Trending @Wipro; Can we adjust the notice period with pending leave?

It depends on your present manager and your deliverables. If you are not holding lots of things for KT and your manager knows it, it can be negotiated otherwise no

I am on notice period, tried the same, have 10 AL, but the HR denied it saying there is no policy in Wipro to reduce the notice period...

Depends on manager, HR and dependency of deliverables/KT on u. People serve 1-2 weeks of notice period if in free pool.