Q6 · CSIR NET Chemistry, December 2019
Paper: CSIR NET December 2019 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Chemical Bonding – General · Marks: 2 · Difficulty: Medium
Consider the following statements for Allred-Rochow electronegativity ($\chi$AR): (i) $\chi$AR is directly proportional to $Z_{\mathrm{eff}}$ (ii) $\chi$AR is inversely proportional to $Z_{\mathrm{eff}}$ (iii) $\chi$AR is inversely proportional to r(covalent). (iv) $\chi$AR is inversely proportional to $r^2$(covalent). The correct statements are
(a)(i) and (iv)
(b)(ii) and (iv)
(c)(i) and (iii)
(d)(ii) and (iii)
Answer
Answer (as printed): A
Explanation
Allred-Rochow electronegativity (χAR): χAR = (3590 z*/r2)+ 0.744 where, r = covalent radius (in pm), z* =effective nuclear charge
Explanation as extracted from the printed page; notation may be imperfect.
Study loop for Chemical Bonding