Mole Concept Test

Result

Mole Concept Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

100 ml mixture of CO and CO₂ is mixed with 30 ml of oxygen and sparked in a eudiometer tube. The residual gas after treatment with aqueous KOH has a volume of 10 m which remains unchanged when treated with alkaline pyrogallol. If all the volumes are under the same conditions, choose the correct option(s).

A
The volume of O₂ that remains unreacted, is 10 ml.

B
The volume of CO₂ that gets absorbed by aqueous KOH, is 90 ml.

C
The volume of CO that reacts, is 60 ml.

D
The volume of CO that remains unreacted, is 10 ml.

Solution

2CO+O₂→2CO₂ The residual gas is CO.
Volume of CO oxidized = 2 × 30 = 60 ml;
Volume of CO = 60 + 10 = 70 ml
Volume of CO₂initially present in the mixture = 100 −70
= 30 ml
Volume of CO₂ formed = 60 ml ;
Volume of CO₂ absorbed by KOH = 30 +60 = 90 ml