BITSAT SERIES Chemistry
Surface Tension
11 previous year questions.
Volume: 11 Ques
Yield: Medium
High-Yield Trend
2
2021 1
2020 1
2019 2
2017 1
2016 1
2015 1
2014 2
2010 Chapter Questions 11 MCQs
01
PYQ 2010
medium
chemistry ID: bitsat-2
Two mercury drops (each of radius r) merge to form a bigger drop. The surface energy of the bigger drop, if the surface tension is T, is
1
25Ο rΒ² T
2
4Ο rΒ² T
3
2Ο rΒ² T
4
28Ο rΒ² T
02
PYQ 2010
medium
chemistry ID: bitsat-2
Two circular plates of radius 5 cm each have a 0.01 mm thick water film between them. What will be the force required to separate these plates? (Surface tension of water = 73 dyne/cm)
1
125 N
2
95 N
3
115 N
4
105 N
03
PYQ 2014
medium
chemistry ID: bitsat-2
The work done in blowing a soap bubble of surface tension from radius to is:
1
2
3
4
04
PYQ 2015
medium
chemistry ID: bitsat-2
A glass capillary tube of internal radius is immersed in water. The top end of the tube is projected by above the surface of the water. At what angle does the liquid meet the tube? (Surface tension of water ).
1
2
3
4
05
PYQ 2016
medium
chemistry ID: bitsat-2
A capillary tube of radius r is immersed vertically in a liquid such that liquid rises in it to height h (less than the length of the tube). Mass of liquid in the capillary tube is m. If radius of the capillary tube is increased by 50%, then mass of liquid that will rise in the tube is:
1
2
3
4
(9)/(4)m
06
PYQ 2017
medium
chemistry ID: bitsat-2
A mercury drop of radius 1 cm is sprayed into drops of equal size. The energy expressed in joules is (surface tension of mercury is ).
1
2
3
4
5.7 Γ 10β»6
07
PYQ 2017
medium
chemistry ID: bitsat-2
A capillary tube of radius R is immersed in water and water rises in it to a height H. Mass of water in the capillary tube is M. If the radius of the tube is doubled, mass of water that will rise in the capillary tube will now be
1
2
3
4
4M
08
PYQ 2019
medium
chemistry ID: bitsat-2
A glass capillary tube of internal radius r = 0.25mm is immersed in water. The top end of the tube is projected by 2cm above the surface of the water. At what angle does the liquid meet the tube? Surface tension of water = 0.7N/m.
1
2
3
4
ΞΈ = 35^β
09
PYQ 2020
medium
chemistry ID: bitsat-2
A capillary tube of radius r is immersed vertically in a liquid such that liquid rises in it to height h (less than the length of the tube). Mass of liquid in the capillary tube is m. If radius of the capillary tube is increased by 50%, the mass of liquid that will rise in the tube is:
1
2
3
4
(9)/(4)m
10
PYQ 2021
medium
chemistry ID: bitsat-2
A capillary tube of radius R is immersed in water and water rises in it to a height H. Mass of water in the capillary tube is M. If the radius of the tube is doubled, mass of water that will rise in the capillary tube will now be
1
M
2
2M
3
M/2
4
4M
11
PYQ 2021
medium
chemistry ID: bitsat-2
A mercury drop of radius 1 cm is sprayed into 10βΆ drops of equal size. The energy expressed in joules is (surface tension of mercury is 460 Γ 10β»3N/m):
1
0.057
2
5.7
3
5.7 Γ 10β»4
4
5.7 Γ 10β»6