Im not getting perfect answer.

here we will take b=4v or 8v and why

4v

but you once said if nothing is mentioned take 8v

read this

never i did not say this ever

about 8v i did not tell ever

then what about this?

here excluded volume is asked na

please mark this answer 🙏

what's your doubt??

sir but you once said if nothing will be given we will have to take b=8v

sourav excluded volume we calculate by using pair of molecules

so per molecules we take 1/2 of this

sir.. but it is not mentioned per pair of molecule

but we find excluded volume by taking per pair of molecules

so 8v is for per pair of molecules...and for per molecules it is 4v

what about this?

here it is only excluded volume which we take by considering per pair of molecules...so 8v

In kl Kapoor it is clearly mentioned this

see

sir can you make my confusion clear.. when to use what

here it is asking for one mole of N2 gas...so you have to find per molecule here and then multiply it by avogadro number

sir im asking about 4v 8v excluded volume vanderwall constant b

yes i m also telling that thing na

ques ke according hi na

sir excluded volume aur b mai koi difference hai?

per mole jb excluded volume puche to b hoga

per molecule ya per mole?

per mole

only excluded volume puche to 8v?

yes...ques accordingly hi pucha jayega

sir if they ask what is the value of co-volume of gas? ans kya hoga? 8v?

sourav iska derivation hi start hota hai by considering two sphere and excluded volume per pair

yes sir.. ans 8v hoga na?

yes