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Chemistry Interview
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Q.1
What is the oxidation half reaction of Cu+2 + Zn → Cu + Zn+2?
a) Zn → Zn+2
b) Cu+2 → Cu
c) Cu+2 → Zn+2
d) Zn → Cu
Q.2
When a zinc rod is kept in a copper nitrate solution what happens?
a) zinc is deposited on copper
b) copper is deposited on zinc
c) zinc is deposited in the beaker
d) copper is deposited in the beaker
Q.3
In this reaction Cu+2 + Zn → Cu + Zn+what is an oxidising agent?
a) copper
b) zinc
c) hydrogen
d) oxygen
Q.4
Loss of electrons is _________________
a) oxidising agent
b) oxidation
c) reducing agent
d) reduction
Q.5
Intensity of blue colour increases gradually when _________________
a) copper rod is dipped in silver nitrate solution
b) silver rod is dipped in copper nitrate solution
c) zinc rod is dipped in silver solution
d) copper rod is dipped in zinc rod solution
Q.6
Which of the following is true as per metal activity series?
a) Zn<Ag<Cu
b) Zn<Cu<Ag
c) Zn>Ag>Cu
d) Zn>Cu>Ag
Q.7
What is a reducing agent of the reaction Cu+2 + Zn → Cu + Zn+2?
a) copper
b) zinc
c) hydrogen
d) oxygen
Q.8
The oxidation number of oxidant increases in a Redox reaction.
a) true
b) false
Q.9
Which of the following is not an oxidising agent?
a) magnesium oxide
b) carbon dioxide
c) ozone
d) sodium hydride
Q.10
Hydrogen peroxide is a ______________
a) oxidising agent
b) reducing agent
c) both reducing and oxidizing agent
d) neither reducing nor an oxidizing agent
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