Oxidation is the A. gain of protons. B loss of protons. C. gain of electrons. 1.
ID: 706087 • Letter: O
Question
Oxidation is the A. gain of protons. B loss of protons. C. gain of electrons. 1. D. loss of electrons 2. During a redox reaction, the oxidation number of the species reduced will A. increase. B. decrease. C. remain the same. 3. What always occurs at the cathode in an electrolytic cell? C. Electrons are gained D. Electrons are lost A. Protons are gained B. Protons are lost The reducing agent is A. the species that is reduced. C. the species that loses electrons.D the species that gains electrons. 4. B. the species with a negative charge. 5. What always travels through the salt bridge in a voltaic cell? A. Protons B. Electron C. Neutrons D. Ions 6. What always travels through the external circuit (wire) in a voltaic cell? D. Ions A. Protons B. Electrons C. NeutronsExplanation / Answer
Q-(1) Ans:D loss of electrons
Explanation: Oxidation is the loss of electrons
Q-(2) Ans:B decrease
Explanation: The species which is reduced gains electrons, so its oxidation number decreases. decrease in oxidation state of species in chemical reaction is known as a reduction.
Q-(3) Ans: C. Electrons are gained
Explanation: In an electrolytic cell at cathode reduction takes place, the specie gains electrons and its oxidation number(oxidation state) decreases, due to gain of electrons specie is negatively charged at cathode.
Q-(4) Ans: C. Species that loses electrons
Explanation: Reducing agent means the specie which reduces other specie to reduce other specie it should lose electrons. Reducing agent itself undergoes oxidation by loss of electrons
Q-(5) Ans: D. Ions
Explanation: Always Ions travel through the salt bridge in a voltaic cell.Example for salt bridge is KCl. The function of salt bridge is to provide positive ions (K+ ) and negative ions (Cl-) maintain nutrality in the system by providing enough positive and negative ions during redox reaction.
Q-(6) Ans: B. Electrons
Explanation: Always electrons travel through the external circuit metal wire in a voltaic cell. Electrons are charged particle which are responsible for electricity.
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