### NEET Chemistry - New - States of Matter: Gases and Liquids

#### Question - 1

The beans are cooked earlier in pressure cooker, because:

• A B.P. increase with increasing pressure
• B B.P. decrase with increasing pressure
• C Extra pressure of pressure cooker, softens the beans
• D Internal energy is not lost while cooking is pressure cooker

#### Question - 2

Which one of the following statement is wrong for gases?

• A Gases do not have a definite shape and volume
• B Volume of the gas is equal to volume of container confining the gas
• C Confined gas exerts uniform pressure on the walls of its container in all directions
• D Mass of a gas cannot be determined by weighing a container in which it is enclosed.

#### Question - 3

Equal masses of H2, O2 and methane have been taken in a container of volume V at temperature 27$\circ$C in identical conditions. The rational of the volume of gases H2 : O2 : CH4 would be :

• A 8: 16: 1
• B 16: 8: 1
• C 16: 1: 2
• D 8: 1: 2

#### Question - 4

A gaseous mixture was prepared by taking equal moles of CO and N2. If the total pressure of the mixture was found 1 atm, the partial pressure of the nitrogen (N2) in the mixture is :

• A 0.8 atm
• B 0.9 atm
• C 1 atm
• D 0.5 atm

#### Question - 5

In Duma's method of estimation of nitrogen 0.35gm of an organic compound gave 55 ml of nitrogen collected at 300 K temperature and 715mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at 300K = 15mm)

• A 16.45
• B 17.45
• C 14.45
• D 15.45

#### Question - 6

Cyclopropane and oxygen at partial pressure 170 torr and 570 torr are mixed in a gas cylinder. What is the ratio of the number of moles of cyclopropane to the number of moles of oxygen?

• A $\frac { 170\times 42 }{ 570\times 32 } =0.39$
• B $\frac { 170 }{ 42 } /\left( \frac { 170 }{ 42 } +\frac { 570 }{ 32 } \right) \approx 0.19$
• C $\frac { 170 }{ 140 }$=0.23
• D $\frac { 170 }{ 570 }$=0.30

#### Question - 7

Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mol L-1? [R = 0.082 L atm mol-l deg -1]

• A at STP
• B When V = 22.4 L
• C When T = 12K
• D Impossible under any conditions.

#### Question - 8

The correct value of the gas constant 'R' is close to:

• A 0.082 L atm K
• B 0.082 L-atm K-l mol-l
• C 0.082 L atm-l K mol-l
• D 0.082 L-1 atm-l K mol

#### Question - 9

At constant temperature, in a given mass of ideal gas:

• A The ratio of pressure and volume always remains constant
• B Volume always remains constant
• C Pressure always remains constant
• D The product of pressure and volume always  remains constant

#### Question - 10

Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature by definite fraction of its volume at :

• A O°C
• B Absolute zero
• C Its critical temperature
• D Its Boyle's temperature