The Question is from neet-botany , and it was created by the author D VINOD

Question

Which of the following is an example of nutrient in its reduced form?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Oxidation states and reduction
	**Related Topics**: Redox reactions, chemical bonding, electronegativity
	**Prerequisites**: Understanding of oxidation states, basic knowledge of chemical formulas, and definition of reduction.
## SOLUTION PATHWAY
**Given Information**:
	The question asks for a nutrient in its *reduced* form.
	The provided options are chemical compounds where the nutrient is bonded to another element.
**Method & Steps**:
	1. **Define Reduction**: Reduction is the gain of electrons, which results in a decrease in oxidation state.
		Reasoning: We need to find the element that has the lowest oxidation state in the given compounds.
	2. **Determine Oxidation States**:  We need to calculate the oxidation state of the given element in each compound. Oxygen is usually -2, hydrogen is +1.
		Working: 
		A. In H2O: Hydrogen is +1, so its oxidation state is +1.
		B. In CO2: Oxygen is -2, so carbon is +4.
		C. In NH3: Hydrogen is +1, so nitrogen is -3.
		D. In SO2: Oxygen is -2, so sulfur is +4.
	3. **Identify Reduced Form**: The reduced form of an element will have the lowest oxidation state.
		Result: Comparing the calculated oxidation states, Nitrogen in NH3 (-3) has the lowest oxidation state.
		Verification: The reduced form of nitrogen is indeed NH3.
## OPTION ANALYSIS
[A] :x: Hydrogen in H2O has an oxidation state of +1, not a reduced state. 
[B] :x: Carbon in CO2 has an oxidation state of +4, which is oxidized, not reduced.
[C] ✓: Nitrogen in NH3 has an oxidation state of -3, indicating it has gained electrons and is thus in a reduced form.
[D] :x: Sulphur in SO2 has an oxidation state of +4, which is oxidized, not reduced.
## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing oxidation and reduction. Remember OIL RIG (Oxidation Is Loss, Reduction Is Gain).
		2.[Error 2]: Incorrectly calculating oxidation states, pay close attention to the charges and number of atoms.
	**Quick Tips**:
		1.[Helpful shortcut]: Memorize common oxidation states of elements like oxygen (-2), hydrogen (+1) and alkali metals (+1).
		2.[Memory aid]: A lower oxidation state means the atom has gained electrons, hence it is reduced.

D VINOD · Answer

Hydrogen in ${H_2}O$

D VINOD · Answer

Carbon in $C{O_2}$

D VINOD · Answer

The correct Option is "Nitrogen in $N{H_3}$"

D VINOD · Answer

Sulphur in $S{O_2}$

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