NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Anushka .
Subject: Chemistry
, asked on 23/9/17
solve it's urgent
56. Quantities of 16 g of oxygen and 14 g of nitrogen are contained in a closed bottle. The pressure inside the bottle is 4 atm. Now, 8 g O
2
gas is removed from the bottle. What will be the new pressure inside the bottle ?
(a) 2 atm (b) 4 atm
(c) 6 atm (d) 3 atm
Answer
2
Anushka .
Subject: Chemistry
, asked on 23/9/17
solve it's urgent.
Answer
2
Anushka .
Subject: Chemistry
, asked on 23/9/17
solve it's urgent.
Q.37. A bulb with chlorine gas at ambient pressure contains 3.55 g at t
°
C. When the bulb is placed in a second thermostat at a temperature 30
°
C higher and the stopcock of the bulb temporarily opened (and closed again) to restore the initial pressure, the bulb is now found to contain 3.2 g of chlorine. What is the value of t
°
C?
(a) 2.81
°
C
(b) 8.21
°
C
(c) 8.12
°
C
(d) 1.28
°
C
Answer
2
Anushka .
Subject: Chemistry
, asked on 23/9/17
solve it's urgent.
Q.36. A 101 bulb contains an ideal gas of molar mass 81 at 27
°
C. Some gas is removed from the bulb until the pressure of gas decreased by 0.82 atm. The mass of gas removed is
(a) 27 g
(b) 81 g
(c) 40.5 g
(d) 54 g
Answer
1
Anushka .
Subject: Chemistry
, asked on 23/9/17
solve it's urgent
Q.31. The volume occupied by 1.8 g
H
2
O
a
t
4
°
C
and 760 mm pressure is
(a) 1.8 l
(b) 1.8 ml
(c) 2.27 l
(d) 2.98 ml
Answer
1
Anushka .
Subject: Chemistry
, asked on 23/9/17
solve. answer- 0.000315
Q.28. The approximate length of the side of a cube containing. 850 million gas molecules at 0
°
C and 1 atm would be
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve:
60. A vessel is filled with a mixture of oxygen and nitrogen. At what ratio of par-tial pressures will the mass of gases be identical?'
(a) P(O
2
)=0.785 P(N
2
)
(b) P(O
2
)= 8.75 P(N
2
)
(c) P(O
2
)= 11.4 P(N
2
)
(d) P(O
2
)= 0.875 P(N
2
)
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve 66.
66.
A sample of air contains only N
2
, O
2
and H
2
O. It is saturated with water vapour and pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N
2
:O
2
is 3:1. The partial pressure of N
2
in the sample is
(a) 540 torr
(b) 900 torr
(c) 1080 torr
(d) 450 torr
Answer
2
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve
Answer
2
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve
Q.77. A certain gas diffuses from two different vessels A and B. The vessel A has a circular orifice while vessel B has square orifice of length equal to the radius of the orifice of vessel A. The ratio of the rates of diffusion of the gas from vessel A to vessel B, assuming same temperature and pressure is
(a)
π
(b) 1/
π
(c) 1
(d) 2
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.80. For 10 min each, at 27
°
C
, from two identical holes nitrogen and an unknown gas are leaked into a common vessel of 31 capacity. The resulting pressure is 4.18 bar and the mixture contains 0.4 mole of nitrogen. The molar mass of the unknown gas is
(a) 112
g
m
o
l
-
1
(b) 242
g
m
o
l
-
1
(c) 224
g
m
o
l
-
1
(D) 422
g
m
o
l
-
1
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
Q.56. Quantities of 16 g of oxygen and 14 g of nitrogen are combined in a closed bottle. The pressure inside the bottle is 4 atm. Now, 8 g
O
2
gas is removed from the bottle. What will be the new pressure inside the bottle?
(a) 2 atm
(b) 4 atm
(c) 6 atm
(d) 3 atm
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve
Q.53. Assume that air is 21 %
O
2
and 79 %
N
2
by volume, If the barometric pressure is 740 mm, the partial pressure of
O
2
is closest to which one of the following
(a) 155 mm
(b) 310 mm
(c) 580 mm
(d) 740 mm
Answer
1
Anushka .
Subject: Chemistry
, asked on 20/9/17
solve
Q.52. The partial pressures of
N
2
,
O
2
a
n
d
C
O
2
in a vessel are 38 cm of Hg, 190 torr and 0.5 atm, respectively. The total pressure of the mixture at the same temperature is
(a) 0.96 atm
(b) 1.02 atm
(c) 1.64 atm
(d) 1.25 atm
Answer
1
Prev
2
3
4
5
6
Next
What are you looking for?
56. Quantities of 16 g of oxygen and 14 g of nitrogen are contained in a closed bottle. The pressure inside the bottle is 4 atm. Now, 8 g O2 gas is removed from the bottle. What will be the new pressure inside the bottle ?
(a) 2 atm (b) 4 atm
(c) 6 atm (d) 3 atm
Q.37. A bulb with chlorine gas at ambient pressure contains 3.55 g at tC. When the bulb is placed in a second thermostat at a temperature 30C higher and the stopcock of the bulb temporarily opened (and closed again) to restore the initial pressure, the bulb is now found to contain 3.2 g of chlorine. What is the value of tC?
(a) 2.81C
(b) 8.21C
(c) 8.12C
(d) 1.28C
Q.36. A 101 bulb contains an ideal gas of molar mass 81 at 27C. Some gas is removed from the bulb until the pressure of gas decreased by 0.82 atm. The mass of gas removed is
(a) 27 g
(b) 81 g
(c) 40.5 g
(d) 54 g
Q.31. The volume occupied by 1.8 g and 760 mm pressure is
(a) 1.8 l
(b) 1.8 ml
(c) 2.27 l
(d) 2.98 ml
Q.28. The approximate length of the side of a cube containing. 850 million gas molecules at 0C and 1 atm would be
60. A vessel is filled with a mixture of oxygen and nitrogen. At what ratio of par-tial pressures will the mass of gases be identical?'
(a) P(O2)=0.785 P(N2)
(b) P(O2)= 8.75 P(N2)
(c) P(O2)= 11.4 P(N2)
(d) P(O2)= 0.875 P(N2)
66. A sample of air contains only N2, O2 and H2O. It is saturated with water vapour and pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2:O2 is 3:1. The partial pressure of N2 in the sample is
(a) 540 torr
(b) 900 torr
(c) 1080 torr
(d) 450 torr
Q.77. A certain gas diffuses from two different vessels A and B. The vessel A has a circular orifice while vessel B has square orifice of length equal to the radius of the orifice of vessel A. The ratio of the rates of diffusion of the gas from vessel A to vessel B, assuming same temperature and pressure is
(a)
(b) 1/
(c) 1
(d) 2
(a) 112
(b) 242
(c) 224
(D) 422
(a) 2 atm
(b) 4 atm
(c) 6 atm
(d) 3 atm
Q.53. Assume that air is 21 % and 79 % by volume, If the barometric pressure is 740 mm, the partial pressure of is closest to which one of the following
(a) 155 mm
(b) 310 mm
(c) 580 mm
(d) 740 mm
Q.52. The partial pressures of in a vessel are 38 cm of Hg, 190 torr and 0.5 atm, respectively. The total pressure of the mixture at the same temperature is
(a) 0.96 atm
(b) 1.02 atm
(c) 1.64 atm
(d) 1.25 atm