Class 9 Chemistry MCQ
The formula of rust is:
Fe2O3,nH2o
Fe2O3
Fe(OH)3-nH2O
Fe(OH)3
The cathode of Daniel cell is made up of
Zn
Cu
AI
C
Gain of electrons in a reaction is called ____________reaction.
Oxidation
Reduction
Both
Nil
Which one of the following is not an electrolyte?
sugar solution
sulphuric acid solution
Lime solution
Sodium chloride solution
NaOH is prepared by ____________ of NaCL (aqueous).
Electrolysis
Decomposition
A & B
Nil
Reduction means
Removal of H2
Removal of electrons
Gain of electrons
Gain of O2
____________ agents gains electrons in chemical reaction.
Reduction
Oxidation
Both
None of these
The cathode of Nelson’s cell is made up of
C
Zn
Cu
Fe
Cu + 2AgNO3 ——-> Cu(NO3) +2Ag. In this reaction reducing agent is:
Cu
AgNO3
Cu(NO3)2
Ag
Spontaneous chemical reactions take place in:
electrolytic cell
Galvanic cell
(‘radio-button-click-target’, “Nelson’ s cell”)
downs cell
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