States of Matter Test

Result

States of Matter Test - 15

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Question 1
4 / -1

A weather balloon filled with hydrogen at 1 atm and 27ºC has volume equal to12000 litres. On ascending it reaches a place where temperature is – 23ºCand pressure is 0.5 atm. The volume of the balloon is

A
24000 litres

B
20000 litres

C
10000 litres

D
12000 litres

Solution
Question 2
4 / -1

3.2 g of oxygen (At. wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed ina 1. 12 litre flask at 0^oC. The total pressure of the gas mixture will be

A
1 atm

B
4 atm

C
3 atm

D
2 atm

Solution
Question 3
4 / -1

Pressure of a mixture of 4g of O₂ and 2 g of H₂ confined in a bulb of 1 litre at 0ºC is

A
25.215 atm

B
31.205 atm

C
45.215 atm

D
15.210 atm

Solution
Question 4
4 / -1

The density of methane at 2.0 atmosphere pressure and 27ºC is:

A
0.13 g L^-1

B
0.26 g L^-1

C
1.30 g L^-1

D
26.0 g L^-1

Solution
Question 5
4 / -1

The volume of 2.8 g of carbon monoxide at 27ºC and 0.821 atm pressure is (R = 0.0821 lit atm K^-1 mol^-1)

A
0.3 litre

B
1.5 litre

C
3 litre

D
30 litre

Solution
Question 6
4 / -1

Equal volumes of two gases which do not react together are enclosed in separate vessels. Their pressures at 100 mm and 400 mm respectively. If the two vessels are joined together, then what will be the pressure of the resulting mixture (temperature remaining constant)?

A
125 mm

B
500 mm

C
1000 mm

D
250 mm
Question 7
4 / -1

Equal weights of ethane and hydrogen are mixed in an empty container at 25^oC. The fraction of the total pressure exerted by hydrogen is

A
1 : 2

B
1 : 1

C
1 : 16

D
15 : 16

Solution
Question 8
4 / -1

A sample of O₂ gas is collected over water at 23ºC at a barometric pressure of 751 mm Hg (vapour pressure of water at 23ºC is 21 mm Hg). The partial pressure of O₂ gas in the sample collected is

A
21 mm Hg

B
751 mm Hg

C
0.96 atm

D
1.02 atm

Solution
Question 9
4 / -1

If some moles of O₂ diffuse in 18 sec and same moles of other gas diffuse in 45 sec then what is the molecular weight of the unknown gas?

A

B

C

D

Solution
Question 10
4 / -1

The rate of diffusion of methane at a given temperature is twice that of gas X.The molecular weight of X is

A
64.0

B
32.0

C
4.0

D
8.0

Solution