Question 1 :
One of the most common applications of chemical effect of electric current is __________.
Question 2 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d058f59b460d7261f2d2.PNG' />
In the above image, which of the following solutions will not make the bulb glow?
Question 3 :
Small amount of a mineral salt present naturally in water makes it a ____________ of electricity.
Question 4 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d057f59b460d7261f2d0.PNG' />
In the image above, Boojho set up this circuit for purification of copper. What will be the nature of the solution?
Question 5 :
Which of the following metals is used in electroplating to make objects appear shining?
Question 6 :
A coating of zinc is provided to protect iron from corrosion and rust.
Question 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d050f59b460d7261f2c7.PNG' />
Current does not flow in the circuit if there is a gap between the two wires. Does air never conduct electricity?
Question 8 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d059f59b460d7261f2d3.PNG' />
From the above image, we can see that Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B. They found that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that
Question 9 :
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
Question 10 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05cf59b460d7261f2d7.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05cf59b460d7261f2d6.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 12 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d051f59b460d7261f2c9.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. What will be observed if the number of cells are increased in the circuit shown in B?
Question 13 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05cf59b460d7261f2d7.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 14 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d055f59b460d7261f2ce.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. What does the deflection in magnetic compass indicate?
Question 15 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d050f59b460d7261f2c8.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. Why did the bulb not glow in A?
Question 16 :
Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory
Question 17 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d058f59b460d7261f2d1.PNG' />
Current does not flow in the circuit if there is a gap between the two wires. Does it indicate that air is a poor conductor of electricity?
Question 18 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d054f59b460d7261f2cd.PNG' />
In the image above, Boojho set up this circuit for purification of copper. What will be the nature of plate B?
Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d051f59b460d7261f2c9.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. What will be observed if the number of cells are increased in the circuit shown in B?
Question 20 :
A coating of zinc is provided to protect iron from corrosion and rust.
Question 21 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d058f59b460d7261f2d1.PNG' />
Current does not flow in the circuit if there is a gap between the two wires. Does it indicate that air is a poor conductor of electricity?
Question 23 :
Electroplating of ______________ is done on objects like water taps and cycle bell to give them a shiny appearance.
Question 25 :
Heating effect of electric current is the effect of current responsible for the glow of the bulb in an electric circuit.
Question 27 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d053f59b460d7261f2cb.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. What would be the effect of increase in the number of turns in the coil wound around the magnetic compass in B?
Question 29 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05ff59b460d7261f2da.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 31 :
Which of the following metals is used in electroplating to make objects appear shining?
Question 33 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d056f59b460d7261f2cf.PNG' />
In the image above, Boojho set up this circuit for purification of copper. What will be the nature of plate A?
Question 34 :
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
Question 35 :
Electroplating of ______________ is done on objects like water taps and cycle bell to give them a shiny appearance.
Question 36 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d059f59b460d7261f2d3.PNG' />
From the above image, we can see that Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B. They found that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that
Question 37 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d053f59b460d7261f2cb.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. What would be the effect of increase in the number of turns in the coil wound around the magnetic compass in B?
Question 38 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d050f59b460d7261f2c8.PNG' />
In the above image, observing that the bulb does not glow in the circuit shown in A, Boojho changed the circuit as shown in B. He observed deflection in the magnetic compass. Why did the bulb not glow in A?
Question 39 :
Small amount of a mineral salt present naturally in water makes it a ____________ of electricity.
Question 40 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d058f59b460d7261f2d2.PNG' />
In the above image, which of the following solutions will not make the bulb glow?
Question 41 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05ef59b460d7261f2d9.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 43 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d056f59b460d7261f2cf.PNG' />
In the image above, Boojho set up this circuit for purification of copper. What will be the nature of plate A?
Question 44 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d054f59b460d7261f2cd.PNG' />
In the image above, Boojho set up this circuit for purification of copper. What will be the nature of plate B?
Question 45 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05ef59b460d7261f2d9.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 46 :
Heating effect of electric current is the effect of current responsible for the glow of the bulb in an electric circuit.
Question 48 :
One of the most common applications of chemical effect of electric current is __________.
Question 49 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05cf59b460d7261f2d6.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
Question 50 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d05ff59b460d7261f2da.PNG' />
In the image above, will the bulb glow. Write ‘Yes’ or ‘No’
