Physics
A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?

C1pa = C2pg
C2>C1
C1 = C2
C1>C2

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Physics
Absolute Zero is defined as

The temperature at which all molecular motion ceases
At which liquid Helium boils
At which water boils at 298K
At which the volume becomes zero

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Physics
An egg sinks in soft water but floats in a concentrated solution of salt because

Albumin dissolves in salt solution and egg becomes lighter
Egg absorbs salt from the solution and expands
The density of salt solution exceeds the density of eggs
Water has high surface tension

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