No it's not necessary but everyday looking and then learned by heart will help you out of many questions in chemistry
And it's not too hard to learn it
First learn it by method you have been taught
For eg for 1st group "hlenakbrasefarar" hlena kbara se farar
Then when you have learned of all group like then leave it other side
And learn the periodic table in sequence like H He Li Be B C N O F Ne
Matlab jaha tak ho pae

Lagbhag 47Ag 48Cd tak yaad karlo bahut jyada kaam dega



Yaad karne ke baad jab khali time mile to usko dohrate rahne ekdam jabardast yaad ho jaega

No, it is not compulsory to learn periodic table for JEE preparation.

 

It is recommended that you should learn first 30 elements of the periodic table to increase your speed.

 

Good Luck!!

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