- The orth/para-drecting group among the following is
(a) COOH
(b) CN
(c) COCH3
(d) NHCOCH3 - When propyne is treatd with HgSO4/H2SO4 the product is (a) Propanol (b) Propanal (c) Propanone (d) Propanoic acid
- Which of these will not react w ith acetylene? (a) NaOH (b) Ammoniacal AgNO3 (c) Na (d) HCl
- The terminal carbon in butane is …………….. hybridized.
Sp2
Sp3
Sp
dSp
5. The Number of structural isomers for C6H14 is
(a) 3
(b) 4
(c) 5
(d) 6
6. The correct order of reactivity towards the electrophilic substitution of the compounds (i) aniline (ii) benzene (iii) nitrobenzene is
(a) III > II > I
(b) II > III > I
(c) I < II > III
(d) I > II > III
7. On mixing certain alkane with chlorine and irradiating it with ultraviolet light, one forms only one monochloro alkane. The alkane could be
(a) Neopentane
(b) Propane
(c) Pentane
(d) Isopentane
8. The number and type of bonds between two carbon atoms in CaC2 are
(a) One sigma (σ) and one pi (π) bonds
(b) One sigma (σ) and two pi (π) bonds
(c) One sigma (σ) and one and a half pi (π) bonds
(d) One sigma (σ) bond.
9. Out of the following which one has the least hindered rotation about carbon-carbon bond.
(a) Ethane
(b) Ethylene
(c) Acetylene
(d) Hexachloroethane
10. Which of the following compounds exhibits steroisomerism?
(a) 2-methyl butene-1
(b) 3-methyl butyne-1
(c) 3-methylbutanoic acid
(d) 2-methylbutanoic acid
11. Which of the following compounds will exhibit geometrical isomerism?
(a) 1-pheny 1-2-butene
(b) 3-phenyl-1-butene
(c) 2-phenyl-1-butene
(d) 1,1-diphenyl-1-propene
12. In the compound CH2 = CH – CH2 – CH2C = CH2 the C2 – C3 bond is of the type
(a) sp – sp²
(b) sp³ – sp³
(c) sp – sp³
(d) sp² – sp³
13. Which alkene on ozonolysis gives CH3CH2CHO and CH3COCH3?
(a) CH2 = CH CH = C(CH3)2
(b) CH3 CH2CH = CH CH2CH3
(c) CH3CH2 CH = CH – CH3
(d) (CH3)2 C = CH CH3
14. An organic compound on treatment with Br2 in CCl4 gives. bromo derivative of an alkene. The compound will be
(a) CH3 – CH = CH2
(b) CH2 – CH = CH – CH2
(c) CH ≡ CH
(d) CH2 = CH2
15. Photochemical Chlorination of alkane is initiated by a process of
Pyrolysis
Substittion
Homolysis
Peroxidation
16. Pi (π) bond is formed due to overlap of the unhybridized …………….. orbitals
S (c) d
P (d) f
17. A linear structure is obtained during sp hybridization as in ……………..
Alkane
Alkyne
Alkene
None
18. Solubility of alkenes …………….. with the increase in molecular mass.
Increases
Decreases
Remains same
Firs decrease then increase
19. The sp² hybrid orbitals have …………….. p-character.
100% (b) 66.67%
33.33% (d) 50%
20. Reaction of Br2 on cyclopentene gives
1,2 dibromocyclopentane
Cyclopentyle bromide
Cyclopentyle dibromide
No reaction
21. Octane number can be increased by
Addition of B.T.X
Addition of tetraethyl lead
Addition of more cycloalanes
All of the above
22. Which of the following is not a petroleum product?
Petrol (c) Bees wax
Paraffin wax (d) Kerosene
23. Tetrabromoethane on heating with Zn gives
(a) Ethyl bromide
(b) Ethane
(c) Ethene
(d) Ethyne
24. Butene-1 may be converted to butane by reaction with
(a) Pd/H2
(b) Zn – HCl
(c) Sn – HCl
(d) Zn – Hg
25. An organic compound has a triple bond and not double bond. It can be test by
(a) Bromine water
(b) Baeyer reagent
(c) Fehling solution
(d) Ar nonical silver nitrate