Physics
Which of the following group of elements are diamagnetic?

Argon, copper, silver
Oxygen, copper, silver
Hydrogen, argon, copper
Hydrogen, oxygen, Argon

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Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

Increasing the height of water in the vessel
Decreasing the radius of the capillary tube
None of these
Increasing the radius of the capillary tube

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Physics
The sky appears blue because

The atmosphere scatters blue colour more than the others
It is actually blue
All colours interfere to produce blue
In white light, the blue component dominates

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