For such questions, we should know different formulas of limit.

The Lewis symbols of three unknown elements are as follows :
i) 
ii) 
iii) 
Write the formula of the different compounds formed by their combination.

How many and -bonds are there in the molecule of tetracyanoethylene ? 

If are non -zero, non -parallel vectors then the value of equals

The vectors and satisfy the equation (where are scalar constants and is a known vector). It is given that , then is equal to

A: For a reaction at equilibrium, the Gibb’s free energy of reaction is minimum at constant temperature and pressure.