WBCS PAPER-IV SCIENCE | WBCS MAIN PREVIOUS YEAR PAPER SOLVE - 2019 |

WBCS MAIN PREVIOUS YEAR SOLVE 2019 PAPER , PART- II
VERY HELPFUL AND ESSENTIAL FOR WBCS EXAM PREPARATION .
EACH TOPIC DISCUSSED IN DETAILS .

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LINK FOR WBCS PRELIMINARY SOLVED PAPER

   • WBCS 2019 PRELIMINARY SCIENCE QUESTIO...  

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Part 2 - Commonly used Chemical substances (in Bengali) Important for all competitive exams
Composition of Cement , LSD , Vermilian ,Cinnabar , Plaster of Paris ,Blue vitriol ,Aqua regia , Caffeine ,
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