NCERT Class 12 Chemistry Examinations Questions and Answers
123 If cone, of reactant ‘A’ is increased 10 times and rate of reaction becomes 100 times. What is order with respect to ‘A’?
Answer: 1
125 Ag+(aq) + e– → Ag(s) E° = + 0.80 V
Fe2+(aq)+ + 2e– → Fe(s) E° = – 0.44 V
What is emf of
Fe(s) + 2Ag+(aq) → Fe2+(aq) + 2Ag(s)
Answer: 1.24 V
126 A new galvanic cell of E^u more than E°dl of Daniel cell is connected to Daniel cell in a manner that new cell gives electrons to cathode, what will happen
Answer: Ecell will decrease
129 If E°Fe2+/Fe = -0.441 V and E°Fe2+/Fe2+ = 0.771 V, the standard EMF of the reaction,
Fe + 2Fe3+ → 3Fe2+ will be
Answer: 1.212 V
130 The reaction, 3ClO– (aq) → ClO3 (aq) + 2Cl– (aq) is an example of
Answer: Disproportionation reaction