Q.1.
State the reducing agent in this reaction.Cu + 4HNO -> Cu(NO3)2 + 2H+ 2NO2
Q.2.
Check all the equations whereby the underlined substances has been oxidized.
Q.3.
Name the oxidising agent in the following reaction:nitrogen + hydrogen -> ammonia
Q.4.
The ionic equation shows the reaction between zinc (Zn) and hydrochloric acid.Zn + 2H+ -> Zn+ H2What change takes place in the zinc?
Q.5.
When a gas changes iron (III) oxide to iron (II) oxide, it shows that the gas is
Q.6.
In the reaction, Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
Q.7.
(a) Zn2+(aq) + 2e- -> Zn(s) -0.76(b) Cr3+(aq) + 3e- -> Cr(s) -0.(c) Fe2+(aq) + 2e- -> Fe(s) -0.41correct decreasing order of reducing agents is
Q.8.
Name the following ionic compound: Cs2S
Q.9.
A compound having +2 oxidation state of O is
Q.10.
Which problem is balanced?
Q.11.
H2O2--> H+O2 is an example of
Q.12.
In a voltaic cell electrons flow
Q.13.
Which energy conversion shown below takes place in a voltaic cell?
Q.14.
An increase in oxidation number.
Q.15.
What is oxidation number of H in CaH2?
Q.16.
What is oxidation number of Cr in Cr2O72-?
Q.17.
The basis of redox reactions is the
Q.18.
Bordo mix that is used in agriculture cannot be held in an iron container because iron reacts with the copper (II) sulphate. In the reaction, iron
Q.19.
The correct description about redox reaction is
Q.20.
Which one below is redox reaction?