The decreasing order of ease of alkaline hydrolysis for the following esters in

The total number of isomers for a square planar complex
[M(F)(Cl)(SCN)(NO₂)] is

The major product formed in the reaction given below will be :

In a class of 140 students numbered 1 to 140, all even numbered students opted Mathematics course, those whose number is divisible by 3 opted Physics course and those whose number is divisible by 5 opted Chemistry course. Then the number of students who did not opt for any of the three courses is