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question_answer1)
Which one of the following is a weak electrolyte?
A)
\[HCl\]solution done
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B)
Citric acid solution done
clear
C)
Na OH solution done
clear
D)
\[Cu\,S{{O}_{4}}\]solution done
clear
E)
None of these done
clear
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question_answer2)
A bulb placed in the electric circuit in the given experimental set-up does not glow because:
A)
The liquid used in the above experiment may be a strong electrolyte. done
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B)
The liquid used in the above experiment may not be conducting electricity. done
clear
C)
The bulb may be fused done
clear
D)
Both [b] and [c] done
clear
E)
None of these done
clear
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question_answer3)
LED refers to:
A)
Light emitting diode done
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B)
Light electrolyte diode done
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C)
Less electrolyte demand done
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D)
Light electrolyte demand done
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E)
None of these done
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question_answer4)
Which one of the following is correct pair?
A)
Cathode - Positive electrode done
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B)
Anode - Negative electrode done
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C)
Cation - Negative ion done
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D)
Anion - Positive ion done
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E)
None of these done
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question_answer5)
In electrolysis, salt solution breaks up into positively and negatively ? charged particles are called:
A)
Electrodes done
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B)
Electrons done
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C)
Ions done
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D)
Insulators done
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E)
None of these done
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question_answer6)
Two plane mirrors MN and NO are kept at right angle to each other as shown in the given figure. A ray of light CD is incident on the mirror MN and the angle of incidence is\[{{50}^{o}}\]. What will be the angle of reflection for the mirror NO.
A)
\[{{50}^{o}}\] done
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B)
\[{{60}^{o}}\] done
clear
C)
\[{{30}^{o}}\] done
clear
D)
\[{{40}^{o}}\] done
clear
E)
None of these done
clear
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question_answer7)
Galvanization involves the coating of which metal over steel or iron?
A)
Chromium done
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B)
Copper done
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C)
Zinc done
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D)
Brick done
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E)
None of these done
clear
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question_answer8)
Which of the following is correct for electroplating a metal X with copper through electrolyses?
A)
Metal X-Anode done
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B)
Copper-Cathode done
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C)
Copper sulphate solution ? Electrolyte done
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D)
All the above done
clear
E)
None of these done
clear
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question_answer9)
Choose the correct option for the given figure.
A)
(a - incident ray), (b - normal ray), (c - reflected ray), (d - angle of incidence) done
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B)
(a - reflected ray), (b - incident ray), (c - normal ray), (d -angle of reflection) done
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C)
(a - incident ray), (b - normal ray), (c - reflected ray), (d - angle of reflection) done
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D)
(a - angle of incidence), (b - normal ray), (c - reflected ray), (d - incident ray) done
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E)
None of these done
clear
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question_answer10)
The process of depositing a thin layer of desired metal over a metal object with the help of electric current is called?
A)
Combination done
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B)
Electroplating done
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C)
Electrolysis done
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D)
All the above done
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E)
None of these done
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question_answer11)
When a ray of light falls normally on a plane mirror, then the angle of incidence is:
A)
\[{{30}^{o}}\] done
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B)
\[{{0}^{o}}\] done
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C)
\[{{180}^{o}}\] done
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D)
\[{{60}^{o}}\] done
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E)
None of these done
clear
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question_answer12)
On which of the following surfaces diffused reflection will not take place
A)
Paper done
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B)
Plane mirror done
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C)
Cardboard done
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D)
Unpolished metal object done
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E)
None of these done
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question_answer13)
Look at the following figure and choose the correct option.
A)
X represents anode, Y represents cathode done
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B)
X represents cathode, Y represents anode done
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C)
Both represent anode done
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D)
Both represent cathode done
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E)
None of these done
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question_answer14)
Which one of the following is an effect produced by electric current?
A)
Heating effect done
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B)
Chemical effect done
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C)
Magnetic effect done
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D)
All the above done
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E)
None of these done
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question_answer15)
Electrode connected to negative terminal of the battery is a/an:
A)
Electrolyte done
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B)
Anode done
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C)
Cathode done
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D)
Cell done
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E)
None of these done
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question_answer16)
_____ is an apparatus used to produce a thin beam of light.
A)
Microscope done
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B)
Telescope done
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C)
Ray-box done
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D)
Pin-hole camera done
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E)
None of these done
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question_answer17)
Image formed by a plane mirror is:
A)
Real done
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B)
In front of the mirror done
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C)
Diminished done
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D)
Laterally inverted done
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E)
None of these done
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question_answer18)
Raman is standing at a distance of 2.5m from a plane mirror, how far he would be from his image?
A)
2.5m done
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B)
5m done
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C)
3m done
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D)
1m done
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E)
None of these done
clear
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question_answer19)
To purify copper metal by electrolysis which of the following is used as electrolyte
A)
\[NaCl\]solution done
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B)
\[CuS{{O}_{4}}\]solution done
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C)
\[{{H}_{2}}S{{O}_{4}}\]solution done
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D)
\[MgS{{O}_{4}}\]solution done
clear
E)
None of these done
clear
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question_answer20)
____ is used in a periscope for the reflection of light.
A)
Concave lens done
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B)
Convex lens done
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C)
Concave mirror done
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D)
Plane mirror done
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E)
None of these done
clear
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question_answer21)
What will be the number of images formed when two plane mirrors are kept inclined at an angle of\[{{60}^{o}}\].
A)
4 done
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B)
5 done
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C)
10 done
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D)
3 done
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E)
None of these done
clear
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question_answer22)
Hole present at the center of iris called:
A)
Retina done
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B)
Blind spot done
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C)
Pupil done
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D)
Eye lens done
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E)
None of these done
clear
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question_answer23)
Which of the following solutions will not make the bulb glow placed in an electric circuit?
A)
Sulphuric acid solution done
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B)
Sodium chloride solution done
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C)
Silver nitrate done
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D)
Sugar solution in diluted water done
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E)
None of these done
clear
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question_answer24)
Which one of the following observations can be observed when electric current is passed through an electrolyte in which two electrodes are present?
A)
Bubbles of gas may be formed on the electrodes. done
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B)
Deposits of metal may be seen on electrodes. done
clear
C)
Change in the colour of the solution may take place. done
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D)
All the above done
clear
E)
None of these done
clear
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question_answer25)
Radhika is standing at a distance of 10 cm from the plane mirror, how far should she move so that the distance between her and her image will become 10 cm.
A)
10 cm towards the mirror. done
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B)
5 cm away from the mirror. done
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C)
5 cm towards the mirror. done
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D)
10 cm away from the mirror. done
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E)
None of these done
clear
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question_answer26)
In electroplating the metal on which electroplating is to be done is made the:
A)
Anode done
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B)
Cathode done
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C)
Electrolyte done
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D)
Electric cell done
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E)
None of these done
clear
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question_answer27)
Hypermetropia can be corrected by using:
A)
Concave lens done
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B)
Convex lens done
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C)
Concave mirror done
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D)
Concavo - convex lens done
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E)
None of these done
clear
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question_answer28)
___ metal is mostly used for electroplating on car parts, bicycle-handlebars to give them a shiny appearance.
A)
Iron done
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B)
Copper done
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C)
Chromium done
clear
D)
Aluminum done
clear
E)
None of these done
clear
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question_answer29)
Which gas is produced at anode when current passes through acidified water?
A)
Hydrogen done
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B)
Oxygen done
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C)
Nitrogen done
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D)
Fluorine done
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E)
None of these done
clear
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question_answer30)
Human eye-lens is a:
A)
Concave lens done
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B)
Convex lens done
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C)
Concavo - Convex lens done
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D)
Convexo - Concave lens done
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E)
None of these done
clear
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question_answer31)
Which one of the following is an application of chemical effect of current?
A)
Electroplating done
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B)
Purification of metals done
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C)
Decomposing chemical compounds done
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D)
All the above done
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E)
None of these done
clear
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question_answer32)
____ effect of electric current is indicated by change in colour of a solution by passing electric current through it.
A)
Physical done
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B)
Chemical done
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C)
Heating done
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D)
Magnetic done
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E)
None of these done
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question_answer33)
Rajan wants to deposit a layer of silver metal on a steel spoon then match the following according to the above statement.
Column A | Column B |
(i) | Silver | [A] | Cathode |
(ii) | Steel | [B] | Electroplating |
(iii) | Silver cyanide solutions | [C] | Anode |
(iv) | Process | [D] | Electrolyte |
A)
(i-C), (ii-D), (iii-B), (iv-A) done
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B)
(i-C), (ii-A), (iii-D), (iv-B) done
clear
C)
(i-A), (ii-C), (m-D), (iv-B) done
clear
D)
(i-A), (ii-B), (iii-C), (iv-D) done
clear
E)
None of these done
clear
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question_answer34)
Number of images formed is three when two plane mirrors are inclined at angle of:
A)
(a)\[{{60}^{o}}\] done
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B)
\[{{30}^{o}}\] done
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C)
\[{{90}^{o}}\] done
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D)
\[{{25}^{o}}\] done
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E)
None of these done
clear
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question_answer35)
An instrument which works by producing multiple reflections from plane mirrors and forms beautiful patterns is:
A)
Periscope done
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B)
Telescope done
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C)
Kaleidoscope done
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D)
Pinhole camera done
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E)
None of these done
clear
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question_answer36)
Which one of the following eye parts can change the focal length of the eye-lens according to the requirements of the eye to see distant objects or nearby objects?
A)
Retina done
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B)
Ciliary muscles done
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C)
Pupil done
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D)
Cornea done
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E)
None of these done
clear
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question_answer37)
____ is the screen on which the image is formed in the eye.
A)
Iris done
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B)
Pupil done
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C)
Retina done
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D)
Eye-lens done
clear
E)
None of these done
clear
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question_answer38)
Glowing of bulb when current passes through it is an example of:
A)
Chemical effect of electric current. done
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B)
Heating effect of electric current. done
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C)
Magnetic effect of electric current. done
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D)
All the above done
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E)
None of these done
clear
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question_answer39)
______ adjusts the size of ____ according to the intensity of light received by the eye from the surroundings.
A)
Retina, pupil done
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B)
Iris, retina done
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C)
Iris, pupil done
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D)
Pupil, Iris done
clear
E)
None of these done
clear
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question_answer40)
Which one of the following statements is correct?
A)
Anvil is a part of human eye. done
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B)
Space between cornea and eye-lens is filled with aqueous humour. done
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C)
Space between eye-lens and retina is filled with vitreous humour. done
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D)
Both [b] and [c] done
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E)
None of these done
clear
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