361130
Assertion : It is easier to spray water in which some soap is dissolved. Reason : Surface tension of soap solution is greater than surface tension of water.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
When a liquid is sprayed, the surface area of the liquid increases. Therefore, work has to be done in spraying the liquid, which is directly proportional to the surface tension. Because on adding soap, surface tension of water decreases, the spraying of water becomes easy. So option (3) is correct.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361131
Which of the following statements are true w.r.to contact angle
1 It's value lies between \(0^{\circ}\) and \(180^{\circ}\)
2 It's value changes with the pair of solid and liquid
3 It does not depend upon the inclination of the solid in the liquid
4 All the above
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361132
The wettability of a surface by a liquid depends primarily on
1 Angle of contact between the surface and the liquid
2 Viscosity
3 Surface tension
4 Density
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361133
For which of the two pairs, the angle of contact is acute
1 Water and glass, glass and mercury
2 Pure water and glass, glass and alcohol
3 Silver and water; mercury and glass
4 Silver and chromium; water and chromium
Explanation:
Both liquids water and alcohol have same nature (i.e., wet the solid). Hence angle of contact for both is acute.
361130
Assertion : It is easier to spray water in which some soap is dissolved. Reason : Surface tension of soap solution is greater than surface tension of water.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
When a liquid is sprayed, the surface area of the liquid increases. Therefore, work has to be done in spraying the liquid, which is directly proportional to the surface tension. Because on adding soap, surface tension of water decreases, the spraying of water becomes easy. So option (3) is correct.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361131
Which of the following statements are true w.r.to contact angle
1 It's value lies between \(0^{\circ}\) and \(180^{\circ}\)
2 It's value changes with the pair of solid and liquid
3 It does not depend upon the inclination of the solid in the liquid
4 All the above
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361132
The wettability of a surface by a liquid depends primarily on
1 Angle of contact between the surface and the liquid
2 Viscosity
3 Surface tension
4 Density
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361133
For which of the two pairs, the angle of contact is acute
1 Water and glass, glass and mercury
2 Pure water and glass, glass and alcohol
3 Silver and water; mercury and glass
4 Silver and chromium; water and chromium
Explanation:
Both liquids water and alcohol have same nature (i.e., wet the solid). Hence angle of contact for both is acute.
361130
Assertion : It is easier to spray water in which some soap is dissolved. Reason : Surface tension of soap solution is greater than surface tension of water.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
When a liquid is sprayed, the surface area of the liquid increases. Therefore, work has to be done in spraying the liquid, which is directly proportional to the surface tension. Because on adding soap, surface tension of water decreases, the spraying of water becomes easy. So option (3) is correct.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361131
Which of the following statements are true w.r.to contact angle
1 It's value lies between \(0^{\circ}\) and \(180^{\circ}\)
2 It's value changes with the pair of solid and liquid
3 It does not depend upon the inclination of the solid in the liquid
4 All the above
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361132
The wettability of a surface by a liquid depends primarily on
1 Angle of contact between the surface and the liquid
2 Viscosity
3 Surface tension
4 Density
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361133
For which of the two pairs, the angle of contact is acute
1 Water and glass, glass and mercury
2 Pure water and glass, glass and alcohol
3 Silver and water; mercury and glass
4 Silver and chromium; water and chromium
Explanation:
Both liquids water and alcohol have same nature (i.e., wet the solid). Hence angle of contact for both is acute.
NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361130
Assertion : It is easier to spray water in which some soap is dissolved. Reason : Surface tension of soap solution is greater than surface tension of water.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
When a liquid is sprayed, the surface area of the liquid increases. Therefore, work has to be done in spraying the liquid, which is directly proportional to the surface tension. Because on adding soap, surface tension of water decreases, the spraying of water becomes easy. So option (3) is correct.
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361131
Which of the following statements are true w.r.to contact angle
1 It's value lies between \(0^{\circ}\) and \(180^{\circ}\)
2 It's value changes with the pair of solid and liquid
3 It does not depend upon the inclination of the solid in the liquid
4 All the above
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361132
The wettability of a surface by a liquid depends primarily on
1 Angle of contact between the surface and the liquid
2 Viscosity
3 Surface tension
4 Density
Explanation:
Conceptual Question
PHXI10:MECHANICAL PROPERTIES OF FLUIDS
361133
For which of the two pairs, the angle of contact is acute
1 Water and glass, glass and mercury
2 Pure water and glass, glass and alcohol
3 Silver and water; mercury and glass
4 Silver and chromium; water and chromium
Explanation:
Both liquids water and alcohol have same nature (i.e., wet the solid). Hence angle of contact for both is acute.
