Chemistry

CLASS XII CHEMISTRY UNIT 1 – SOLID STATE–NCERT

CLASS XII CHEMISTRY  UNIT 1 – SOLID STATE–NCERT 1.Silver forms ccp lattice and X-ray studies of its crystals show that the edge length of its unit cell is 408.6 pm. Calculate the density of silver (Atomic mass = 107.9 u). 2.Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions of nickel exist  as

• wp-admin-dvbc
• August 6, 2020

Chemistry

CLASS XII CHEMISTRY UNIT 2: ELECTRO-CHEMISTRY NCERT – 1

CLASS XII CHEMISTRY UNIT 2:  ELECTRO-CHEMISTRY    NCERT – 1 1.In the button cells widely used in watches and other devices the following reaction takes place: Zn(s) + Ag2O(s) + H2O(l ) ® Zn2+(aq) + 2Ag(s) + 2OH–(aq) Determine ΔrG 0 and E0  for the reaction. 2.A solution of CuSO4 is electrolysed for 10 minutes

• wp-admin-dvbc
• May 6, 2020