Questions

The macronutrient water is the most essential nutrient which plays a vital role in every function of the body. Macronutrients are those nutrients that are required in excess amounts for the development and functioning of the body.

Receptors for hearing the organ of corti or the spiral organ is located in the the mammalian cochlea.

Adi Sankara

Monopotassium tartarate was used in baking powder.

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

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. 

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

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