Chap 7 (2nd year)
1. The state of hybridization of carbon atom in
methane is
(A) Sp3 (B) Sp2
(C) Sp (D) dsP2
2. In t-butyl alcohol, the tertiary carbon is bonded to
(A) Two hydrogen atoms
(B) Three hydrogen atoms
(C) One hydrogen atoms
(D) No hydrogen atoms
3. Which set of hybrid orbitals has planar triangular shape
(A) Sp3 (B) Sp
(C) Sp2 (D) dsp2
4. The chemist who synthesized urea from ammonium cyanate was
(A) Berzelius (B) Kolbe
(C) Wholer (D) Lavoisier
5. Linear shape is associated with which set of hybrid orbitals ?
(A) Sp (B) Sp2
(C) Sp3 (D) dsp2
6. A double bond consists of.
(A) Two sigma bond
(B) One sigma and one pi bond
(C) One sigma and two pi bond
(D) Two pi-bond
7. Ethers show the phenomenon of
(A) Position isomerism
(B) Functional group isomerism
(C) Metamerism
(D) Cis-trans isomerism.
8. Select from the following the one which is alcohol.
(A) CH3 --------CH2--------OH
(B) CH3---------O-----------CH3
(C) CH3COOH
(D) CH3--------CH2--------Br
9. Early chemists recognized organic compounds
distinct from inorganic compounds because of
(A) The difference in their origin and
properties
(B) The similarities in their origin but
difference in their propertied
(C) Both of the above
(D) None of the above
10. The vital force theory was rejected by
A) Jhon Dalton B) Friedrick Wohler
C) Dmitri Mendeleev D) None of the above
11. We have become dependent for our food
medicines and clothing to which compounds.
(A) Inorganic compounds
(B) Organic compounds
(C) Both of the above
(D) None of the above
12. Natural Gas is a
(A) Mixture of hydrocarbons
(B) Methane
(C) Both of the above
(D) Nonn of the above
13. In Pakistan the natural gas is used for.
(A) For power generation only
(B) In coment and fertilizer industries only
(C) As a fuel in general industries and for
domestic purposes
(D) All of the above are truce
14. At what temperature coal is heated in the observe of air for converting it into coke, coal
gas, and coal tar
(A) Temperature ranging from 500-1000oC
(B) Temperature ranging from 100-1000oC
(C) Temperature ranging from 300-2000oC
(D) Temperature ranging from 1000-3000oC
15. Cracking of petroleum is taken place by
A) Thermal cracking B) Catalytic cracking
C) Steam cracking D) All of the above
16. The structure of alkynes can be explained by yet another mode of hybridization called as
(A) Sp2 hybridization
(B) Sp3 hybridization
(C) Sp5 hybridization
(D) Sp hybridization
17. Metamerism aries due to the.
(A) Equal distribution of carbon atoms
(B) Unequal distribution of carbon atoms
(C) Both of the above are true
(D) None of the above are true
18. Cis-trans isomerism is also called as
(A) Geometric Isomerism
(B) Position Isomerism
(C) Chain Isomerism
(D) Metamerism
19. Coal, petroleum and natural gas are important
sources of.
(A) Organic compounds
(B) Inorganic compounds
(C) Both of the above
(D) None of the above
20. Organic compounds are classified into
(A) Acyclic and cyclic compound
(B) Acyclic & Heterocyclic
(C) Non-cyclic
(D) All of the above
21. Rate of reactions of most organic compounds
are___________
a) Very slow
b) Very fast
c) Medium
d) No regular character present
22. Coal is produced after a long time decay of
__________
a) Animals b) Fossils
c) Wood d) Ores
23. Ether functional group can be represented
as____________
a) –OH b) R-CO-R
c) R-O-R d) R-COOH
24. 2-propanol can show isomerism as _______
a) Metamerism
b) Functional group isomerism
c) Geometric isomerism
d) None of above
25. The hydrocarbons which give smoke on burning is called________
a) Aliphatic b) Aromatic
c) Carboxylic acid d) Aldehydes
26. In sp3 hybridization, the geometry of molecules will be_________
a) Square planar b) Trigonal pyramidal
c) Tetrahedral d) All are possible
27. Only sigma bonds are present in _______
a) Propene b) Butanoic acid
c) Butanal d) Ethoxy butane
28. In alkyne, the hybridization is____________
a) sp2 b) sp
c) sp d) All
29. Octane no. of any fuel can be improved by ______
a) Pyrolysis b) Reforming
c) Polymerization d) Condensation
30. The fuel having 40% n-heptane & 60% iso-octane will have octane number
a) 40 b) 60
c) 80 d) 90
31. Which of them is heterocyclic organic compound?
a) Benzene b) Cresol
c) Naphthalene d) Pyridine
32. Which one is the mixture of 215 organic compounds?
a) Water gas b) Coal gas
c) Coal tar d) Crude coal gas
33. Octane number is the percentage of
a) n-pentane in a mixture
b) n-butane in a mixture
c) n-hexane in a mixture
d) 2, 2, 4 – trimethyl pentane in a mixture
34. During the fractional distillation of petroleum, paraffin oil boils between the ranges
a) 25oC b) 40 – 180oC
c) 175 – 275oC d) 220 – 350oC
35. The octane number of gasoline may increased by adding
a) EDTA b) NaOH
c) AgNO3 d) PB(C2H5)4
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