The answer is C, magma. i know lava and magma are the same thing but the correct term is magma. hope this helped, have an amazing day :)
<u>Explanation:</u>
In an electrochemical cell, two half electrochemical processes occur. One of which is oxidation process and other is reduction process.
Oxidation reaction is defined as the reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

Oxidation half reaction occurs at anode and reduction half reaction occurs at cathode.
Half reaction of the overall reaction represents the two processes which occur inside the cell which is oxidation and reduction.
Answer:
See explanation and image attached
Explanation:
This reaction is known as mercuric ion catalyzed hydration of alkynes.
The first step in the reaction is attack of the mercuric ion on the carbon-carbon triple bond, a bridged intermediate is formed. This bridged intermediate is attacked by water molecule to give an organomercury enol. This undergoes keto-enol tautomerism, proton transfer to the keto group yields an oxonium ion, loss of the mercuric ion now gives equilibrium keto and enol forms of the compound. The keto form is favoured over the enol form.
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Answer:
If a solution conducts electricity, it is positive evidence that solute dissolved in solvent is electrolyte.