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Integer Answer Type Questions for JEE: Classification of elements & periodicity in properties | Chapter-wise Tests for JEE Main & Advanced PDF Download

Q.1. Calculate the dipole moment of HBr molecule if the bond length is 1.2476.

Ans. 5.99
μ = q.r. = (1.6023 x 10–19-C) (1.2476 x 1010 m)
= 1.99 x 10–29 cm
Integer Answer Type Questions for JEE: Classification of elements & periodicity in properties | Chapter-wise Tests for JEE Main & Advanced= 5.99 D


Q.2. HBr molecule has internuclear distance of 1.27 x 10–10 m. The electronic charge is 4.8 x 10–10esu. Observed dipole moment is 1.03 D. find % ionic character of the bond.

Ans. 16.80
% ionic character = Integer Answer Type Questions for JEE: Classification of elements & periodicity in properties | Chapter-wise Tests for JEE Main & Advanced
Integer Answer Type Questions for JEE: Classification of elements & periodicity in properties | Chapter-wise Tests for JEE Main & Advanced= 16.80


Q.3. The electronegativity of H, N are 2.1, 3.0 respectively. Calculate percentage ionic character of H – N bond.

Ans. 17.24
% Ionic character = 16 (xA – xB) + 3.5 (xA – xB)2
xA = 3.0, xB = 2.1
∴ % IC = 16 x 0.9 + 3.5 x 0.81

= 17.24


Q.4. Calculate effective nuclear charge on a valence electron in a nitrogen atom
N = 1s2 2s2 2p3.

Ans. 3.9
= 4 x 0.35 + 2 x 0.85
= 3.1

= Z* = Z -σ = 7 – 3.1 = 3.9


Q.5. Calculate AlredRochow electro negativity in F using Slater rule, rF = 0.7065 Å.

Ans. 4.23
Integer Answer Type Questions for JEE: Classification of elements & periodicity in properties | Chapter-wise Tests for JEE Main & Advanced 
= 4.23

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