As you say that you have completed your B. SC in Physics Chemistry and Mathematics. After B. SC in Physics Chemistry and Mathematics you have wide-ranging job opportunities. B.Sc. students are working, in ultramodern research laboratories or in the functional sciences.

Here I am providing you list of some of best Job opportunities after B.Sc. these are as follows:

Laboratories
Medical Research
Manufacturing and Processing Firms
Testing Laboratories
Technical Journals
Utility Companies
Waste-water Plant
Engineering firms
Medical Laboratories
Oil Industry
Petroleum Companies
Pharmaceutical Companies
Power Generating Companies
Pyrotechnics Manufacturers
Research and Development Firms
Seed and Nursery Companies Schools
Agricultural Research Services
Biotechnology Firms
Chemical Industry
Chemicals Manufacturing Companies
Cosmetic Companies
Colleges / Universities
Education Sector
Forensic Crime Research
Food Institutes
Health Care Providers
Heavy Chemical Industries
Hospitals
Industrial Laboratories
Indian Civil Services

Some of the private sector organizations recruiting graduates in B.Sc. are as follows:

Accelrys Inc
Advanta India Ltd.
Albany Molecular Research Centre Pvt Ltd. Hyderabad
Alltech Biotechnology Pvt. Ltd.
Amersham Pharmacia Biotech Asia Pacific Ltd., Chennai
Animal Biotech (Bangalore) Pvt. Ltd
Anshul Biotechnologies Aurobindo Pharma Ltd
Aristo Pharmaceuticals Ltd., Mumbai
AstraZeneca R&D
Avestha Gengraine Technologies Pvt. Ltd
Bhat Biotech
Aurigene Discovery Technologies Ltd.
Biocon
Biomax Life Sciences BioGenex
BrainWave Bioinformatics Ltd., Chennai
Care Biomedicals
Catalyst Pharma Consulting, Mumbai
Centre for Cellular and Molecular Biology
EPR Pharmaceuticals Ltd EPR
Excel Industries Limited, Mumbai
GVK Biosciences Pvt Ltd
Helvetica Industries Pvt. Ltd
Hi Tech Bio Laboratories, Pune
Indian Institute of Chemical Technology
Indigene Pharmaceuticals Ltd
InfoPro Solutions
Labland Biotechs
Laurus Laboratories Ltd
LAXAI AVANTI Life Sciences
Mithros Chemicals
Nektar Therapeutics India
Pioneer Overseas Corporation
Prescientis
Ranbaxy
ReaMetrix India Pvt. Ltd
Regain Biotechnology
Sai Life Sciences
Sami Lab
Sartorius
Sisco Research Laboratories Pvt. Ltd., Mumbai
Strand Genomics
Syngene International
Triesta LifeSciences
United States Pharmacopoeia (USP)
Vivimed Labs Ltd
Wockhardt
Xcyton