Chemistry Btech 1st Year. We covered all the Chemistry Btech 1st Year MCQs in this post for free so that you can practice well for the exam.
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Chemistry Btech 1st Year Objective for Students
In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to:
(a) Generate heat.
(b) Create a potential difference between the two electrodes.
(c) Produce high-purity water.
(d) Remove absorbed oxygen from electrode surfaces.
Option b – Create a potential difference between the two electrodes
The advantages of using a fuel cell in a motor car could be:
(a) Low initial cost.
(b) Emission-less operation.
(c) Lightweight.
(d) Freedom from refueling.
Option b – Emission-less operation
The depolarization in a primary cell is used for the purpose of:
(a) Increasing the life of the cell.
(b) Increasing the emf of the cell.
(c) Removing the hydrogen collected at one of the plates.
(d) Removing the dipoles from the electrolytes.
Option b – Increasing the emf of the cell
In an electrochemical cell that functions as a voltaic cell:
(a) Electrons move from the cathode to the anode.
(b) Electrons move through a salt bridge.
(c) Electrons can move either from the cathode to the anode or from the anode to the cathode.
(d) Reduction occurs at the cathode.
Option d – Reduction occurs at the cathode
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