Chemistry NCERT Exemplar Solutions Class 12th Chapter Eight

Among the gases (a) - (e), the gases that cause greenhouse effect are :

a) ${\mathrm{C}\mathrm{O}}_2$

b) ${\mathrm{H}}_2\mathrm{O}$

c) $\mathrm{C}\mathrm{F}\mathrm{C}\mathrm{s}$

d) ${\mathrm{O}}_2$

Among the following structure, which will show the most stable enamine formation?

Given below are two statements:

Statement I: According to the Ellingham diagram, any metal oxide with higher  is more stable that the one with lower .

Statement II: The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.

In the light of the above statements, choose the most appropriate answer form the options given below

The electronic configuration of Pt (atomic number 78) is:

Kindly consider the following equation

The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF₄, MnF₃ and MnF₂ is_________B.M [nearest integer]

The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are

On reaction with stronger oxidizing agent like KlO₄,hydrogen peroxide oxidizes with the evolution of O₂. The oxidation number of I in KlO₄, changes to__________.

At $20.0\mathrm{m}\mathrm{L}$ solution containing $0.2\mathrm{g}$ impure ${\mathrm{H}}_2{\mathrm{O}}_2$ reacts completely with $0.316\mathrm{g}$ of ${\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4$ in acid solution. The purity of ${\mathrm{H}}_2{\mathrm{O}}_2$ (in %) is (mol. wt. of ${\mathrm{H}}_2{\mathrm{O}}_2=34$ ; mol. wt. of ${\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4=158$ ) 

Which of the following pair is not isoelectronic species?

(At. No, Sm, 62; Er, 68; Yb, 70; Lu, 71; Eu, 63; Tb, 65; Tm, 69)