3. 4. Consider the species CH4, NH and BH. Choose the correct option with respect to the there species (a) They are isoelectronic and only two have tetrahedral structures. (b) They are isoelectronic and all have tetrahedral structures. (c) Only two are isoelectronic and all have tetrahedral structures. (d) Only two are isoelectronic and only two have tetrahedral structure 4.0 moles of argon and 5.0 moles of PCI, are introduced into an evacuated flask of 100 litre capacity at 610 K. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be 6.0 atm. The Kp for the reaction is [Given R = 0.082 L atm K- mol] (a) 2.25 (b) 6.24 (c) 12.13 (d) 15.24