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Everyday Science MCQs
Everyday Science MCQs
5120 MCQs (Page 306 of 512)
Attempt Everyday Science MCQs Quiz
Voltaic cell can be recharged by______________?
A. By addition of fresh solution
B. By replacing external circuit with external source of electricity
C. By removal of solution
D. By heating it
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H2 gas in SHE is filled at pressure of___________________?
A. 760mm of hg
B. 750mm of hg
C. 780mm of hg
D. 800mm of hg
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Chemical used in salt bridge is________________?
A. Koh
B. Kci
C. Kno3
D. Kbr
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List of elements based on hydrogen scale is called________________?
A. Periodic table
B. Groups
C. Periods
D. Electrochemical series
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In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be________________?
A. Greater
B. Lesser
C. Sum of reduction and oxidation potentials
D. None
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The relative lowering of vapour pressure is directly proportional to molality if the solution is________________?
A. Concentrated
B. Dilute
C. Saturated solution
D. All of the above
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If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?
A. H2 is deposited at cathode
B. Colour of the solution becomes fade
C. Cu is deposited at anode
D. All are possible
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Which has maximum oxidation number ?
A. N
B. Cr
C. S
D. Mn
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In an electrolytic cell current flows ?
A. From cathode to anode in outer circuit
B. From anode to cathode outside the cell
C. From cathode to anode inside the cell
D. Both b & c
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In a galvanic cell________________?
A. Chemical energy is converted into electricity
B. Chemical energy is converted into heat
C. Electrical energy is converted into chemical energy
D. Electrical energy is converted into heat
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