Class 9 Chemistry MCQ
The metallic plates through which electrons enters and leaves electrolytes:
Wires
Electrodes
Both
Nil
Which one of the following is not an electrolytic cell:
Down cell
Galvanic cell
(‘radio-button-click-target’, “Nelson’ cell”)
Both a and c
Which one is not a property of electrolytic cell?
It consists of one complete cell
Anode has +ve charge
It converts electrical energy into chemical one
Anode has -ve charge
The oxidation number of chromium in K2Cr2O7 is:
+2
+6
+7
+14
In silver plating Anode is made of:
Gold
Ag
Neon
Nil
Metals are covered by using.
(‘radio-button-click-target’, “Baeyer’s test”)(‘radio-button-click-target’, “Bohr’s”)
Electrolysis
None
CO2 the oxidation number of C =.
+1
+2
+3
+4
The formula of rust is:
Fe2O3,nH2o
Fe2O3
Fe(OH)3-nH2O
Fe(OH)3
All electrolytes are:
Conductor
Insulator
Semi conductor
Nil
____________ of copper is done by electrolysis.
Production
Refining
Both
Nil
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