Apoorva Student Expert 19th Oct, 2019

Hello dear student,

In chemistry every question is important just like every chapter is important. And in higher senior secondary both 11th and 12th class comes so please be more precise about which class you are talking about. Anyways also tell us in what respect you are asking this ? For neet , IIT jee , or for school. Then it will be very easier for us to answer you.

Best wishes