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The end of a glass tube becomes round on...

The end of a glass tube becomes round on heating due to

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When glass is heated, it melts. The surface of this liquid tends to have a minimum area. For a given volume, the surface area is minimum for a sphere. This is why the ends of a glass tube become rounded on heating.
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CBSE COMPLEMENTARY MATERIAL-PROPERTIES OF MATTER-MULTIPLE CHOICE QUESTIONS (MCQs)
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  2. A spring is stretched by applying a load to its free end. The strain...

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  3. The maximum load a wire can withstand without breaking, when its lengt...

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  4. A rigid bar of mass M is supported symmetrically by three wires each o...

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  5. A mild steel wire of Length 2L and cross sectional Area A is stretched...

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  6. For an ideal liquid : (More than one option may be correct)

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  7. The stress strain graph for this materials are shown figure. (assume s...

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  8. A tall cylinder is filled with viscous oil. A round pebble is dropped ...

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  9. An ideal fluid flows through a pipe of circular cross-section made of ...

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  10. The angle of contact at the interface of water glass is 0^(@) ethylalc...

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  11. A bimetallic strip is made of aluminum & steel (alpha(AI) gtalpha("ste...

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  12. A Uniform Metallic Rod rotates about its perpendicular bisector with c...

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  13. As the temperating is increases, the time period of pendulum

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  14. Refer to the plot of temperating versus time showing the changes in th...

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  15. A student records the initial length l, change in temperature DeltaT a...

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  16. The approximate depth of an ocean is 2700 m. The compressibility of wa...

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  17. The Young's Modulus of steel is twice that of brass. Two wires of same...

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  18. Two rods of different materials having coefficients of thermal expansi...

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  19. In the given figure, if the dimension of the two wires are the same an...

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  20. The two ends of a metal rod are maintained at temperatures 100^(@)C an...

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  21. Steam at 100^(@)C is passed into 20 g of water at 10^(@)C, then water ...

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