Electrolytic Cell

Q.

What is the construction and working of dropping mercury electrodes?

Q.

The cut-in voltage for silicon diode is approximately _____.

Q.

Explain electroplating with chemical equations.

Q. Zinc and copper rods are dipped into sulphuric acid and connected externally through a metal wire. Choose the correct statements.

1. Zinc slowly begins to dissolve into the acid.
2. Copper slowly begins to dissolve into the acid.
3. Bubbles are seen near the copper rod.
4. Bubbles are seen near the zinc rod.

Q. Distilled water can be used as an electrolyte in electrolysis.

1. True
2. False

Q.

Q) Mercury is a liquid and conducts electricity . Do you think it is an electrolyte?( Hint : Mercury is a metal that is a liquid at room temperature)

Ans) No, though mercury is a liquid at room temperature it is a metal . It cannot be an electrolyte. This is because most of the liquids that can conduct electricity or acids bases and salts whereas mercury is a metal.

Could you please check my answer.

Q. The amount of zinc required to produce 1.12 ml of H2 at STP on treatment with dilute HCL will be

Q. Which of the following gases are released during electrolysis of water?

1. Hydrogen and oxygen
2. Hydrogen and chlorine
3. Oxygen and chlorine
4. Chlorine and nitrogen

Q.

What are the three main parts of a battery?

Q.

An electrolytic cell consists of (i) positively charged cathode (ii) negatively charged anode (iii) positively charged anode (iv) negatively charged cathode

1. (i) and (ii)

2. (iii) and (iv)

3. (i) and (iii)

4. (ii) ad (iv)

Q. Which of the following energy conversions takes place in the electrolysis method?

1. Chemical $\to$ light
2. Chemical $\to$ electrical
3. Electrical $\to$ chemical
4. Electrical $\to$ light

Q. Why is chromium plated on objects like car parts, bath taps, kitchen gas burners, bicycle handlebars, wheel rims etc.?

1. To prevent corrosion
2. To prevent the attack of germs on the object's surfaces
3. To make objects scratch resistant
4. To prevent getting things dirty

Q. I have a doubt whether this lesson"chemical effects of electric current" is physics or chemistry?
in school chemistry
In byjus physics
Don't give me as rellavent question already I got that reply

Q. During electrolysis why is it important to have the electrodes dipped in electrolyte

Q.

A beaker contains an acidified copper sulphate solution. A copper plate and a carbon rod are kept in this copper sulphate solution. The copper plate is connected to the positive terminal of a battery whereas the carbon rod is connected to the negative terminal of the battery. What will you observe when an electric current is passed through this set-up for a considerable time?

Q.

Q) Copper conducts electricity through electrons whereas salts solution conducts electricity through ions. Do you agree?

Could you please give me the answer for this.

Q. Why does electroplating happens to the metal connected with the negative terminal ?
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Q. If we allow current to pass through the given set up for some time, which of the following can be observed?

1. Copper gets deposited on the electrode connected to the positive terminal of the battery.

2. Copper gets dissolved into the solution from electrode connected to negative terminal.

3. Copper gets deposited on the electrode connected to the negative terminal of the battery.

4. Copper residues settle in the electrolyte.

Q.

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?

Q.

Rajat collected some rainwater in a clean glass tumbler and tested it using a tester. To his surprise he found that the compass needle showed deflection. What could be the possible reason for his observation? [3 MARKS]

Q. Which of the following can be used as the electrolyte in place of sulphuric acid in the Volta cell?

1. Tap water
2. Tamarind juice
3. Salt water
4. All of the above.

Q.

The process of depositing a layer of any desired metal on another material by means of electricity is called __________________.

Q.

Name the charge carriers when electricity flows through

A) A Metal

B) An Electrolyte

Q. Which of the following can be used as an electrolyte during copper plating?

1. Copper sulphate
2. Sodium chloride
3. Iron sulphate
4. Hydrochloric acid

Q. Which of the following was used as the electrolyte in the Volta cell?

1. Sulphuric acid
2. Copper sulphate solution
3. Phosphoric acid
4. Hydrogen peroxide

Q.

The ions that are attracted towards the negative electrode and discharged are called ________

Q. What happens when a slice of potato is connected to an LED and a battery for a long time as shown in the figure below?

1. A greenish blue spot forms on the potato where wire A is connected.
2. The LED glows.
3. A greenish blue spot forms on the potato where wire B is connected.
4. The LED doesn't glow.

Q. Dilute sulphuric acid (as an electrolytic solution) would split into which of the following group of ions?

1. Oxygen ions and hydrogen ions
2. Oxygen ions, hydrogen ions and sulphur ions
3. Hydrogen ions, oxygen ions and sulphate ions
4. Hydrogen ions and sulphate ions

Q. Copper rod acts as an electrolyte in the Volta cell.

1. True
2. False

Q. What is the total type of ions present in the aqueous solution of (i) potassium sulphate ? (ii) potassium chloride ?