Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 29

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IMPORTANT

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A compound exists in the gaseous phase, both as a monomer $(A)$ and a dimer $(A_{2})$ . The atomic mass of $A$ is $48$ , and the molecular mass of $A_{2}$ is $96$ . In an experiment, $96 g$ of the compound was confined in a vessel of volume $33.6$ litres, and heated to $273 ° C$ . The pressure developed, if the compound exists as dimer to the extent of $50 %$ by weight under these conditions, will be

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Important Questions on States of Matter: Gases and Liquids

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NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 30

Oxygen and cyclopropane at partial pressures of

570 torr

and

170 torr

, respectively, are mixed in a gas cylinder. What is the ratio of the number of moles of cyclopropane to the number of moles of oxygen?

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 31

The partial pressure of hydrogen in a flask, containing two grams of hydrogen and

32 g

of sulphur dioxide, is

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 32

See the figure- $1$ :

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The valves of $X$ and $Y$ are opened simultaneously. The white fumes of ${NH}_{4} Cl$ will first form at:

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 33

The

R . M . S .

speed of the molecules of a gas of density

4 kg m^{- 3}

and pressure

1.2 \times 10^{5} N m^{- 2}

is:

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 34

The mass of the molecule

A

is twice that of the molecule

B

. The root-mean-square velocity of the molecule

A

is twice that of the molecule

B

. If two containers of equal volumes have the same number of molecules, the ratio of the pressures

P_{A} / P_{B}

will be

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 35

The average kinetic energy(in joules of) molecules in

8.0 g

of methane at

27 ° C

is :

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 36

The temperature of an ideal gas is increased from

120 K

to

480 K

. If at

120 K

, the root-mean-square velocity of the gas molecules is

v

, at

480 K

, it becomes:

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Chemistry Crash Course NEET>Chapter 3 - States of Matter: Gases and Liquids>Level 2>Q 37

The ratio between the

r . m . s .

velocity of

H_{2}

at

50 K

and that of

O_{2}

at

800 K

is: