GATE Questions

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Lipids are soluble in solvents of low polarity, which simply means that lipids are soluble in nonpolar solvents. This solubility property is a result of the large nonpolar regions that are indicative of the lipid molecule.

The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Water vapor exists as an invisible gas in the air.

The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity.

The maximum amount of water vapor that can be in the air depends on the air temperature.

From the given list of numbers, by observing

Only 3 pairs of numbers have the difference of 12.

They are 

20 - 32

44 - 32

44 - 56.

DOZENS.

If we remove 'S' from it, it is DOZEN which tells that 12.

1/4 of 12

= 1/4 x 12

= 3

Hence, 1/4 of 12 = 3.

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

Resistivity :

Resistivity is a measure of the resistance to the flow of electrons. 

Conductivity :

Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.

Example:

Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance.