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S in SO₂: +4. In SO₃: x + 3(-2) = 0, x = +6, which is higher.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Redox Titrations and Equivalent Weight and Normality
B (group 13, valence 3) and F (group 17, valence 1) form BF₃, a stable covalent compound, unlike BF, BF₂, or B₂F₃.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Modern Periodic Law and Present Form - Long Form Periodic Table
C (group 14, valence 4) and Cl (group 17, valence 1) form CCl₄ by sharing electrons to achieve stable configurations.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Modern Periodic Law and Present Form - Long Form Periodic Table
Neutral oxides do not react with acids or bases. C (group 14) forms CO, a neutral oxide, unlike Na₂O (basic), P₂O₅ (acidic), or Al₂O₃ (amphoteric).
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electronic Configuration and Types of Elements - s p d f Blocks
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