5 $m l$ of a gaseous hydrocarbon( $C_{x} H_{y}$ ) was exploded with 30 $m l$ of oxygen. The resulting gas on cooling to room temperature is found to measure 25 $m l$ of which 10 $m l$ are absorbed by $N a O H$ and the remainder by pyrogallol. The value of x+y is?

___

Open in App

Solution

Balanced equation
$C_{x} H_{y} + (x + \frac{y}{4}) O_{2} ⟶ x C O_{2} + \frac{y}{2} H_{2} O_{(l)}$

5 $m L$ 30 $m L$

0 $30 - 5 (x + \frac{y}{4})$

5x

since 5x=10 $\Rightarrow$ x=2

$30 - 5 (x + \frac{y}{4}) = 15 \Rightarrow y = 4$

Therefore formula of hydrocarbon = $C_{x} H_{y}$

x + y = 2 + 4 = 6

Suggest Corrections

Similar questions

5ml of a gaseous hydrocarbon $(C_{x} H y)$ was exploded with 30 ml of oxygen. The resulting gas on cooling to room temperature is found to measure 25ml of which 10ml are absorbed by NaOH and the remainder by Pyrogallol. The value of x + y is?___

10

mL of a gaseous hydrocarbon is exploded with

100

mL of oxygen. The residual gas on cooling is found to measure

95

mL of which

20

mL is absorbed by caustic soda and the remainder by alkaline pyrogallol. The formula of the hydrocarbon is :

Q. 7.5 ml of a gaseous hydrocarbon was exploded with 36 ml of

O_{2}

. On cooling, the volume of gases was found to be 28.5 ml, 15 ml of which was absorbed by

K O H

and the rest was absorbed in a solution of alkaline pyrogallol. The formula of hydrocarbon is:

Q. 20 ml of methane was exploded with

80

ml of

O_{2}

and cooled to room temperature, the final volume of gaseous mixture is:

24 m l

of water gas containing only hydrogen and carbon monoxide in equal proportions by volume, are exploded with

80 m l

of air,

20

by volume of which is oxygen. If all gaseous volumes are measured at room temperature and pressure, calculate the composition by volume of the resulting gaseous mixture.

Join BYJU'S Learning Program

5 ml of a gaseous hydrocarbon(CxHy) was exploded with 30 ml of oxygen. The resulting gas on cooling to room temperature is found to measure 25 ml of which 10 ml are absorbed by NaOH and the remainder by pyrogallol. The value of x+y is? ___

Balanced equation CxHy+(x+y4)O2⟶xCO2+y2H2O(l) 5 mL 30 mL 0 30−5(x+y4) 5x since 5x=10 ⇒ x=2 30−5(x+y4)=15⇒y=4 Therefore formula of hydrocarbon = CxHy x + y = 2 + 4 = 6

5 $m l$ of a gaseous hydrocarbon( $C_{x} H_{y}$ ) was exploded with 30 $m l$ of oxygen. The resulting gas on cooling to room temperature is found to measure 25 $m l$ of which 10 $m l$ are absorbed by $N a O H$ and the remainder by pyrogallol. The value of x+y is?

___