Hi

Yes, you need to follow the sequence or the order of the chapters under calculus as given in the NCERT because they are sequenced in proper way and if you don't follow that sequence you won't be able to move to the next chapter as one  chapter is linked to the other.

For example , without doing the chapter integrals you cannot move to application of  integrals

So you need to follow the given below sequence for calculus:-

• Continuity and differentiability
• Application of Derivative
• Integrals
• Application of integrals
• Differential equation

Calculus carries the highest weightage in your board examination so Go well through Calculus and the calculus is not that easy, so you'll have to give it time and practice a lot

I hope that you find this helpful

Thankyou