Question

8. If the density of liquid A (Carbon tetrachloride) is 1.6 g cm-3 and its height h = 25 cm,
then the density of oil B of height h = 50 cm in the U-tube is about
A) 1.25 g cm-3
C) 0.80 g cm -3
B) 3.20 g cm-3
D) 0.31 g cm-3

​

Answer 1

Answer:

A 'U' tube contains oil, carbon tetrachloride and water as shown in the figure. The density of oil is 0.8 g cm  

−3

 and that of carbon tetrachloride is 1.6 g cm  

−3

. If oil and water surfaces are at the same level, find the height of the water column

518746

MEDIUM

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ANSWER

Now the pressure along the horizontal line will remain same.

So P  

1

​  

=P  

2

​  

 

ρ  

oil

​  

15+ρ  

ccl  

4

​  

 

​  

(C−15)=ρ  

water

​  

C

0.8×15+1.6×(C−15)=C

C=20cm

solution

Explanation: