NEET Chemistry Electrochemistry / विद्युत् रसायन Question Bank

done Question - Assertion Reason Total Questions - 28

• question_answer1)

  Assertion: Sodium ions are discharged in preference to hydrogen ions at a mercury cathode.

  Reason: The nature of the cathode can effect the order of discharge of ions.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
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• question_answer2)

  Assertion: In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is different from that required for 1 mole of copper.

  Reason: The molecular weights of silver and copper are different

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
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• question_answer3)

  Assertion: Equivalent conductance of all electrolytes decreases with the increases in concentration.

  Reason: Lesser number of ions are available per gram equivalent at higher concentration.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer4)

  Assertion: Copper reacts with hydrochloric acid and liberates hydrogen from the solution of dilute hydrochloric acid.

  Reason: Hydrogen is below copper in the electrochemical series.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer5)

  Assertion: Copper liberates hydrogen from a solution of dil. HCl.

  Reason: Hydrogen is below copper in the reactivity series.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
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• question_answer6)

  Assertion: Zn metal is formed when a Cu plate in dipped in \[ZnS{{O}_{4}}\] solution.

  Reason: Cu being placed above Zn in electrochemical series.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer7)

  Assertion: Electrical conductivity of copper increases with increase in temperature.

  Reason: The electrical conductivity of metals is due to the motion of electrons.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer8)

  Assertion: A small amount of acid or alkali is added before electrolysis of water.

  Reason: Pure water is weak electrolyte.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer9)

  Assertion: Copper reacts with HCl and liberates hydrogen.

  Reason: Hydrogen is present above Cu in the reactivity series.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer10)

  Assertion: K and Cs are used in photoelectric cells.

  Reason: K and Cs emit electrons on exposure to light.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer11)

  Assertion: A large dry cell has high e.m.f.

  Reason: The e.m.f. of a dry cell is proportional to its size.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer12)

  Assertion: The resistivity for a substance is its resistance when its is one meter long and its area of cross section is one square meter.

  Reason: The SI uints of resistivity are ohm metre \[(\Omega \,m)\]and ohm centimeter \[(\Omega \ cm)\].

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer13)

  Assertion: When acidified zinc sulphate solution is electrolysed between zinc electrodes, it is zinc that is deposited at the cathode and hydrogen evolution does not take place.

  Reason: The electrode potential of zinc is more negative than hydrogen as the overvoltage for the hydrogen as the evolution on zinc is quite large.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer14)

  Assertion: If \[\lambda _{N{{a}^{+}}}^{0}+\lambda _{C{{l}^{-}}}^{0}\] are molar limiting conductivity of the sodium and chloride ions respectively, then the limiting molar conducting for sodium chloride is given by the equation: \[\wedge _{NaCl}^{0}=\lambda _{N{{a}^{+}}}^{0}+\lambda _{C{{l}^{-}}}^{0}\].

  Reason: This is according to Kohlrausch law of independent migration of ions.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer15)

  Assertion: One coulomb of electric charge deposits weight equal to the electrochemical equivalent of the substance.

  Reason: One Faraday deposits one mole of the substance.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer16)

  Assertion: Auric chloride \[(AuC{{l}_{3}})\]solution cannot be stored in a vessel made of copper, iron, nickel, chromium, zinc or tin.

  Reason: Gold is a very precious metal.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer17)

  Assertion: For a cell reaction\[Zn(s)+C{{u}^{2+}}(aq)\to \] \[Z{{n}^{2+}}(aq)+Cu(s)\]; at the equilibrium, voltmeter gives zero reading.

  Reason: At the equilibrium, there is no change in the concentration of \[C{{u}^{2+}}\]and \[Z{{n}^{2+}}\] ions.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer18)

  Assertion: A negative value of standard reduction potential means that reduction take place on this electrode with reference to standard hydrogen electrode.

  Reason: The standard electrode potential of a half cell has a fixed value.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
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• question_answer19)

  Assertion: Weston is a standard cell.

  Reason: Its e.m.f. does not change with temperature.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer20)

  Assertion: Galvanic cells containing hydrogen, methane, methanol etc. as fuels are called fuel cells.

  Reason: They are designed to convert the energy of combustion of fuels directly into electrical energy.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer21)

  Assertion: Zinc displaces copper from copper sulphate solution.

  Reason: The \[{{E}^{0}}\]of zinc is \[-0.76\ V\]and that of copper is \[+0.34\ V\].

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer22)

  Assertion: Identification of cathode and anode is done by the use of a thermometer.

  Reason: Higher is the value of reduction potential, greater would be its reducing power.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer23)

  Assertion: An electrochemical cell can be set up only if the redox reaction is spontaneous.

  Reason: A reaction is spontaneous if free energy change is negative.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer24)

  Assertion: Galvanised iron does not rust.

  Reason: Zinc has a more negative electrode potential than iron.         [AIIMS 2005]

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer25)

  Assertion: In an electrochemical cell anode and cathode are respectively negative and positive electrodes.

  Reason: At anode oxidation takes place and at cathode reduction takes place.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer26)

  Assertion: \[Ni/N{{i}^{2+}}\,(1.0M)||A{{u}^{3+}}(1.0M)|Au\], for this cell emf is 1.75 V if \[E_{A{{u}^{3+}}/Au}^{o}=1.50\,\] and \[E_{N{{i}^{2+}}/Ni}^{o}=0.25V\].

  Reason: Emf of the cell \[=E_{\text{cathode}}^{o}-E_{\text{anode}}^{o}\].

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer27)

  Assertion: Salts like \[KCl,\,KN{{O}_{3}}\] i.e., inert electrolytes are used in salt bridge.

  Reason: An inert electrolyte can easily be filled in the U-tube.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
  If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer28)

  Assertion: Emf and potential difference are same for cell.

  Reason: Both gives the difference in electrode potential under any condition.

  Read the assertion and reason carefully to mark the correct option out of the options given below:

  A)
  If both assertion and reason are true and the reason is the correct explanation of the assertion.\ done clear
  B)
  If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
   If assertion is true but reason is false. done clear
  D)
  If the assertion and reason both are false. done clear
  E)
  If assertion is false but reason is true. done clear
  View Solution play_arrow