Practice free Electrochemistry (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
In the electrochemical process of iron corrosion, where do the electrons released from the anodic spot go?
The context explains: 'Electrons released at anodic spot move through the metal and go to another spot on the metal and reduce oxygen in the presence of H+'. (Refer to the detailed explanation of iron corrosion chemistry).
The object mentions that the efficiency of thermal plants is about 40%. While not directly related to corrosion, what is a key advantage of fuel cells mentioned that could address this limitation?
The context mentions fuel cells with respect to efficiency improvements and then states: 'Fuel cells are pollution free and in view of their future importance, a variety of fuel cells have been fabricated and tried.' While efficiency is implied, 'pollution free' is the explicit direct advantage mentioned. (Refer to the paragraph before the 'Corrosion' section).
Which of the following explains why the chemistry of corrosion is considered an 'electrochemical phenomenon'?
The text explicitly states: 'The chemistry of corrosion is quite complex but it may be considered essentially as an electrochemical phenomenon. At a particular spot... oxidation takes place and that spot behaves as anode... Electrons released at anodic spot move through the metal and go to another spot on the metal and reduce oxygen... This spot behaves as cathode'. This clearly describes an electrochemical cell with distinct anodic and cathodic reactions and electron flow. The objectives section also mentions 'explain corrosion as an electrochemical process'. (Refer to the 'Corrosion' section and 'Objectives').
Which of the following describes the function of a secondary battery?
According to the NCERT text, 'A secondary cell after use can be recharged by passing current through it in the opposite direction so that it can be used again.' This allows it to be used multiple times.
What is the approximate cell potential of a mercury cell and how does it behave during its lifespan?
The NCERT text states: 'The cell potential is approximately 1.35 V and remains constant during its life as the overall reaction does not involve any ion in solution whose concentration can change during its lifetime.'
Which of the following statements is true regarding fuel cells?
The NCERT text defines fuel cells as 'Galvanic cells that are designed to convert the energy of combustion of fuels like hydrogen, methane, methanol, etc. directly into electrical energy are called fuel cells.'
In a lead storage battery, what acts as the anode and cathode during discharge?
The NCERT text states: 'It consists of a lead anode and a grid of lead packed with lead dioxide (PbO$_{2}$) as cathode.'
What is the electrolyte used in a lead storage battery?
The NCERT text mentions: 'A 38% solution of sulphuric acid is used as an electrolyte' in the lead storage battery.
What is the overall reaction that occurs during the discharge of a lead storage battery?
The NCERT text provides the 'overall cell reaction consisting of cathode and anode reactions' during use (discharge) as: Pb(s) + PbO$_{2}$(s) + 2H$_{2}$SO$_{4}$(aq) $\rightarrow$ 2PbSO$_{4}$(s) + 2H$_{2}$O(l).
During the charging of a lead storage battery, what happens to the products formed during discharge?
The NCERT text states: 'On charging the battery the reaction is reversed and PbSO$_{4}$(s) on anode and cathode is converted into Pb and PbO$_{2}$, respectively.'
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.