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Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.49. A quantity of 10 g of an ideal gas is expanded at constant temperature until its pressure becomes half of the initial pressure. The quantity of 1.25 g of the rarefied gas occupies 50 ml at the same final pressure and temperature. The initial volume of the gas was
(a) 200 ml
(b) 400 ml
(c) 800 ml
(d) 25 ml
Answer
3
Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.48. A certain mass of an ideal gas at 9 atm and 30
°
C is first heated to 131
°
C at constant volume and then the amount of the gas is increased by 50 % at constant volume and temperature. The final pressure of the gas becomes
(a) 9 atm
(b) 4.5 atm
(c) 18 atm
(d) 13.5 atm
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve...answer m/4
Q.45. A container contains certain gas of mass m at high pressure. Some of the gas has been allowed to escape from the container. After some time, the pressure of the gas becomes half and its absolute temperature two-third. The amount of the gas escaped is
Answer
3
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve
Q.43. A compound exists in the gaseous phase both as monomer (A) and dimer (B). The molecular mass of A is 48. In an experiment, 96 g of the compound was confined in a vessel of volume 33.61 and heated to 546 K. What is the pressure developed if the compound exists as dimer to the extent of 50% by weight under these conditions?
(a) 2 atm
(b) 4 atm
(c) 3 atm
(d) 0.5 atm
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.39. A 0.5
d
m
3
flask contains gas A and 1
d
m
3
flask contains gas B at the same temperature. If density of A is twice that of B and the molar mass of A is half of B, then the ratio of pressure exerted by gases is
(a)
P
A
/
P
B
= 2
(b)
P
A
/
P
B
= 1
(c)
P
A
/
P
B
= 4
(d)
P
A
/
P
B
= 3
Answer
2
Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.38. If the absolute temperature of an ideal gas having volume V
c
m
3
is doubled and the pressure is reduced to half, the final volume of gas will be
(a) 0.25 V
(b) 0.50 V
(c) 2
V
2
(d) 4 V
Answer
3
Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.35. A vessel contains 1 mole of
O
2
gas at a temperature T. The pressure of the gas is P. An identical vessel containing 1 mole of He gas at a temperature 2T has a pressure of
(a) P/8
(b) P
(c) 2P
(d) 8P
Answer
1
Anushka .
Subject: Chemistry
, asked on 14/9/17
A graph is plotted between pressure and volume at different temperatures. On the basis of the graph what changes will you observe in the volume if
(i) the pressure is increased at constant temperature.
(ii) the temperature is decreased at constant pressure.
Answer
1
Hamsini
Subject: Chemistry
, asked on 3/7/17
Rate of diffusion of pure oxygen was found to be 0.95 times the mixture of ionosed oxygen. Calculate the %of ozone in the mixture
Answer
1
Hamsini
Subject: Chemistry
, asked on 27/6/17
Solve this :
I
f
a
c
c
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d
i
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g
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o
B
o
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l
e
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:
P
1
P
2
=
V
2
V
1
&
a
c
c
o
r
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i
n
g
t
o
C
h
a
r
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e
'
s
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w
;
V
1
V
2
=
T
1
T
2
t
h
e
n
f
r
o
m
t
h
e
s
e
e
q
u
a
t
i
o
n
s
P
1
P
2
=
T
2
T
1
B
u
t
i
t
i
s
P
1
P
2
=
T
1
T
2
W
h
y
?
Answer
1
Janhavi Panambor
Subject: Chemistry
, asked on 12/11/16
Q5..plz answer fast
Answer
1
Janhavi Panambor
Subject: Chemistry
, asked on 12/11/16
Q5..plz answer fast
Answer
1
Yayah Ahmad
Subject: Chemistry
, asked on 24/10/16
write basic postublates of daltons atonmic theory
Answer
1
Yayah Ahmad
Subject: Chemistry
, asked on 24/10/16
define boyles law
Answer
4
Saba Siddiqui
Subject: Chemistry
, asked on 23/7/16
It was told to us by my Chem. Sir that if tge difference in tge electro negativities of 2 elements is less that 0.4 than they are pur covalent compounds. Later he said, if tge diff. Is less than 0.4 than they are Non-polar. So does it mean that a non-polar molecule is purelyy covalent??
Answer
2
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What are you looking for?
(a) 200 ml
(b) 400 ml
(c) 800 ml
(d) 25 ml
(a) 9 atm
(b) 4.5 atm
(c) 18 atm
(d) 13.5 atm
Q.45. A container contains certain gas of mass m at high pressure. Some of the gas has been allowed to escape from the container. After some time, the pressure of the gas becomes half and its absolute temperature two-third. The amount of the gas escaped is
Q.43. A compound exists in the gaseous phase both as monomer (A) and dimer (B). The molecular mass of A is 48. In an experiment, 96 g of the compound was confined in a vessel of volume 33.61 and heated to 546 K. What is the pressure developed if the compound exists as dimer to the extent of 50% by weight under these conditions?
(a) 2 atm
(b) 4 atm
(c) 3 atm
(d) 0.5 atm
(a) = 2
(b) = 1
(c) = 4
(d) = 3
(a) 0.25 V
(b) 0.50 V
(c) 2
(d) 4 V
(a) P/8
(b) P
(c) 2P
(d) 8P
(i) the pressure is increased at constant temperature.
(ii) the temperature is decreased at constant pressure.