Physics
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:

mercury is a metal.
cohesion of water is greater than its adhesion with glass.
cohesion of mercury is greater than its adhesion with glass.
density of mercury is greater than that of water.

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Physics
In the process of magnetisation of a bar

Only the ends of the bar get magnetised
Only some parts of the outer layers of the bar get magnetised
Only the surface of the bar gets magnetised
The entire bulk of the bar gets magnetised

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