Question

Which equation describes a reduction?
Upper M g (s) right arrow Uper M g superscript 2 plus (a q) plus 2 e superscript minus.
2 upper C l plus 2 e superscript minus right arrow 2 upper C l superscript minus.
Upper N a (s) right arrow upper N a superscript plus (a q) plus e superscript minus.
Upper A l (s) right arrow upper A l superscript 3 plus (a q) plus 3 e superscript minus.

Answer 1

Which equation describes a reduction?

These are the correct form of equations of your options:

1. Mg(s) -> Mg²⁺ (aq) + 2e⁻
2. 2Cl + 2e⁻ -> 2Cl⁻
3. Na(s) -> Na⁺(aq)  + e⁻
4. Al(s) -> Al³⁺(aq) + 3e⁻

In all these examples,there is either oxidation happening or reduction.

• Oxidation is the loss of electrons. It happens when an atom or compound loses one or more electrons.

• Reduction is the opposite of oxidation.
• Reduction is the process of gaining one or more electrons.In this,one atom or compound will steal electrons from another atom or compound.

In option 1. , 3. and 4. magnesium(Mg), sodium(Na) and aluminium(Al) gets oxidised as all lose one or more electron.

• Mg oxidises to Mg²⁺ and loses 2 electrons.

• 2Cl reduces to 2Cl⁻ and gains 1 electrons each.

• Na oxidises to Na⁺ and loses 1 electrons.

• Al oxidises to Al³⁺ and loses 3 electrons.

Therefore, option 2.  is correct as this equation is undergoing reduction.

Answer 2

Answer:

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Explanation: