2OH both CH3
OH
(C) (D)
CH2OH, CH3 CH3 CH2OH,
OH OH
5.
CH2OH on dehydration with conc. H2SO4 forms predominantly:
(A) (B)
CH2 CH3
(C) (D) CH3
CH3
6. Which of the following will react with sodium metal?
(A) Ethene (B) Butyne-1
(C) Butyne-2 (D) Ethane
7. On being heated with alcoholic potassium hydroxide, neopentyl bromide gives mainly.
(A) 2-methyl-2-butene (B) 2-methyl-1-butene
(C) 2-butene (D) 2,2-dimethyl-1-butene
8. Treatment of a mixture of 1-chloropropane and 2-chloropropane with alcoholic KOH gives
(A) 1-propene (B) 2-propene
(C) isopropylene (D) none of these
9. The reaction HC CH CH2ClCHO takes place in
(A) HC CH
HOCl
(B) HC CH
HCl
peroxide
(C) HC CH
Cl2
(D) HC CH
Cl2
oxidizing agent
10. C3H8 + Cl2 C3H7Cl + HCl is an example of
light
(A) Substitution (B) Elimination
(C) Addition (D) Rearrangement reaction
11. How many types of carbon atoms are present in 2, 3, 3-trimethyl pentane?
(A) One (B) Two
(C) Three (D) Four
12. The order of stability of the alkenes
R2C CR2 , R2C CHR, R2C CH2 , RCH CHR, RCH CH2 is
(I) (II ) (III ) (IV ) (V)
(A) I II III IV V (B) I = II III IV V
(C) II I IV III V (D) V IV III I II
13. 2-butyne + NaNH2 X + NH3, X will be
Paraf f in
(A) sodium salt of 2-butyne (B) sodium salt of 1-butyne
(C) 2-butyne (D) 1-butyne
14. Which of the following has least restricted rotation around carbon carbon bond?
(A) Ethane (B) Ethylene
(C) Acetylene (D) Hexachlorohexane
15. A mixture of ethyl bromide and n-propylbromide is subjected to Wurtz reaction. The
hydrocarbon that will not be formed is
(A) n-butane (B) n-propane
(C) n-pentane (D) n-hexane
16. Natural gas is composed primarily of
(A) Methane (B) n-butane
(C) n-octane (D) a mixture of octanes
17. The highest boiling point is expected for
(A) Isooctane (B) n-octane
(C) 2, 2, 3, 3-tetramethylbutane (D) n-butane
18. The total number of structural isomers possible for structure C3H6 are
(A) 1 (B) 2
(C) 3 (D) 4
19. Anti Markownikoffs addition of HBr is not observed in
(A) Propene (B) Butene
(C) Butene-2 (D) Pentene-2
20. Propene, CH3CH=CH2 can be converted into 1-proponol by oxidation. Which set of
reagents among the following is ideal to effect the conversion
(A) alkaline KMnO4 (B) B2H6 & alk H2O2
(C) O3 (Zn Dust) (D) O2O4/CHCl3
