Q1: Which of these molecules has the largest bond angle? (a) NH3 (b) PF5 (c) CH4 (d) CO2 Q2: Which of the following bonds is expected to have the largest dipole moment? (a) C-Si (b) O-O (c) C-N (d) S-C MENTION THE REASON: (1 Mark) Q4: How many L of air are needed to completely burn 1 mole of methane in air ( 20% oxygen ) at STP according to the reaction CH4+2O2CO2+2H2O (a) 22.4L (b) 44.8L (c) 11.2L (d) 224L SHOW THE CALCULATION: (1 Mark) Question 6: Define the term hybridization. Draw the structure of the ClF3 and explain its bond angles, hybridization and structure on the basis of the VSEPR theory. (2 MARKS)