I am interested is both physics and chemistry..but wanna do honors in one of them.. which will be a better option to choose

Both are different courses with different career prospects.

Chemistry:
There are many jobs available for graduates after B.Sc Chemistry in different government sector companies. You can also look for jobs in Railway sector and Bank sector. Teaching is another popular profession which can be opted by B.Sc Chemistry graduates.

Most of the industries nowadays use the chemicals in everything directly or indirectly like in food products, pharmaceuticals, electronic products or in construction. This creates opportunities for graduates, since they have the in-depth knowledge about various chemicals, compositions and their properties. The government laboratories, universities or colleges and the industries, mainly chemical and pharmaceutical, are the three major sectors which recruit the chemistry graduates. For the entry level jobs in these fields, graduates need at least a bachelors degree in chemistry. But for the senior positions like in research, they need PhD in the same.

Physics:
B. Sc Physics is an undergraduate course in the field of science. The course study educates the participants with various aspects of matter, motion, energy, time, and so on. The course offers adequate scope with regard to higher education as well as career. There exist ample master level courses for candidates who are interested in higher education. Apart from this, the candidate can seek career opportunities in Research organizations, and other related areas. Higher education after B. Sc Physics increases the proximity to get in to a high
The bachelor degree course in Physics acts as the base to study various higher education courses. Upon completion of the course, the candidate can go for masters degree in various specialized areas.

Hope this helps.
Good luck.