Given below are the half-cell reactions:

Mn²⁺ + 2e^- $$\to$$ Mn; E^o = -1.18 V

2(Mn³⁺ + e^- $$\to$$ Mn²⁺); E^o = +1.51 V

The E^o for 3Mn²⁺ $$\to$$ Mn + 2Mn³⁺ will be :

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is:

The major organic compound formed by the reaction of 1, 1, 1– trichloroethane with silver powder is:

Sodium phenoxide when heated with $$C{O_2}$$ under pressure at $${125^ \circ }C$$ yields a product which on acetylation products $$C.$$



The major product $$C$$ would be