1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# On mixing 15.0 ml of ethyl alcohol of density 0,792gmlâˆ’1 with 15 ml of pure water at 4oC, the solution is found to have a density of 0.924gmlâˆ’1. The percentage contraction in volume is:

A
8%
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B
2%
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
3%
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
4%
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is B 3%Mass of alcohol =15×0.792=11.88 g Mass of water =15×1=15 g Total mass =11.88+15=26.88 g Volume of solution =mass of componentsdensity of solution =26.880.924=29.0909 mL Expected volume =(15+15)=30 mL Difference =30–29.0909=0.909 mL % Concentration in volume = differenceexpected volume×100 =0.90930×100 =3.03%

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Percentage Composition and Molecular Formula
CHEMISTRY
Watch in App
Explore more
Join BYJU'S Learning Program