Number of lone pairs of electrons in the central atom of SCl2, O3, ClF3 and SF6, respectively are

Step-by-Step Solution1. SCl2Central atom: S (Sulfur) Valence electrons on S = 6 Chemical Valency: 2 (forms 2 single bonds with Cl atoms) Electrons used in bonding = 2 × 2 = 4 Remaining electrons = 6 − 2 = 4 → 2 lone pairs2. O3 (Ozone)Central atom: O (Oxygen) Valence electrons on O = 6 Chemical Valency: 2 (forms one single and one double bond) Electrons used in bonding = 3 pairs Remaining electrons = 6 − 3 = 3 pairs (1 lone pair + shared in resonance) → 1 lone pair3. ClF3Central atom: Cl (Chlorine) Valence electrons on Cl = 7 Chemical Valency: 3 (forms 3 single bonds with F) Electrons used in bonding = 3 pairs Remaining electrons = 7 − 3 = 4 → 2 lone pairs4. SF6Central atom: S (Sulfur) Valence electrons on S = 6 Chemical Valency: 6 (forms 6 single bonds with F) Electrons used in bonding = 6 pairs Remaining electrons = 6 − 6 = 0 → 0 lone pairsFinal AnswerNumber of lone pairs on the central atom in SCl2, O3, ClF3, SF6 are: 2, 1, 2, 0 respectively.

Number of lone pairs of electrons in the central atom of SCl2, O3, ClF3 and SF6, respectively are

Step-by-Step Solution1. SCl2Central atom: S (Sulfur) Valence electrons on S = 6 Chemical Valency: 2 (forms 2 single bonds with Cl atoms) Electrons used in bonding = 2 × 2 = 4 Remaining electrons = 6 − 2 = 4 → 2 lone pairs2. O3 (Ozone)Central atom: O (Oxygen) Valence electrons on O = 6 Chemical Valency: 2 (forms one single and one double bond) Electrons used in bonding = 3 pairs Remaining electrons = 6 − 3 = 3 pairs (1 lone pair + shared in resonance) → 1 lone pair3. ClF3Central atom: Cl (Chlorine) Valence electrons on Cl = 7 Chemical Valency: 3 (forms 3 single bonds with F) Electrons used in bonding = 3 pairs Remaining electrons = 7 − 3 = 4 → 2 lone pairs4. SF6Central atom: S (Sulfur) Valence electrons on S = 6 Chemical Valency: 6 (forms 6 single bonds with F) Electrons used in bonding = 6 pairs Remaining electrons = 6 − 6 = 0 → 0 lone pairsFinal AnswerNumber of lone pairs on the central atom in SCl2, O3, ClF3, SF6 are: 2, 1, 2, 0 respectively.

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Number of lone pairs of electrons in the central atom of SCl₂, O₃, ClF₃ and SF₆, respectively are

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2,1,2 and 0

2,1,0 and 2

1,2,2 and 0

0,1,2 and 2

answer is B.

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Detailed Solution

Step-by-Step Solution

1. SCl₂

Central atom: S (Sulfur)
Valence electrons on S = 6
Chemical Valency: 2 (forms 2 single bonds with Cl atoms)
Electrons used in bonding = 2 × 2 = 4
Remaining electrons = 6 − 2 = 4 → 2 lone pairs

2. O₃ (Ozone)

Central atom: O (Oxygen)
Valence electrons on O = 6
Chemical Valency: 2 (forms one single and one double bond)
Electrons used in bonding = 3 pairs
Remaining electrons = 6 − 3 = 3 pairs (1 lone pair + shared in resonance) → 1 lone pair

3. ClF₃

Central atom: Cl (Chlorine)
Valence electrons on Cl = 7
Chemical Valency: 3 (forms 3 single bonds with F)
Electrons used in bonding = 3 pairs
Remaining electrons = 7 − 3 = 4 → 2 lone pairs

4. SF₆

Central atom: S (Sulfur)
Valence electrons on S = 6
Chemical Valency: 6 (forms 6 single bonds with F)
Electrons used in bonding = 6 pairs
Remaining electrons = 6 − 6 = 0 → 0 lone pairs

Final Answer

Number of lone pairs on the central atom in
SCl₂, O₃, ClF₃, SF₆ are:
2, 1, 2, 0 respectively.

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