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Solvation and Disollution

Contraction i...

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Contraction in volume on combustion of 1 mL of C3H8 will be _____ml. How to solve?

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Q. A mixture of

C_{3} H_{8}

O_{2}

having total volume 100 ml in an Eudiometry tube is sparked & it is observed that a contraction of 45 ml is observed what can be the composition of reacting mixture.

Q. 200 ml of gaseous mixture containing

C O

C O_{2}

N_{2}

on complete combustion in just sufficient amount of

O_{2}

showed a contraction of 40 ml . When the resulting gases were passed through

K O H

solution it reduces by 50 ml, then calculate the volume of

V_{C O} : V_{C O_{2}} : V_{N_{2}}

in the original mixture.

Q. 12 ml of a gaseous mixture of an alkane and an alkene (containing same number of carbon atoms) require exactly 285 ml of air (containing

20 %

O_{2}

N_{2}

) for complete combustion at room temperature. After combustion when the gaseous mixture is passed through a KOH solution, it shows a volume contraction of 36 ml. Find the true statement(s) in the following options:

Q. On mixing 15.0 ml of ethyl alcohol of density 0,792g

{m l}^{- 1}

with 15 ml of pure water at

4^{o} C

, the solution is found to have a density of 0.924g

{m l}^{- 1}

. The percentage contraction in volume is:

Q. A mixture of methane and ethylene in the volume ratio

a : b

has a total volume of

30

mL. On complete combustion, it gave

40

C O_{2}

. If the ratio had been

b : a

a : b

, the volume (in

m L

C O_{2}

obtained would be :

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