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NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS
1
Hard
1 of 1
Understanding
+4 | -1
Given below are two statements: One is labelled as
Assertion (A) and the other· is labelled as Reason
(R).
Assertion (A) : Clothes containing oil or grease
stains cannot be cleaned by water wash.
Reason (R) : Because the angle of contact
between the oil/ grease and water is obtuse.
In the light of the above statements, choose the
correct answer from the option given below.
Assertion (A) and the other· is labelled as Reason
(R).
Assertion (A) : Clothes containing oil or grease
stains cannot be cleaned by water wash.
Reason (R) : Because the angle of contact
between the oil/ grease and water is obtuse.
In the light of the above statements, choose the
correct answer from the option given below.
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct
explanation of (A)
explanation of (A)
Option A (Both (A) and (R) are true and (R) is the correct explanation of (A)) is correct because oil and grease are non-polar substances, and water is a polar substance. The obtuse angle of contact indicates poor wetting, preventing water from effectively cleaning the stains.
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With the increase in temperature viscosity of a liquid -
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: When you squeeze one end of a tube to get toothpaste out from the other end, Pascal's principle is observed.
Reason R: A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container.
In the light of the above statements, choose the most appropriate answer from the options given below. Hydraulic lifts and hydraulic brakes are based
on As the temperature of a liquid is raised, the coefficient of viscosity A horizontal pipe of cross-sectional diameter 5 cm carries water at velocity of . The pipe is connected to a smaller pipe with a cross-sectional diameter 4 cm. the velocity of water through the smaller pipe is If two soap bubble of different radii are connected by a tube
Assertion A: When you squeeze one end of a tube to get toothpaste out from the other end, Pascal's principle is observed.
Reason R: A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container.
In the light of the above statements, choose the most appropriate answer from the options given below. Hydraulic lifts and hydraulic brakes are based
on As the temperature of a liquid is raised, the coefficient of viscosity A horizontal pipe of cross-sectional diameter 5 cm carries water at velocity of . The pipe is connected to a smaller pipe with a cross-sectional diameter 4 cm. the velocity of water through the smaller pipe is If two soap bubble of different radii are connected by a tube