Number of molecules per unit volume of an ideal gas is ___________ (a) PRT (b) PN/RT (c) PT/RN (d) RN/KT

Hmmm nice question this question requires the knowledge of ideal gas equation which is Pv= nrt. So your answer will be n/v= p/rt hence again check your answer.

Yes , by applying PV=nRt (ideal gas equation) , we are getting" n/v =p/RT" , but the answer is pN/RT , which is correct ! Look don`t confuse between "n and N" both are totally different from each other , here "N" represent pressure num

No. Of molecules per unit volume means volume=1 and no. Of molecules =no. Of moles × N(Avogadro`s number) .....So, by applying ideal gas equation PV=nRT ,....v=1 .. Therefore, n/1=P/RT ...For molecules multiplying both sides by N...So we get nN/1=PN/RT.. Option (b)