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5
×
Sodium Carbonate Solution is a _________ [Strong / Weak / Non] Electrolyte.
Weak
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10
×
Mention any two differences between metallic and electrolytic conduction.
To be discussed
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15
×
Explain how OH- ion yields oxygen gas at the anode.
4 OH- ons lose an electron each and give 2 molecules of water and one molecule of oxygen
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10
×
State the charge of the electrode where oxidation takes place.
Positive
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10
×
What is electroplating?
Electroplating is the electrolytic process of deposition of a superior metal on the surface of a baser metal or article.
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5
×
Metals which ionize most readily are at the ________ of the series. [top / bottom]
top
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5
×
Which metals do not require electro-refning?
Metals that are extracted by electrolysis
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10
×
What is kept at anode and cathode in electro-refining of copper?
Cathode: Pure thin sheet of copper, Anode: Impure block of copper
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20
×
State the entire electro-chemical series of metals in proper order.
K, Ca, Na, Mg, Al, Zn, Fe, Pb, [H], Cu, Hg, Ag
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×
monster
Reset all scores!
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×
star
Double points!
Okay!
×
gift
Win 10 points!
Okay!
×
banana
Go to last place!
Oops!
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heart
Other team wins 15 points!
Oops!
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shark
Other team loses 15 points!
Okay!
×
shark
Other team loses 5 points!
Okay!
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lifesaver
Give 25 points!
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5
×
___________ takes place in covalent compounds. [dissociation / ionization]
Ionisation
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thief
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25
×
rocket
Go to first place!
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fairy
Take points!
5
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15
20
25
×
baam
Lose 20 points!
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10
×
Which is the negative electrode? Which ions migrate to it?
Cathode, Cation
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5
×
Name the electrode that diminishes during electroplating.
Anode
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10
×
Why are articles electroplated? [two reasons]
To prevent corrosion and to make them attractive
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