17 public questions tagged with this topic.
Dipole moment depends on electronegativity difference and bond length. CH₃F has the highest dipole moment due to fluorine's high electronegativity.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
In CH₃C≡N, the carbon triple-bonded to nitrogen is sp hybridized (50% s-character), making it the most electronegative.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Classification and Nomenclature of Organic Compounds - IUPAC
In HF , the H-F electronegativity difference (1.9) is greater than H-O (1.4) or H-N (0.9), leading to the strongest hydrogen bonding.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Hydrogen Bonding and Resonance and Dipole Moment
Electronegativity decreases down group 15. N (period 2, 3.0) has the highest value among N, P, As, and Sb.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Nomenclature of Elements with Atomic Number >100
Electronegativity increases across a period and decreases down a group. Among Li, Be, N, and F, F (group 17, period 2) has the highest electronegativity due to its position on the far right of the periodic table.
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
Electronegativity decreases down group 15 due to increasing size. Bi (period 6) has the lowest value among N, P, As, and Bi.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
In period 5 d-block (Y to Cd), electronegativity increases across. Pd (group 10) has the highest electronegativity due to its position and nuclear charge.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
Electronegativity increases across a period. In period 4 (K to Kr), Br (group 17) has the highest electronegativity among K, Ca, and Br.
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
In period 2, the largest electronegativity difference is between Li (1.0) and F (4.0), a gap of 3.0, compared to other pairs like Be-B or C-N.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
Electronegativity decreases down a group due to increasing size. For group 16: O > S > Se.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
Electronegativity decreases down a group and increases across a period. Among F, Cl, K, and Cs, Cs (group 1, period 6) has the lowest value.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
In period 5 p-block (Rb to Xe), electronegativity increases across. I (group 17) has the highest electronegativity among Sn, Sb, and I, excluding noble gases.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency
