a a a a a a a a a a a a a a a a sa a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a , a a a a a a a a a za a , a a a a a a a za a a a a a a a Ya a a a a a a a a a a 81 a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a , a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a Y a a a a a a a a a sa a a a a a a a a a a a a a a a a za a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a !Bharat mein pahli bar ek sachitr aur abhinav pustak prastut ki gai hai jisamen prarambhik siddhanton ke saath saral aur manoranjak tarike se bhautiki, rasayan vigyan, jeevvigyan aur electronic se sambandhit 81 prayogon ko samajhaya gaya hai. ek sankshipt upgrade block bhi hai, jo prayogon ko asani se sikhne mein madad karta hai. project pariksha mein achchhe ank prapt karne aur vigyan mele aur pradarshaniyon ke liye madhyamik aur varishth madhyamik ke chhatron ke liye yeha ek aparihary pustak hai!An illustrated and innovative book is presented for the first time in India, in which 81 experiments related to Physics, Chemistry, Biology and Electronics have been explained in a simple and engaging way with fundamental principles. Also there is a brief upgraded block which helps in learning the experiments easily. This is an indispensable book for students of secondary and senior secondary to get good marks in the project exam and for science fairs and exhibitions.