Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 12

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Potassium hydroxide solutions are used to absorb ${CO}_{2}$ . How many litres of ${CO}_{2}$ at $1.00 atm$ and $22 ° C$ would be absorbed by an aqueous solution containing $15.0 g$ of $KOH ?$ (Take $R = \frac{1}{12} ℓ atm / K / mole)$

$2 KOH + {CO}_{2} ⟶ K_{2} {CO}_{3} + H_{2} O$

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Important Questions on States of Matter: Gases and Liquids

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 13

The volume of a gas increases by a factor of

2

while the pressure decreases by a factor of

3

. Given that the number of moles is unaffected, the factor by which the temperature changes is

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 14

If

V_{0}

is the volume of a given mass of gas at

273 K

at constant pressure, then according to Charle's law, the volume at

10 ° C

will be :

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 15

When a gas is compressed at constant temperature _____

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 16

A cylinder is filled with a gaseous mixture containing equal masses. of

CO

and

N_{2}

. The partial pressure ratio is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 17

A helium atom is two times heavier than a hydrogen molecule at

298 K

, the average kinetic energy of helium is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 18

Two flasks

A

and

B

have equal volumes.

A

is maintained at

300 K

and

B

at

600 K,

while

A

contains

H_{2}

gas,

B

has an equal mass of

{CO}_{2}

gas. Find the ratio of total

K . E .

of gases in flask

A

to that of

B

.

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 19

A quantity of gas is collected in a graduated tube over the mercury. The volume of gas at

18 ° C

is

50.0 mL

and the level of mercury in the tube is

100

torr above the outside mercury level. The barometer reads

750

Torr. Hence, volume at STP is approximately.

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Alpha Question Bank for Engineering: Chemistry>Chapter 3 - States of Matter: Gases and Liquids>Exercise-4>Q 20

If equal weights of oxygen and nitrogen are placed in separate containers of equal volume at the same temperature, which one of the following statements is true?

(mol wt: $N_{2} = 28, O_{2} = 32$ )