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COMEDK2024Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

With reference to Pauling's Electronegativity scale, which one of the following options shows the correct order of electronegativity values of elements?

Options

  1. AN > S > P
  2. BNa > Cs > K
  3. CMg > Al > Si
  4. DB > C > Al

Correct answer

A. N > S > P

Step-by-step solution

The Pauling electronegativity values for the elements are as follows: Nitrogen (N) = 3.04, Sulfur (S) = 2.58, Phosphorus (P) = 2.19. Thus, N > S > P is correct. Sodium (Na) = 0.93, Cesium (Cs) = 0.79, Potassium (K) = 0.82. The order Na > K > Cs is correct, so Na > Cs > K is incorrect. Magnesium (Mg) = 1.31, Aluminum (Al) = 1.61, Silicon (Si) = 1.90. The order Mg Al > Si is incorrect. Boron (B) = 2.04, Carbon (C) = 2.55, Aluminum (Al) = 1.61. The order C > B > Al is correct, so B > C > Al is incorrect. Answer: N > S

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