NTSE SAT Physics Electricity Chemical Effect Of Current MCQs

Question: Faraday constant F, Avogadro number N and electronic charge e are related with each other by “

• a)

  

• b)

  

• c) F = Ne
• d)

  F = N e²

Answer: F = Ne

Question: On passing a charge of 2 Faraday through a copper volt ammeter, the mass of copper ions liberated will be :

• a) 128 g
• b) 16 g
• c) 32 g
• d) 64 g

Answer: 16 g

Question: How much electricity must pass through acidulated water to release 22,400 cm3 of hydrogen at N.T.P. ? 

• a) 96500 C
• b) 193000 C
• c) 22.4 C
• d) 95.5 C

Answer: 95.5 C

Question: Faraday constant :

• a) Depends on the amount of the electrolyte
• b) Depends on the current in the electrolyte
• c) Is a universal constant
• d) Depends on the amount of charge passed through the electrolyte.

Answer: Is a universal constant

Question: Examples of primary cells are :

• a) Voltaic
• b) Daniel
• c) Dry cell
• d) All of them

Answer: All of them

Question: Which is not true for electrolysis :

• a) Electrolysis is used for depositing thin layer of one metal on other
• b) Electrolysis is used for manufacturing some gases and compounds
• c) Electrolysis can be used for refining of metals
• d) Electrolysis can be used for plating of metals like gold & silver on other metals

Answer: Electrolysis is used for manufacturing some gases and compounds

Question: S.I. unit of electro chemical equivalent is :

• a) kg/C
• b) g/C
• c) C
• d) A

Answer: kg/C

Question: Which is true for electrolysis :

• a) Electrolysis is used for depositing thin layer of one metal on other
• b) Electrolysis is used for manufacturing some gases and compounds.
• c) Electrolysis can be used for refining of metals
• d) All are correct

Answer: Electrolysis can be used for refining of metals

Question: Examples of primary cells are :

• a) Voltaic
• b) Daniel
• c) Dry cell
• d) All of them

Answer: All of them

Question: On passing a charge of 2 Faraday through a copper volt ammeter, the mass of copper ions liberated will be :

• a) 128 g
• b) 16 g
• c) 32 g
• d) 64 g

Answer: 16 g