9th Chemistry MCQs Sindh Board
On this youtube channel you will learn Ninth Class Chapter No.07 electrochemistry. Solved chapter with book exercise MCQs With Solved Answers. If you are looking 9th Class sukkur Sindh Board chemistry Chapter Wise Solved MCQs With Answers You are on this channel "Naz Online Academy ". You will learn online here Objective type IX Class chemistry Solved Unit 7 Most Repeated MCQs with Solved Answers.part 2.
::::: Questions solved :::::
Dry cell is also called:
A. Leclanche cell
B. secondary battery
C. Lead storage battery
D. None of them
In a dry cell, this is used as an electrolyte.
A. NH2CI paste
B. ZnCl2 paste
C. either a or b
D. Both a and b
Faraday's First Law of Electrolysis states that the amount of any substance that is
deposited or liberated at an electrode during electrolysis is directíy proportional to the:
A. Charge deposited on electrodes
B. mass of the substance or electrolyte
C. their chemical equivalent masses
D. quantity of electricity passed through the electrolyte
Dry cell uses ______________
A. Magnese dioxide as anode & zinc as cathode
B. zinc as anode & magnese dioxide as cathode
C. Lead as anode & Lead oxide as cathode
D. Lead oxide as anode & Lead as cathode
Lead storage battery is an example of:
A. Leclanche cell
B. Secondary battery
C. primary battery
D. None of the above
Lead storage battery uses _______
A. Magnese dioxide as anode & zinc as cathode
B. zinc as anode & magnese dioxide as cathode
C. Lead as anode & Lead oxide as cathode
D. Lead oxide as anode & Lead as cathode
In lead storage battery, this is used as electrolyte.
A. NH2CI paste
B. ZnCl2 paste
C. Solution of H2So4
D. None of the above
Number of alloys, used for different purposes, are:
A. 70
B. 700
C. 7000
D. 70000
Brass is an alloy of _______
A. Cu-Zn
B. Cu-Sn
C. Cu-Zn-Sn
D. Ag-Cu
Alloy of iron and carbon is called:
A. Brass
B. Bronze
C. Duralumin
D. Steel
It is called 100% pure gold.
A. 24 karat
B. 22 karat
C. 18 karat
D. 10 karat
To make stainless steel,-iron is mixed with:
A. Cu-Zn
B. Cu-Sn
C. Cr -Ni
D. Ag-Cu
The coating of metal at the surface of other metal by the electrolytic process is called:
A. Electrolysis
B. Electrolyte
C. Galvanizing
D. Electroplating
The process in which zinc is electrolytically coated at the surface of other base metal is called:
A. Electrolysis
B. Electrolyte
C. Galvanizing
D. Electroplating
In W=ZAt Z is called
A. constant
B. Product
C. Electrochemical equivalent
D. None of the above
In which type of cells, oxidation (loss of electrons) occurs at anode and reduction (gain of electrons) occurs at the cathode?
A. Electrochemical
B. Electrolytic
C. Primary
D. Secondary
The electrochemical reaction in which atom, molecule or ion loss electrons is called:
A. Reduction reaction
B. Oxidation reaction
C. Electrolytic reaction
D. Cathodic reaction
In reduction reaction, oxidation number :
A. Becomes zero
B. remains the same
C. Decreases
D. Incrcases
Equivalent mass = ______________
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