KOTA ACADEMY
436 Ramkunj, Sahyadri Society, Shaniwar Peth, Karad
MT - CET
Date : 19-12-2012
Time : 00:45:00Mins
Marks : 50
1.
2.
3.
4.
6.
c) La(NO3)3
d) C6H12O6(glucose)
8.
9.
10.
11.
d) MgSO4
A solution contains non volatile solute of
molecular mass M2 which of the following can be
used to calculate the molecular mass of solute in
terms of osmotic pressure ?
M
M 𝑅𝑇
a) M2 = 2 VRT
b) M2 = 2
π
π
π
M2
M2 𝜋
c) M2 =
d) M2 =
πRT
π
π 𝑅𝑇
The freezing point of equimolar aqueous solution
will be highest for
a) C6H5NH3 Cl (aniline hydrochloride)
b) Ca(NO3)2
7.
ETHER & SOLUTIONS
Partial pressure of a solution component is
directly proportional to its mole fraction. This
statement is known as.
a) Henry’s law
b) Raoult’s law
c) Distribution law
d) Ostwald’s dilution law.
In which mode of expression the concentration of
a solution remains independent of temperature?
a) Molarity
b) Normality
c) Formality
d) Molality
Molarity of a solution is the number of
a) gram – equivalents of a solute per 1000 ml of
the solution
b) moles of the solute per 100 g of the solvent
c) moles of the solute per 1000 g of the solvent
d) moles of the solute per 100 ml of the solvent
Which of the following compound corresponds
van Hoffa factor (i) to be equal to 2 for dilute
solution?
a) K2SO4
b) NaHSO4
c) Sugar
5.
TEST ID: 169
CHEMISTRY
12.
13.
14.
30 g of acetic acid is dissolved in 1 dm–3, of a
solvent. The molality of the solution will be (Given
15.
density of solvent = 1.25g. cm–3)
a) 0.4
b) 0.3
c) 0.5
d) 0.45
Assuming complete dissociations Van’t Hoff factor
of Ca(NO3)2 is
a) 1
b) 2
c) 3
d) 4
The phenomenon of osmosis was reported by
a) Berkeley
b) Graham
c) Abbey Noelle
d) Ostwald
The Raoult’s law of lowering of V.P. is best
applicable in determination of correct molecular
weight in case of
a) volatile solute in a concentrated solution
b) volatile solute in a dilute solution
c) non–volatile solute in a concentrated solution
d) non–volatile solute in a dilute solution
Osmosis is the flow; through semipermeable
membrane of
a) solvent molecules from pure solvent to solution
b) solvent molecules from a solution of lower
concentration to that at lower concentration
c) solvent molecules from a solution of higher
concentration to that at lower concentration
d) both (a) and (b) above
The vapour pressure of a solution (P) and the
vapour pressure of the solvent(P0) are related to
each other(X1 is the mole fraction of solvent)
a) P = P0x2
b) P = P0x1
c) P0 = Px1
d) P0 = Px2
The osmotic pressure of a solution of a solution at
276K is 2.5atm . Its osmotic pressure at 546K
under similar conditions will be
a) 0.5atm
b) 1.0atm
c) 2.5atm
d) 5.0atm
Which one is not a collective property?
a) Boiling point
b) Osmotic pressure
c) Elevation of boiling point
d) Lowering of vapour pressure
The freezing point of a solution prepared from
1.25 g of non electrolyte and 20 g of water is 271.9
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16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
K. If molar depression constant is 1.86 K mol-1
then molar mass of the solute will be
a) 105.7
b) 106.7
c) 115.3
d) 93.9
Elevation in boiling point was 0.520C 6 g of a
compound X was dissolved in 100 g of water.
Molecular weight of X is (Kb for water is 0.52 per
1000 g of water)
a) 120
b) 60
c) 180
d) 600
In a aqueous solution the molecular weight of
sodium chloride, as obtained from the colligative
properties, is
a) is normal molecular weight
b) more than its normal molecular weight
c) less than its normal molecular weight
d) unpredictable
The temperature at which the vapour pressure is
equal to the external pressure is called
a) critical temperature b) boiling point
c) normal point
d) melting point
Collective properties of solution are those which
depends upon
a) the nature of the solvent
b) the nature of the solute
c) the number of solvent molecular
d) the number of solute and solvent particle
The vapour pressure of a liquid depends on
a) its surface area
b) its volume
c) temperature
d) all these
The isotonic solution have same
a) molarities
b) osmotic pressure
c) temperature pressure d) all these
A molar solution is one that contains one mole of
a solution in
a) 1000g of the solvent
b) one liter of the solvent
c) one liter of the solution
d) 22.4 liter of the solution
The osmotic pressure will be lowest for
a) 0.10 M sucrose
b) 0.10 M sodium nitrate
c) 0.08 M barium nitrate
d) 0.06 M sodium sulphate
The Van’t Hoff factor calculated from association
data is always than calculated from dissociation
data
a) less
b) more
c) same
d) more or less
Rectified spirit contains 95% ethanol by mass,
mole – fraction of ethanol is
26.
27.
28.
29.
a) 0.188
b) 0.811
c) 0.999
d) 0.881
Structure of diethyl ether can be confirmed by
a) Kolbe’s synthess
b) Frankland’s synthesis
c) Wurtze synthesis
d) Williamson’s synthesis
Which of the following ether will give two
sucessive members of homologous series on acid
hydrolysis
a) diethyl ether
b) dimethyl ether
c) ethyl methyl ether
d) methyl n-propyl ether
Only dimethyl ether is soluble in water because
a) It is gaseous state
b) It is most reactive ether
c) It form intermolecular H-bonding
d) It form H-bonding with
Which of the following produce more convinent
for the preparation of pure ethers?
a) alcohol and conc. H2SO4
b) alkyl halide and sodium alkoxide
c) alcohol and alkyl halide
d) alcohol and diazomethane
30. The compound which is mixed with alcohol to get
a substitute for petrol is
a) ethanol
b) diethyl ether
c) acetaldehyde
d) propanol
31. In the hydrolysis of ethers H2SO4 act as
a) hydrolysis constant b) dehydrating agent
c) catalyst
d) oxidising agent
32. An organic compound (A) C2H6O react with
sodium metal to form compound (B) with
evolution of H2 gas and give yellow compound(C)
with alkaline iodine. When (A) is heated with
conc. H2SO4 at 413K gives a compound (D)
C4H10O which treatment with conc. HI at 373K
gives (E) The compound (D) also obtained when
(B) is heated with (E). Identify compound (E)
a) C2H5OH
b) C2H5I
c) C2H5 -O -CH3
d) C2H5 -O-C2H5
33. The compound which is not isomeric with diethyl
ether is
a) n-propyl methyl ether b) butan-1-ol
c) 2-methyl propan-2-ol d) butanone
34. Ether is used as a medium in the preparation of
Grignard’s reagent because it
a) catalyses the reaction
b) is volatile and can be easily removed
c) is inert in natural
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d) does not interfere in the preparation
35. Ethers
a) Forms intermolecular H-bonding
b) has no any dipole movement
c) has no any active group
d) are linear molecule
36. Ethers are anhydride of
a) carboxylic acid
b) alcohol
c) water
d) none of these
37. Name the following compound
(CH3)2 CH- O -CH2 -CH2-CH3 is
38.
39.
40.
41.
42.
43.
a) isopropyl propyl ether
b) dipropyl ether
c) di-isopropyl ether
d) isopropyl propyl ketone
Ether is represented as.
a) R-O-R’
b) RCHO
c) RCOOH
d) RCOOR’
Ethers are isomeric with
a) monohydric alcohol b) Dihydric alcohol
c) Trihydric alcohol
d) none of these
Find out the wrong statement about ethers
a) They are colourless volatile liquids
b) They are pleasant odour
c) They are lighter than water
d) Their density is lower than water
Methoxy methane is obtained from
a) methyl iodide and diazomethane
b) iodomethane and sodium ethoxide
c) diazomethane and ethanol
d) methanol and diazomethane
Due to high volatile nature of ethers they are used
as
a) insectiside
b) heating agent
c) anaesthetic
d) cooling agent
In williamson’s synthesis, tert-alkyl halides can
not be used because.
a) they readly decompose to give olefins along
with ethers
b) they are not reactive
c) the reaction become reversible
d) it is difficult to remove halogen atom
44. The IUPAC name of CH3-OCH(CH3)2
a) Methoxy propane
b) 3-methoxy propane
c) 2-methoxypropane d) methoxy methanol
45.
CH3
46.
47.
48.
49.
50.
CH3-CH2-CH2-O-CH3 and CH3 - CH- O-CH3
are
a) Chain isomers
b) Functional isomer
c) Position isomers
d) metamers
Ethers are
a) neutral
b) acidic
c) basic
d) amphoteric
Ethers are obtained from alcohol by
a) oxidation
b) hydration
c) intermolecular dehydration
d) intramolecular dehydration
When sodium methoxide reacts with
chloroethane, the following compound forms
a) ethoxy methane
b) methoxy ethane
c) ethoxy ethane
d) methoxy methane
Ethers form co-ordinate bond with Lewis acids
because of
a) Presence of H on oxygen
b) Presence of lone pair of electrons on oxygen
c) positive inductive effect of two alkyl group
d) one electron is shared each by oxygen and
Lewis acids
The bond angle in C - O - C in ether molecule is
a) 180O
b) 150O
c) 90O
d) 110O
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KOTA ACADEMY
436 Ramkunj, Sahyadri Society, Shaniwar Peth, Karad
MT - CET
Date : 19-12-2012
Time : 00:45:00Mins
Marks : 50
TEST ID: 169
CHEMISTRY
: ANSWER KEY :
1)
5)
9)
13)
17)
21)
25)
b
b
c
d
c
d
d
2)
6)
10)
14)
18)
22)
26)
d
d
d
a
b
a
d
3)
7)
11)
15)
19)
23)
27)
d
a
d
a
d
a
c
4)
8)
12)
16)
20)
24)
28)
d
c
b
b
c
a
c
29)
33)
37)
41)
45)
49)
d
d
d
d
c
b
30)
34)
38)
42)
46)
50)
a
d
a
d
a
d
31)
35)
39)
43)
47)
c
c
a
a
c
32)
36)
40)
44)
48)
c
b
b
c
b
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KOTA ACADEMY
436 Ramkunj, Sahyadri Society, Shaniwar Peth, Karad
MT - CET
Date : 19-12-2012
Time : 00:45:00Mins
Marks : 50
TEST ID: 169
CHEMISTRY
: HINTS AND SOLUTIONS :
2
(d)
The value of Vant’ Hoff factor (i) for sucrose,
Molality is the number of more of solute dissolved
sodium nitrate, barium nitrate,and sodium
per kilogram of solvent . Mass does not depend
sulphate are 1,2,3 and 3 respectively.
upon the temperature.
π=iMRT is minimum for glucose.
6
(d)
i,e. π=1× 0.10 RT
Depression in freezing point ∆T1=ikf m the value 25 (d)
of Van’ Hoff factor (i) is minimum (i, e, unity) for
100 g ethanol soln. contains 95 g of ethanol
the glucose, which is a non electrolyte. Hence,
the mass of water is (100-95)g=5 g
aqueous solution of glucose has highest freezing
∴ mole fraction of ethanol
nC2 H5 OH
point.
Xc2 H3 OH =
nC2 H3 OH + nH2 O
7
(a)
(95/46)
Wt. of solvent = v × d
=
(95/46) + (5/18)
= 1000 × 1.25 = 1250 g
30×1000
= 0.881
1000 g (or 1 kg) will contain
= 24 g
1250
27 (c)
wt .per kg of solvent
24
∴Now, molality=
=
=
0.4
dil. H2 SO4 .
Mol .wt .
60
CH3 -O-C2 H5 +
CH3 OH+C2 H5 OH
12 (b)
CH3 OH , C2 H5 OH:- Successive member of
Vapour pressure of solution(P) = vapour pressure
homologous series of alcohol
of the solvent × V.P. of pure solvent
29
(d)
= x1×P0 = P0x1
In diazomethane process by product obtained as
15 (a)
N2 gas ; purification is not necessary
𝐾𝑓 × 1000 × 𝑊
𝑀=
therefore ether is obtained.
𝑊 × ∆𝑇𝑓
33 (d)
1.86 × 1000 × 1.25
=
ether and ketone are not isomer of each other
20 × 1.1
41 (d)
≈ 105.7
16 (b)
HBf4
CH3OH + CH2 N2
CH3 -O-CH3 + N2
K b ×w×1000
44 (c)
m=
∆Tb ×W
2-methoxy propane
0.52×6×1000
47 (c)
=
0.52×100
The intermolecular hehydration,of alcohol
=60
because H2 molecule is remove from two different
17 (c)
molecule of same alcohol.
Due to dissociation, the molecule breaks into ions, 48 (b)
hence observed mol. Wt. is less than normal mol.
∆
CH
-O-Na
+
Cl-C
H
CH3 -O-C2 H5 + NaCl
3
2
5
Wt.
Na.
methoxide
chloroethane
methoxy
22 (a)
ethane.
Molality of the solution is the number of mole of
solute dissolved in 1,000g of solvent
23 (a)
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