The Question is from neet-botany biodiversity taxonomic-categories, and it was created by the author NISHANTH

Question

Which of the following statements regarding universal rules of nomenclature is wrong?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
	**Primary Concept**: Chemical Nomenclature
	**Related Topics**: Ionic Compounds, Molecular Compounds, Oxidation States, Polyatomic Ions
	**Prerequisites**: Basic Chemistry
## SOLUTION PATHWAY
**Given Information**:
	Four statements about nomenclature rules.
**Method & Steps**:
	1. Analyze each statement for its validity based on nomenclature rules.
	2. Identify the incorrect statement.
## OPTION ANALYSIS
[A] ✓: Cations are named first, followed by anions. This is a fundamental rule in naming ionic compounds.
[B] ✓: The oxidation state of a metal is indicated by a Roman numeral in parentheses when necessary. This applies to metals with variable oxidation states, like iron (Fe(II) and Fe(III)).
[C] ✓: Numerical prefixes are used to denote the number of atoms of each element in a molecular compound. Examples include 'mono', 'di', 'tri', 'tetra', etc.
[D] :x: The suffix '-ide' is always used for the second element in a binary compound. This is incorrect. While '-ide' is commonly used for monatomic anions in binary ionic compounds (e.g., sodium chloride), it is not used for the second element in binary molecular compounds when that element is oxygen.  For example, it's carbon monoxide, not carbon monooxide, and carbon dioxide, not carbon diooxide. Also, in binary compounds containing polyatomic anions, the anion often retains its name, which might not end in '-ide' (e.g., sodium nitrate).
## LEARNING AIDS
	**Common Mistakes**:
		1. Overgeneralizing the '-ide' rule: Remember the exceptions for oxides and polyatomic ions.
		2. Confusing the rules for ionic and molecular compounds: Pay attention to the types of elements involved.
	**Quick Tips**:
		1. Review the rules for naming both ionic and molecular compounds.
		2. Practice naming various compounds to solidify your understanding.

NISHANTH · Answer

Cations are named first, followed by anions.

NISHANTH · Answer

The oxidation state of a metal is indicated by a Roman numeral in parentheses when necessary.

NISHANTH · Answer

Numerical prefixes are used to denote the number of atoms of each element in a molecular compound.

NISHANTH · Answer

The correct Option is "The suffix '-ide' is always used for the second element in a binary compound."

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