GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
What happen when electric current is passed through acidified water by using carbon electrodes ?
Formation of hydrogen gas and oxygen gas.
Formation of Hydrogen peroxide.
Formation of hydrogen gas.
No change.
2
Which of the following device converts electrical energy into heat energy?
Microwave oven
Decoration lights
Electric train
Electric bell
3
_________________ refers to electrical conductivity.
α
γ
4
_____________ is a weak electrolyte.
KOH
HCl
HF
NH4Cl
5
________________ a well- known British experimental physicist, began his experiments on the passage of electricity through liquids (electrolyte) in 1834.
Michael Faraday
Richard Feynman
Issac Newton
Max Planck
6
When salts like sodium chloride (common salt), potassium iodide, etc, are heated, the molten salts so obtained are _____________ conductors
Good
Bad
Poor
None of these
7
___________ is a strong electrolyte.
Acetic acid
Carbonic acid
8
Non-metals like __________________ and _________________ are good conductors of electricity :
Wood and paper
Graphite and gas carbon
Glass and rubber
9
Which of the following is a good conductor of electricity ________________________.
hydrogen
oxygen
silver
plastic
10
Our body is a ______ conductor of electricity.
Natural
Neutral
11
Which of the following are correct :
(a) Unit of conductivity is Siemens per meter()
(b) Unit of conductivity is mho.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) are correct.
None of these.
12
(a) Electricity is used in hair dryer which produce heat.
(b) Electricity is used in bulbs and tube light which produce light.
13
In which of the following devices electricity is used to produce heat energy ?
Heater
Gyser
Kettle
All of the above
14
Which one of the following is not an insulator?
Mica
Glass
Wood
Graphite
15
(a) Michael Faraday, a well- known British experimental physicist, began his experiments on the passage of electricity through liquids (electrolyte) in 1834.
(b) Issac Newton, a well- known British experimental physicist, began his experiments on the passage of electricity through liquids (electrolyte) in 1834.
(c) When electric current is passed through acidified water by using carbon electrodes, than a chemical reaction takes place to form hydrogen gas and oxygen gas.
Only (a) and (b) are correct.
Only (a) and (c) are correct.
Only (b) and (c) are correct.
All of these.