Title DPP-9 SOLUTION.pdf ✅

CLASS : XIth SUBJECT : CHEMISTRY DATE : DPP No. : 9 1 (a) cp = Cp/M 2 (c) KE = 3 2 nRT = 3 2 × 2 × 8.314 × 300 = 7482.6 J 3 (b) Silica (SiO2) has gaint covalent structure 4 (d) When radius ratio between 0.732 –1.000, then coordination number is 8 and the structural arrangement is body centred cubic 5 (a) 200 = 2RT 2 × 10―3 or RT = 40 Average kinetic energy = 3 2 nRT = 3 2 × 8 2 × 40 = 240 J 7 (c) Graham’s law is valid at low pressure. 8 (a) Average speed of gas molecules = 8RT πM Most probable speed of gas molecules Topic :- STATES OF MATTER Solutions