At 298 K, the standard electrode potentials of Cu2+ / Cu, Zn2+ / Zn, Fe2+ / Fe and Ag+ / Ag are 0.34 V, $$-$$0.76 V, $$-$$0.44 V V and 0.80 V, respectively.
On the basis of standard electrode potential, predict which of the following reaction cannot occur?
Given below ae two statements
Statement I:
In the coagulation of a negative sol, the flocculating power of the three given ions is in the order Al3+ > Ba2+ > Na+
Statement II:
In the coagulation of a positive sol, the flocculating power of the three given salts is in the order NaCl > Na2SO4 > Na3PO4
In the light of the above statements, choose the most appropriate answer from the options given below
Match List - I with List - II
List - I | List - II | ||
---|---|---|---|
(a) | Li | (i) | absorbent for carbon dioxide |
(b) | Na | (ii) | electrochemical cells |
(c) | KOH | (iii) | coolant in fast breeder reactors |
(d) | Cs | (iv) | photoelectric cell |
Choose the correct answer from the options given below :
Given below are two statements
Statement I : Primary aliphatic amines react with HNO2 to give unstable diazonium salts.
Statement II : Primary aromatic amines react with HNO2 to form diazonium salts which are stable even above 300 K.
In the light of the above statements, choose the most appropriate answer from the options given below.