Which of the following graph represents the variation of capillary rise of liquid with radius of the capillary tube?
1. | 2. | ||
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the surface tension of water is 0.06 , then the capillary rise in a tube of diameter 1 mm is: \((\theta = 0^{\circ})\)
1. 1.22 cm
2. 2.44 cm
3. 3.12 cm
4. 3.86 cm
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe wettability of a surface by a liquid depends primarily on:
1. | viscosity |
2. | surface tension |
3. | density |
4. | angle of contact between the surface and the liquid |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWater rises to height h in a capillary tube. If the length of the capillary tube above the surface of water is made less than h, then:
1. | water does not rise at all. |
2. | water rises up to the top of the capillary tube, then starts overflowing like a fountain. |
3. | water rises up to the top of the capillary tube and stays there without overflowing. |
4. | water rises up to a point a little below the top and stays there. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA liquid filled in a container has a plane meniscus. If is the angle of contact, then:
1. | \(\theta=0^\circ\) | 2. | \(\theta=90^\circ\) |
3. | \(\theta<0^\circ\) | 4. | \(\theta=180^\circ\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf a capillary tube is partially dipped vertically into liquid and the levels of the liquid inside and outside are same, then the angle of contact is:
1. | 90° | 2. | 30° |
3. | 45° | 4. | 0° |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWater rises to a height \(\mathrm{h}\) in a capillary at the surface of earth. On the surface of the moon, the height of water column in the same capillary will be:
1. \(\mathrm{6h}\)
2.
3. \(\mathrm{h}\)
4. \(\mathrm{zero}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssertion (A): | When height of a tube is less than liquid rise in the capillary tube, the liquid does not overflow. |
Reason (R): | Product of radius of meniscus and height of liquid in capillary tube always remains constant. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the capillary experiment is performed in a vacuum, then for a liquid the capillary will:
1. | rise | 2. | remain the same |
3. | fall | 4. | rise to the top |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThree liquids of densities (with ), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact obey:
1. | \(\frac{\pi}{2}>\theta_1>\theta_2>\theta_3 \geq 0\) |
2. | \(0 \leq \theta_1<\theta_2<\theta_3<\frac{\pi}{2}\) |
3. | \(\frac{\pi}{2}<\theta_1<\theta_2<\theta_3<\pi\) |
4. | \(\pi>\theta_1>\theta_2>\theta_3>\frac{\pi}{2}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology