MULTIPLE 0-1010E QUESTIONS

1. I. Acetylene II. Cyclopropane Ill. Cis-2-butene In which of the compounds given above do
the carbon atoms undergo only sp hybridization?
A I only 8) II only C) Ill only D) I and II E) I, II and III

2. Which of the given acyclic compounds can decolonze bromine water? I. C61110 II. C41-420
III. C61110
A) I only
B) II only C) I and II D I and III E) I, II arid Ill

3. The names of three compounds are given below. I. CH3- C a C - CH3 2 • • butyne
IL CH3- C =CH 2 propyne
CH - CH - CH3 CH3 Which ol them is/are named correctly?
A) I only B) II only D) I and III
2 - methyl -3 - butync
E) II and III
C) I and II

4. I. Acetylene II. 1,3 - pentadiene III. 2 - butene If we have I mole of each of the compounds
above. to which one(s) can 2 moles of H2 be added?
A) I only B) II only C I and II D)11 and III E) I. II and III

5. A 30 I. of mixture of C2112 and CAI, Is saturated with 50 L of H2. What Is the mole
percentage of acetylene In the mixture?
A) 25% B) 50% C) 75% D) 33% E 67%
6. Which one of the given compounds below will not change the color of bromine water?
A) C2H2 B) C2114 C) C3H, D CH, E) C3H6

7. CI i3 - C - CII3 CH2 == CH CH mak CI-12 2 moles of Br2 Is added to one mole ol each ol
above compounds. Which property Is/are the same for the reaction products? I. Molecular
formula II. Molecular weight III. Structural formula
A) I only B) II and III C) I and III D l and II E)IItandIll

8. Propyne is saturated with an excess of Heir. What is the name of the product?
A2.2-dibromopropane B) 2.2-dibromopropane C) 2.2-dibromopropene D) 2-bromopropene E)
propane
9. I. If water is added to ethylene. ethyl alcohol is produced. II. If water is added to acetylene. acetaldehyde
(ethanol) is produced. III. If water is added to propyne. &methyl ketone (2-propanone) is produced. Which of
the above statements isfore correct?
A) I only 13) I and II C) II and III D) I and Ill F I. 11 and III

10. CH3 -C C -No -- CH3 -0 -> Which one of the names below is the correct hydrocarbon produced in this
reaction?
A 2-butyne B) 1-butyne C) 2-butene D) Butane Propyne

11. With ammoniacal AgNO3 solution; I. H-C=C-H IL CH3 -C=C -H 111. CH3 -C =C -CH3 which of the above
undergoes a reaction?
A) I only B I and II D)111 only C)11 and E) I, II and III

Wnen 11 grams of a mixture of C21-16, C2H, and C2H2 gases is passed through ammoniacal AgNO3 solution. 12
grams of silver acetylide precipitates. The remaining alba:re is passed through brominated water and 24 grams
of Br2 is used up. What is the mass percentage of C2H6 in the mixture? (1-1: 1. C:12. Br : 80, Ag : 108)
A) 25 B) 35 C 50 D) 60 E) 75

13. For the compound CH3 - CH2 - C = CH I. It undergoes a reaction with ammoniacal AgNO3 solution. II. It
decolorizes bromine water. III. It undergoes an addition reaction with hydrogen. Which of the above
statements isiare correct?
A) I only B) II only C) III only D)land II E) 1,11,111

1. For benzene: I. It is an aromatic compound. II. Its empirical formula is 01. III. It contains 3 it and 12 0 bonds.
Which of the above statements is/are correct?
A) I only B) II only C) I and III D) II and III E I, II and III

2. Which of the following pairs of compounds are isomers?

A) I only D II and III
B) I and 11 C) I and III E) I, II and III
3. All of the following react with benzene except: A Water B) Nitric acid C) Bromine D) Sulfuric
acid E) Methyl chloride

4.
Which of the above compounds is/are aromatic?
A) I only II and III
B) II only C) I and II E) I. II and Ill D) II AND III

5. Which of the following is correct for the benzene molecule?

A) It contains 12 hydrogen atoms. B It is unsaturated. C) The carbon-carbon bonds are single. D)
The carbon-carbon bonds are double. E) It has an acyclic structure.

6. All of the followings are isomers of each other except

7. I. Its molecular formula is Ci0H8. II. Hydrogen can be added to it at room temperature. III. It is an aliphatic
hydrocarbon. Which of the above statements is/are correct for naphthalene?
A I only B) II only C) III only D I and II E) land III

AROMATICS

3.Draw the structural formula of the compounds

toluene
nitrobenzene

m-chlorophenol

p-dichlorobenzene
o-ethylnitrobenzene

1-bromo-2methyl-3- o-chloro-phenylpropane
phenylcyclohexane

1,3-dichloro-5-isopropylbenzene trihenylmethane
4. draw the structural formulae and give the names of isomers of aromatic c8H10
5. Write the combustion reactions
a. 2C6H6 + 1502 —› 12CO2 + 6H20 benzene
b. C7H8 + 902 7CO2 + 4H20 toulene
c. C,0H8 + 1202 —> 100O2 + 4H20 naphthalene
d. 2Ci4H10 + 3302 --> 28CO2 + 10H20 antharacene
2.Name the following compounds

phenol toluene aniline

1-hydroxy-4-
1,3- dichbrobenzene 2,4,6-trinitoulene nethylbenzene

8 Propose a method to check whether a compound benzene, hexene or hexane?

Bromine water
9. Find the volume of hydrogen (at STP) necessary tb saturate 15.6 grams of benzene?
13.44 L
10. 750 ml NaOH solution is reacted with excess sodium beruoate to produce 23.4 grams of benzene. What is
the molarity of the NaOH solution?
0.4 M
11. By using the Friedel - Crafts method, 26.5 gssss)l5161 benzene is produced from 0.25 mol of benzene.

C2H5 Deterrnine the structure of the produced benzene

derivative.

12. Find the mass of benzene that is obtained from the acetylene that takes up a volume of 13.44 L at STP The
yield of the reaction is 80%.
12.48g
ALKYNES
1. I mole of a hydrocarbon contains 3 moles of sigma and 2 moles of pi bonds. Write down the
formula of this compound.
C=C
2. What is the molecular formula of an alkyne of which 0.63 grams contains 0.07 grams of H?
C4H6
3. CH3 —C —CH = CH2 What are the types of hybridizations undergone by the carbon atoms in
this compound?
sp3 - sp2 - sp2 - sp – sp
4. name the
following
compounds using
the system
Acethylene

4-bromo-3methyl-1pentyne

4,4-dichloro-3,3dimethyl-1-pentyne
5. Write down the structural formulae of the compounds
 9. 2.24 L H2 at ST➢ is needed to saturate 2 grams of an alkyne. What is the molecular formula?
C3H4
10. 0.7 mole of a butene and butene is saturated by 22.4 H2 at STP. At the end there is only
butane gas left. What was the mass of the Initial mixture?
38.6g
I I. 0.3 mole of Br2, is used to saturate a equal mixture of ethylene and acetylene. What is the
mass of acytelene in this mixture?
2.6g

12. There are propane ethylene and acetylene in separate containers.

13. Propose a method to differentiate the compounds butyne. 1.3 - butadiene and butane gas
which are stored in three different containers.
Decrease the temp butyne boils, after butane and the butadine

14. 28 liters of CO, at SIP is released by burning 0.25 mole of an alkyne. According to this
information:
a. What is the molecular formula of the alkyne? C5h8
b. What volume of air at STP is used in the combustion reaction? (21% of air is oxygen by volume)
186.7L
C. How many grams of H2O are produced? 18g

15. Is a: the mass of the combusted elf,equ l'at is the molecular formula of the alkyne? whVThat
is the volume ratio of CO2 produced to 02 consumed (assuming the same conditions)?
a.C4H6
b.8/11
16. What is the molecular formula of an alkyne if 13.44 liters of CO2 at STP and 5.4 grams of H2O
is produced after it is burned?
C2H2
17. When 20 cm of a hydrocarbon and 100 cm3 of oxygen is burned, 20 cm3 of oxygen gas
remains in excess auniar 6° cm3 of CO2 is produced. What is the molec formula of the
hydrocarbon?
C3H4
18. When a mixture containing equal moles of ethylene and acetylene, is passed through
ammoniacal silver nitrate solution. 36 grams of a white precipitate is formed in the container.
What is the volume of the initial gas mixture at STP? (H 1, C: 12, Ag : 108)
6.72L
19. What is the name and mass of the alkyne that is produced by the reaction Al 14.4 grams of
sodium acetylide with an excess of ethyl bromide?
1-butyne, the mass is 16.2g
20. 0.2 mole of KOH and an excess amount of 1.2 - dichloro ethane are reacted together in the
presence of alcohol. How many liters of air is needed to burn the product of this reaction at STP?
26.7 L
21. How would you carry out the following transformations. C —> CaC2 —> C2H2 —> C2H^ —^
C02
Cao+3C = CaC2+CO
CaC2+H20 = C2H2 + Ca(OH)2
C2H2 + H2 = C2H4
C2 + 02 = CO2 + H20
22. Write the equations of the reactions that take place between the following pairs
a. Acetylene and Oxygen - 2C2H2(g)+5O2(g)→4CO2(g)+2H2O(g)
b. 2-butyne and hydrogen
R-C≡C-R   +   H2   &   Lindlar catalyst   ——>  cis R-CH=CH-R
R-C≡C-R   +   2 Na   in   NH3 (liq)   ——>  trans R-CH=CH-R   +   2 NaNH2

c.