Redox Reaction ...

Direction (Q. Nos. 1-12) This section contains 12 multiple-choice questions. Each question has four
choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Consider the following reactions.
I. Zn + dil. H₂So₄ → ZnSO₄ + H₂
II. Zn + conc. H2SO4 → ZnSO₄ + SO₄ + H₂O
III. Zn + HNO₃ → Zn(NO₃)₂ + H₂O + NH₄NO₃

Q.  Oxidation number of H changes in: 

In which case change of oxidation number of V is maximum? 

In which of the following set of compounds oxidation number of oxygen is not (- 2)?

Which is chlorate (I) ion?

Which of the following is not an example of redox reaction?

Which of the following atom has been assigned only single oxidation number?

The oxidation number of P in Ba(H₂PO₂)₂, Ba(H₂PO₃)₂ and Ba(H₂PO₄)₂ are respectively

the oxidation number of sulphur in S₈,S₂F₂,H₂S respectively are

In which of the following reactions oxidation number of chromium has been affected?

Prussian blue is represented by KFe^x[Fe(CN)₆]. Value of x is

In the following reaction, , oxidation number of

Select the set of compounds having fractional oxidation number in one or more atoms.