Download CYCLOALKANES, POLYMERS, ALCOHOLS AND ETHERS

CYCLOALKANES, POLYMERS, ALCOHOLS AND ETHERS
Home Assignment
1.
The tendency of cylopropane (I), Cyclobutane (II), cyclopentane (III) to form
addition compounds is in the order :
a) I > II > III
b) I = II > III
c) I > II = III
d) I = III > II
2.
The most strained cycloalkane is
a) Cyclopropane
c) Cyclopentane
b) Cyclobutane
d) Cyclohexane
3.
Cyclopropane and cyclobutane under go ving opening reactions with hydrogen
in the presence of nickel catalyst at 800c
and 2000 respectively to form
corresponding alkanes. This indicates that.
a)
Cyclopropane is more stable than cyclobutane.
b)
Cyclobutane is more stable than cyclopropane
c)
Both are equally stable.
d)
Stability can not be predicted.
4.
Identify the product ‘Y’ of the following reaction
CH2-CH2-COO
|
Ca
heat
X
(Zn-Hg + HCl)
CH2-CH2-COO
heat
a)
c)
Pentane
Cyclopentane
b)
d)
Cyclobutane
Cyclopentanone
5.
Which of the following is the most reactive cycloalkane?
a) cyclopropane
b) Cyclobutane
c) Cyclopentane
d) Cyclohexane
6.
The monomer unit of poly vinyl chloride has the formula :
a) CH2=CHCl
b) CHCl=CHCl
c) CH2=CH2
d) CH3-CH2Cl
7.
Bakelite is prepared by the reaction between :
a) Urea and formaldehyde
b) Ethylene glycol
c) Phenol and formaldehyde
d) Tetramethylene glycol
8.
In elastomer, intermolecular forces are :
a) Strong
b) Weak
c) Nil
d) None of these
9.
Nylon 66 is a polyamide obtained by the reaction of :
a) COOH(CH2)4COOH + NH2C6H4NH3-(p)
b) COOH(CH2)4COOH + NH2(CH2)6NH2
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Y
c) COOH(CH2)6COOH + NH2(CH2)4NH2
d) COOHC6H4COOH-(p) + NH2(CH2)6 NH2
10.
Which statement about polymers is not true?
a) They are macromolecules
b) They have simple repeating units
c) They have very high molecular masses
d) They are all made by chemists
11.
Natural rubber is a polymer of :
a) Butadiene
c) 2-methylbutadiene
12.
CF2 = CF2 is a unit of :
a) Teflon
b) Buna – S
Polyethene
Addition polymers include :
1. Polyamide
Polyester
a) 1 only
c) 2 and 3 only
b) Isoprene
d) Hexa-1, 3-diene
c) Bakelite
d)
13.
2. Polyethylene
3.
b) 2 only
d 1, 2 and 3
14.
Isopropyl alcohol on passing over heated copper at 3000C gives :
a) Propylene
b) Acetaldehyde
c) Acetone
d) Propane
15.
The entzyme that catalyses the conversion of glucose to ethanol is :
a) Zymase
b) Invertase
c) maltase
d) Diastase
16.
The boiling point of ethyl alcohol is much higher than that of dimethyl ether, though
both have same molecular mass. The reason for this is :
a) Ether is insoluble in water
b) Methyl group is present in ether
c) Ethyl alcohol has hydrogen bonding
d) The hydrogen of the O-H group is electronegative
17.
Maximum number of active hydrogen atoms are present in
a)
Acetic acid
b)
Methane
c)
Glycerol
d)
Methanol
18.
Which of the following alcohols are most soluble in water?
a) n-Bytyl alcohol
b) iso-Butyl alcohol
c) sec-Butyl alcohol
d) tert-Butyl alcohol
2
19.
20.
Which of the following is known as “wood spirit”.
a) CH3OH
b) C2H5OH
c) CH3-CH2-OH
d) CH3CH-CH3
Which of the following reactions will yield propan-2-ol. Select the right answer
from a, b, c and d
I.
CH2=CH-CH3 + H2O H+
II.
CH3-CHO
CH3 MgI/H2O
III.
CH2O
IV.
CH2= CH-CH3
a)
c)
I and II
III and I
C2 H5 MgI /H2O
Neutral KMnO4
b)
d)
II and III
II and IV
21.
When ethyl iodide is heated with dry silver oxide, it forms :
a) Ethyl alcohol
b) Diethyl ether
c) Silver ethoxide
d) Ethyl methyl ether
22.
Diethyl ether can be decomposed by :
a) HI
b) NaOH
c) H2O
d) KMnO4
23.
In Williamson’s synthesis, ethoxy ethane is prepared by
a)
Passing ethanol over heated Al2O3
b)
Heating sodium ethoxide with ethyl bromide
c)
Treating ethyl alcohol with excess of H2SO4 at 440K
d)
Heating ethanol with dry Ag2O
24.
Higher homologoues of ethers can be prepared from
a)
Alkyl halides
b)
Diazomehtane
c)
Grignard reagents
d)
None of these
25.
Diethyl ether is prepared by passing vapours of ethyl alcohol over heated
catalyst under high temperature and pressure. The catalyst is
a)
SiO2
b)
CuO
c)
Al2O3
d)
Ag2O
26.
Diethyl ether is obtained from ethyl alcohol
a)
In the presence of H2SO4 at 413 K
b)
In the presence of H2SO4 at 470 K
c)
In the presence of H2SO4 at 383 K
d)
In the presence of H2SO4 at 273K
27.
Lucas regent is :
a) Conc. HCl and anhydrous ZnCl2
b) Conc. HNO3 and hydrous ZnCl2
c) Conc. HCl and hydrous ZnCl2
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d) Conc. HNO3 and anhydrous ZnCl2
28.
Methanol is industrially prepared by :
a) Oxidation of CH4 by stream at 9000C
b) Reduction of HCHO using LiAIH4
c) Reaction HCHO with a solution of NaOH
d) Reduction of CO using H2 and ZnO-Cr2O3
29.
n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by which
reagent?
a) PCl5
b) Reduction
c) Oxidation with potassium dichromate
d) Ozonolysis
30.
An organic compound [A] reacts with sodium metal to form [B]. On heating with
conc. H2SO4 [A] and [B] give diethyl ether. Compound [A] and [B] are respectively.
a)
c)
31.
C2H5OH And C2H5ONa
CH3OH And CH3ONa
b)
d)
C2H5OH And C3H7ONa
C4H9OH And C4H9ONa
b)
d)
CH3 OH + (CH3)2-CHI
CH3-O-C I- (CH3)2
The major organic product in the reaction.
CH3-O-CH(CH3)2 + HI
a)
c)
CH3I + (CH3)2-CHOH
I CH2O CH(CH3)2
32.
Which of the following alcohols gives ketone on oxidation
a)
Ethyl alcohol
b)
Isopropyl alcohol
c)
Tertiary butyl alcohol
d)
Glycol
33.
Which of the following will not form a yellow precipitate on heating with an alkaline
solution of iodine?
a) CH3CH(OH)CH3
b) CH3CH2CH(OH)CH3
c) CH3OH
d) CH3CH2OH
34.
Ethylene oxide when treated with Grignard reagent yields :
a) Tertiary alcohol
b) Cyclopropyl alcohol
c) Primary alcohol
d) Secondary alcohol
35.
Oxygen atom in ether is
a)
Very active
b)
Replaceable
c)
Active
d)
Comparatively inert
Which can be used as a catalyst in an esterification reaction ?
1. NaOH
2. H2SO4
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
36.
37.
Which is not an example of an addition polymer?
a) Polyethylene
b) Polyethylene terephthalate
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c) Polystyrene
d) Polyvinyl chloride
38.
The conversion of glucose to ethanol is represented as :
X C6H12O6


y C2H5OH
+
Z CO2.
What are the coefficients x, y, z respectively, in the balanced equation?
a) 1, 2, 2
b) 1, 3, 3
c) 1, 1, 4
d) 2, 4, 2
39.
During dehydration of alcohols to alkenes by heating with conc. H2SO4, the initiation
step is :
a) Protonation of alcohol
b) Formation of carbocation
c) Elimination of water
d) Formation of an ester
40.
How many carbon bonds are in a molecule of 2-methyl-2-butanol?
a) 2
b) 3
c) 4
d) 5
41.
What are the most likely products in the reaction between CH3CH2CH2OH and HI?
a) CH2CH2CH2I and H2O
b) CH3CH2CH3 and HOI
c) CH3OH and CH3CH2I
d) ICH2CH2CH2OH and H2
42.
Which one of the following is used to make “non-stick” cook-wares?
a) Polystyrene
b) Poly (ethylene terephthalate)
c) Polytetrafluoroethylene
d) Poly (vinyl chloride)
43.
Which of the following is simple ether?
a) C6H5-O-CH3
b) CH3-O-C2H5
44.
An organic compound of molecular formula C4H10O does not react with sodium. With
excess of HI, it gives only one type of alkyl halide. The compound is :
a)
Ethoxy ethane
b) 2-Methoxy propane
c) 1-Methoxy propane
d) 1-Butanol
45.
is :
When diethyl ether is treated with chlorine, in the presence of light, the product formed
a) C2H5Cl
b) C2H6
c) MeOMe
c) CH3COCl
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d) C6H5-O-C2H5
d) (C2Cl5)2O
KEY ANSWERS for HOME ASSIGNMENT
1.
(a) Higher the instability, greater is the reactivity of cycloalkanes.
2.
(a) Cyclopropane has a bond angle of 600C. Hence angle strain is maximum in
cyclopropane.
3.
(b) Cyclobutane is more stable than cyclopropane
4.
(c) Cyclopentane
5.
(a) Cyclopropane has maximum angle strain. Hence it is the most reactive
cycloalkane.
6.
(a) PVC has the monomer CH2=CHCl (Vinyl chloride)
7.
(c) Phenol and formaldehyde undergo condensation polymerization under two
different conditions to give a cross linked polymer called bakelite.
8.
(b) Elastomers are the polymers having very weak intermolecular forces of attraction
between the polymer chain. The weak forces permit the polymer to be stretched.
9.
K
(b) nHOCO(CH2)4COOH + nH2N(CH2)6NH2 525


 [-C-(CH2)4-CO-NH-(CH2)6-NH-]n
Polymerisa tion
10.
(d) All are not made by Chemist.
11.
(b)
Polymerisation
N[CH2=CH-C=CH2]    [-CH2-CH=C-CH2-]
Natural rubber is a polymer of isoprene, CH2=C(CH3)CH=CH2 which is 2methylbutadiene.
12.
(a) nCF2 = CF2    [-CF2-CF2-]n
13.
(b) Polyethylene only
14.
Cu
(c) CH3-CH-CH3 
0
Polymerisation
CH3-CO-CH3
+
H2 .
300 C
Acetone
15.
(a) Zymase converts glucose into ethanol.
C6H12O6 Zymase
 2C2H5OH + 2CO2
16.
(c) Ethyl alcohol forms intermolecular hydrogen bonding while diethyl ether does not
form hydrogen bonding.
17.
(c) Glycerol has three – O-H bonds. Thus three active hydrogen atoms
18.
(d) Solubility of alcohol increases with branching.
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19.
(a) CH3OH is a component in pyrolingneous acid which is a fraction obtained by
destructive distillation of wood. Hence methanol is known as wood spirit.
20.
(a) I and II.
21.

(b) 2C2H5I + Ag2O 

C2H5-O-C2H5 + 2Agl.
Diethyllether
22.
(a) C2H5-O-C2H5 + HI 
 C2H5OH + C2H5I.
23.
(b) C6H5ONa + C2H5I
24.
(c) Grignard reagents react with chloro derivatives of ethers to form higher
homologues.
25.
(c) Al2O3 at 523K
26.
(a)
27.
(a) Equimolar mixture of Conc. HCl and anhydrous ZnCl2 (dehydrating agent) is
called Lucas reagent.
28.
(d) Water gas is mixed with half its volume of hydrogen. The mixture is compressed
to approximately 200-300 atmospheres. It is then passed over a catalyst (ZnO +
Cr2O3) at 3000C. methyl alcohol vapours are formed which are condensed.
ZnO  Cr2 O3
CO
+
2H2  
CH3OH

0
- NaI
C6H5OC2H5
300 C
Compressed gas
Methanol
29.
(c) Primary alcohol on oxidation give aldehyde which on further oxidation give
carboxylic acid whereas secondary alcohols give ketone.
30.
(a)
31.
(a)
32.
(b)
33.
(c) CH3OH does not have –CH(OH)CH3 grouping hence it will not form yellow
precipitate with an alkaline solution of iodine (haloform reaction).
34.
(c) Ethylene oxide when treated with Grignard Reagent gives primary alcohol.
35.
(d) The C-O bond has very little polarity and oxygen is comparatively inert.
36.
(b) Conc. H2SO4 only
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37.
(b) Polyethylene terephthalate
38.
(a) 1, 2, 2
C6H12O6 
 2C2H5OH + 2CO2
39.
(a) Protonation of alcohol
40.
(c) 4(C-C-) bonds.
CH3-C-CH2-CH3
41.
(a)
42.
(c)We know that polytetrafluoroethylene or reflon is a rough material, resistance to
heat and bad conductor of electricity. Therefore it is used for conating the cookware
to make them non-sticky.
43.
(c) As simple ether is a symmetrical ether. Example : CH3-O-CH3 (Both alkyl groups
should be same).
44.
(a)
45.
(d) C2H5-O-C2H5 + 10Cl2 
 (C2Cl5)2O + 10HCl
C2H5-O-C2H5 + 2HI 
 2C2H5I   2C2H6.
Re d P / HI
THANK YOU
Dr. Shashikant Goled.
Matruchaya P.U. college, Sedam
Dist: Gulbarga
e-mail:[email protected]
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