TY  - BOOK
AU  - NCERT
TI  - Chemistry part I: : textbook for class xii
SN  - 81-7450-648-9
U1  - 540 N213C 
PY  - 2007///
CY  - New Delhi
PB  - : NCERT
KW  - Chemistry-textbook-Class 12th
KW  - Chemistry-Class 12th
UR  - https://ncert.nic.in/textbook.php?lech1=ps-5
ER  -