Ncert Solutions Chemistry Class 11th
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<p><strong>Assertion and Reason:</strong></p>
<p><strong>Directions:</strong></p>
<p><strong>(a) </strong>Assertion and reason both are correct statements and reason is correct explanation for assertion.</p>
<p><strong>(b) </strong>Assertion and reason both are correct statements but reason is not correct explanation for assertion.</p>
<p><strong>(c) </strong>Assertion is correct statement but reason is wrong statement.</p>
<p><strong>(d) </strong>Assertion is wrong statement but reason is correct statement.</p>
<p> </p>
<p><strong>11.39. Assertion: Non-metals readily form anions, in contrast to metals whichreadily form cations. </strong></p>
<p><strong>Reason: In general, non-metals have higher ionisation enthalpies and higherelectronegativities than the metals.</strong></p>
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8.45. What do you understand by Standard Electrode Potential? Explain.
8.45. What do you understand by Standard Electrode Potential? Explain.
The potential associated with each electrode is known as electrode potential. If the concentration of each species taking part in the electrode reaction is unity (if any gas appears in the electrode reaction, it is confined to 1 atmospheric pressure) and further there action is carried out at 298K,
Upvote 
8.44. What are the methods of balancing redox reactions.
8.44. What are the methods of balancing redox reactions.
Two methods are used to balance chemical equations for redox processes. One of these methods is based on the change in the oxidation number of reducing agent and the oxidising agent (i.e. oxidation number method) and the other method is based on splitting the redox reaction into two half reactions —
Upvote (a) Combination reactions (b) Decomposition reactions (c) displacement reactions (d) Disproportionation reactions.
Upvote 8.42. What is meant by electrochemical series? What are the characteristics of electrochemical series?
8.42. What is meant by electrochemical series? What are the characteristics of electrochemical series?
Electrochemical series is the series of elements in which elements are arranged in decreasing order of their reduction potential.
Reducing power goes on increasing whereas oxidising power goes on decreasing down the series.
Upvote Questions and Answers:
8.41. Define electrochemical cell. How will you identify cathode and anode in an electrochemical cell?
Questions and Answers:
8.41. Define electrochemical cell. How will you identify cathode and anode in an electrochemical cell?
Electrochemical cell is a device in which the redox reaction is carried indirectly and the decrease in free energy appears as electrical energy.
At cathode there is gain of electrons.
At anode there is loss of electrons.
In electrochemical cell anode is written on L.H.S while cathode is written on R.H.
Upvote 8.39. Choose the incorrect statement.
(a) A redox couple consists of oxidised and reduced form of the same substance taking part in the oxidation or reduction half reaction.
(b) Oxidation involves gain of one or more electrons by a species during a reaction.
(c) Half reactions that involve loss of electrons are called oxidation reactions.
(d) Half reactions that involve gain of electrons are called reduction reactions.
8.39. Choose the incorrect statement.
(a) A redox couple consists of oxidised and reduced form of the same substance taking part in the oxidation or reduction half reaction.
(b) Oxidation involves gain of one or more electrons by a species during a reaction.
(c) Half reactions that involve loss of electrons are called oxidation reactions.
(d) Half reactions that involve gain of electrons are called reduction reactions.
(b) Oxidation involves gain of one or more electrons by a species during a reaction.
Upvote