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Recent questions tagged chemical effect of electric current
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Tin cans, used for storing food, are made by electroplating tin onto iron. Why?
asked
Mar 17, 2019
by
kratos
chemical effect of electric current
chemical effects of electric current
class-8
+2
votes
1
answer
In LEDs, the longer lead (wire) is always connected to the termi.
asked
Feb 5, 2019
by
kratos
chemical effect of electric current
class-8
+3
votes
1
answer
Some liquids are good conductors of electricity and some are poor conductors. Which one is a poor conductor?
asked
Jan 7, 2019
by
kratos
chemical effect of electric current
class-8
+2
votes
1
answer
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of
asked
Dec 28, 2018
in
Class 10
by
kratos
chemical effect of electric current
class-8
class-7
icse
class-10
physical and chemical changes
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1
answer
The process of depositing a layer of any desired metal on another material by means of electricity is called .
asked
Dec 16, 2018
by
kratos
chemical effect of electric current
class-8
+2
votes
1
answer
Chromium plating is usually made by electrolysis in a solution of chromic acid. The chromium plated objects form the cathode.
asked
Oct 22, 2018
by
kratos
chemical effect of electric current
icho
class-8
+3
votes
1
answer
Define conductivity of a conductor. Explain the variation of conductivity with temperature in (a) good conductors,
asked
Oct 1, 2018
in
JEE
by
kratos
chemical effect of electric current
cbse
class-8
electromagnetic waves
jee
class-10
jee mains
metals and non-metals
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vote
1
answer
When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually ......... gas.
asked
Sep 25, 2018
by
kratos
chemical effect of electric current
class-8
+3
votes
1
answer
The electrolytic bath used in gold plating of copper articles, contains :
asked
Aug 24, 2018
in
Class 12
by
kratos
chemical effect of electric current
d-and f- block elements
neet
cbse
class-8
coordination compounds
class-12
+2
votes
1
answer
A coating of is deposited on iron to protect it from corrosion and formation of rust
asked
Aug 21, 2018
by
kratos
chemical effect of electric current
class-8
+1
vote
1
answer
Why are most carbon compounds poor conductors of electricity ?
asked
Aug 4, 2018
in
Class 10
by
kratos
chemical effect of electric current
cbse
class-8
class-10
carbon and its compounds
+2
votes
1
answer
Endorsing the bill means: (a) Giving the bill on charity (b) Depositing the bill with the government treasury
asked
Jul 31, 2018
in
Class 12
by
kratos
chemical effect of electric current
financial market
cbse
class-8
commercial bank
meaning and function
class-12
+3
votes
1
answer
Why is tin electroplated on iron to make cans used for storing food?
asked
Jul 4, 2018
by
kratos
chemical effects of electric current
class-8
chemical effect of electric current
+1
vote
1
answer
A solid X melts slightly above 273 K and is a poor conductor of heat and electricity. To which of the following categories does it belong?
asked
Jun 22, 2018
in
JEE
by
kratos
air
chemical effect of electric current
cbse
chemical effects of electric current
jee main 2020
class-8
synthetic fibres and plastics
+1
vote
1
answer
(i) Lead sulphate from lead carbonate (ii) Sodium sulphate using dilute sulphuric acid. (iii) Copper chloride using copper carbonate.
asked
Jun 8, 2018
in
Class 10
by
kratos
chemical effect of electric current
sulphuric acid
class-8
acids bases and salts
class-10
icse
study of compounds
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vote
1
answer
Why are most carbon compounds poor conductors of electricity ?
asked
May 31, 2018
in
Class 10
by
kratos
chemical effect of electric current
cbse
class-8
class-10
carbon and its compounds
+1
vote
1
answer
When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually ...... gas.
asked
May 7, 2018
by
kratos
chemical effect of electric current
class-8
+2
votes
1
answer
Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?
asked
Apr 30, 2018
by
kratos
chemical effect of electric current
class-8
+1
vote
1
answer
Zinc is used to protect iron from corrosion because zinc is A. more electropositive than iron B. cheaper than iron
asked
Apr 26, 2018
in
Class 12
by
kratos
chemical effect of electric current
metals and nonmetals
d-and f- block elements
neet
class-8
aiims
the d- and f- block elements
class-12
+2
votes
1
answer
Chromium plating is done on many objects such as car parts,bath taps, kitchen gas stove etc. Why?
asked
Feb 14, 2018
by
kratos
chemical effects of electric current
class-8
chemical effect of electric current
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