Gay Lussac's ...

Gay Lussac's Law, Avagadro's Law

Trending Questions

Q. If the pressure of a gas contained in a closed vessel is increased by 0.4% when heated by

1^{\circ} C

, its initial temperature must be:

$250 K$
$250^{\circ} C$
$25^{\circ} C$
$25 K$

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Q. Potassium combines with two isotopes of chlorine (

C l - 35

and

C l - 37

) respectively to form two samples of

K C l

. Their formation follows:

Law of constant proportions
Law of multiple proportions
Gay-Lussac's law
None of these

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Q. For which of the following reactions is Gay-Lussac’s law not valid?

$P C l_{5} (g) \to P C l_{3} (g) + C l_{2} (g)$
$H_{2} (g) + C l_{2} (g) \to 2 H C l (g)$
$2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g)$
$2 K C l O_{3} (s) \to 2 K C l (s) + 3 O_{2} (g)$

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Q. Find the volume occupied by

30 g

of neon gas at STP.

$22.4 L$
$24.7 L$
$22.7 L$
$33.6 L$

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Q. What is the volume of

C O_{2}

gas obtained on the complete combustion of

30 mL

of propane gas?

$10 mL$
$30 mL$
$90 mL$
$40 mL$

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For a cyclic process the condition is:

$Δ U = 0$
$Δ H = 0$
$Δ U > 0$ and $Δ H > 0$
Both $Δ U = 0$ & $Δ H = 0$

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Q. In a reaction, the ratios of volumes of nitrogen, hydrogen consumed and ammonia produced is 1:3:2. These figures illustrate the law of:

constant proportions
combining volumes by Gay-Lussac
multiple proportions
conservation of mass

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Q. A mixture of

C_{2} H_{2}

and

C_{3} H_{8}

occupied a certain volume at a pressure of 80 mm Hg. The mixture was completely burnt to form

C O_{2}

and

H_{2} O (l)

. If the pressure of

C O_{2}

was found to be 230 mm Hg at the same temperature and volume, then the mole fraction of

C_{3} H_{8}

in the mixture is:

0.125
0.875
0.6
0.8

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Q. If the pressure of the gas contained in a closed vessel is increased by

20 %

when heated by

273^{\circ} C

then, its initial temperature must have been:

$1052^{\circ} C$
$1029 K$
$1365^{\circ} C$
$1365 K$

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10 {dm}^{3}

N_{2}

gas and

10 {dm}^{3}

of gas

X

at the same temperature contain the same number of molecules and have same mass. The gas

X

is:

$C O_{2}$
$C O$
$H_{2}$
$N$

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Q. The temperature of a certain mass of a gas is doubled. If the initial pressure of the gas is 1 atm, find the % increase in pressure.

50%
100%
150%
200%

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$200 c . c .$ of a gas measured at S.T.P. has a mass of $0.268 g$ . Molecular weight of the gas is:

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Q. Potassium combines with two isotopes of chlorine (

C l - 35

and

C l - 37

) respectively to form two samples of

K C l

. Their formation follows:

Law of constant proportions
Law of multiple proportions
Gay-Lussac's law
None of these

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Q. Four 1 litre flasks are separately filled with

S O_{2}, S O_{3}, A r,

and

C H_{4}

gases at the same temperature and pressure. The ratio of the total number of atoms of these gases present in the different flasks would be?

$1 : 1 : 1 : 1$
$3 : 4 : 1 : 5$
$4 : 3 : 1 : 5$
None

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The density of a gas at S.T.P. is $1.40 g r a m s$ per litre. The molecular weight of the gas is

28
30
31.4
35

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Q. Which of the following represents Avogadro’s hypothesis?

Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compounds.
Equal volumes of all gases under the same temperature and pressure conditions contain an equal number of atoms.
Equal volumes of all gases under the same conditions of temperature and pressure contain an equal number of molecules.
Gases react together in volumes which bear a simple ratio to one another.

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