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Chemical Effects of Electric Current

Chemical Effects of Electric Currents

16 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following non-metals can be electroplated with copper?

  1. Sodium
  2. Iodine
  3. Silicon
  4. Carbon
  5. Phosphorus
Question 2 Multiple Choice (Single Answer)

A weak electrolyte is a weak conductor of electricity because it contains lesser number of ions. Which of the following is a weak electrolyte?

  1. Nitric acid solution
  2. Sodium hydroxide solution
  3. Potassium hydroxide solution
  4. Silver nitrate solution
  5. Ammonium chloride solution
Question 3 Multiple Choice (Single Answer)

Which one of the following solutions is taken as an electrolyte if we want to electroplate an iron object with copper metal?

  1. Copper nitrate solution
  2. Copper sulphate solution
  3. Copper cyanide solution
  4. Copper oxochloride solution
  5. None of the above
Question 4 Multiple Choice (Single Answer)

Which of the following statements is/are false:
a. A solution of sulphuric acid or hydrochloric acid in water conducts electricity.
b. The materials that do not allow electric current to pass through them are called poor conductors of electricity.
c. A solution of copper sulphate or sodium chloride in water will not conduct electricity.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 5 Multiple Choice (Single Answer)

Which of the following metals are produced by passing electric current through their compounds in molten state?

A. Aluminium

B. Copper

C. Magnesium

D. Iron

  1. A and B
  2. B and C
  3. C and D
  4. A and C
  5. B and D
Question 6 Multiple Choice (Single Answer)

Which of the following solutions is a good conductor of electricity?

  1. Glucose solution
  2. Lemon juice
  3. Alcohol solution
  4. Distilled water
  5. Vegetable oil
Question 7 Multiple Choice (Single Answer)

Which of the following statements is/are false:
a. In a solid like copper metal, electricity is carried by electrons but in a liquid like copper sulphate solution, electricity is carried by copper and sulphate ions.
b. If electricity is passed through a solid or a liquid, then no chemical change takes place.
c. The liquids which conduct electricity are called conducting liquids.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 8 Multiple Choice (Single Answer)

Which of the following is/are methods to make distilled water conduct electricity?
a. By dissolving some common salt in it.
b. By adding acid like dilute sulphuric acid in it
c. By adding base like sodium hydroxide in it.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. a, b and c
Question 9 Multiple Choice (Single Answer)

Which of the following statements is/are false:
a. Electrolytes are better conductors of electricity than the metals.
b. An arrangement with two electrodes, that is kept in a conducting liquid in a vessel is called an electrolytic cell.
c. A strong electrolyte is a solution which conducts electricity very well because it contains a lot of ions in it.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 10 Multiple Choice (Single Answer)

If an electric current is passed through acidified water by using carbon electrodes, then a chemical reaction takes place to form ________________ and oxygen.

  1. methane
  2. hydrogen
  3. nitrogen
  4. helium
  5. carbon dioxide
Question 11 Multiple Choice (Single Answer)

Which of the following is not used for electroplating any metal?

  1. Gold
  2. Silver
  3. Sodium
  4. Nickel
  5. Copper
Question 12 Multiple Choice (Single Answer)

Match the following:
a. Electrolyte 1. A positively charged electrode
b. Anode 2. A liquid which can conduct electricity
c. Cathode 3. A negatively charged electrode
  1. a – 2, b – 1, c – 3
  2. a – 2, b – 3, c – 1
  3. a – 1, b – 2, c – 3
  4. a – 1, b – 3, c – 2
  5. a – 3, b – 1, c – 2
Question 13 Multiple Choice (Single Answer)

Which of the following is/are the applications of the chemical effects of electric current in industries?
a. Electroplating of metals
b. Purification of metals
c. Production of chemical compounds
d. Decomposing chemical compounds

  1. a and b
  2. b and c
  3. a, b and c
  4. a and d
  5. all of the above
Question 14 Multiple Choice (Single Answer)

Which of the following is the strongest electrolyte?

  1. Rain water
  2. Carbonic acid solution
  3. Acetic acid solution
  4. Citric acid solution
  5. Hydrochloric acid solution
Question 15 Multiple Choice (Single Answer)

Which of the following is/are the conditions that should be taken into consideration while electroplating?
a. The metal object on which electroplating is to be done should be made using the negative electrode.
b. The metal whose layer is to be deposited should be made using the positive electrode.
c. A water soluble salt of the metal should be deposited if taken as an electrolyte.

  1. Only a
  2. Only a and b
  3. Only b and c
  4. Only c
  5. All of the above
Question 16 Multiple Choice (Single Answer)

Which of the following statements is/are false?
a. The chemical decomposition produced by passing an electric current through a conducting liquid is called electrolysis.
b. Sodium metal is produced by the electrolysis of molten sodium carbonate.
c. Fresh fruits and vegetables conduct electricity to some extent due to the presence of various salt solutions in them.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
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