pls explain the marked questions
pls explain the marked questions 81. Which of the following order is incorrect ? 2 a) Electronegativity of æntral atom : GF4 > SiH4 Hydration energy : Mg & S Na+ (c) ectrical conductance : > > S Magnetic moment : Ni4+ > 84— Which Of the following pair of elements belong to the same period? b (a) Mg and Sb and Zn (c) Na and Ca ca and Cl ch of the following atomic species has maximum ionisation energy : 84. The correct order of I. E.z. is: Of the following compound is most acidic? (b) P4010 (c) SOS (d ) B 203 er the following electronic configuration of an element(P) : 8 Then correct Statement about element ' P is : It belongs to 6th period and 1st group It belongs to 6th period and 2nd group (c) belongs to 6th period and 3rd group (d) None of these ch of the following metal is highest electropositive (metallic) in nature ? Rb (a) Be correct order of atomic/ionic radii is : (b) Ni > cu > Zn (d) Of these number of electrons in 'd ' orbital ? 89. Which Of the following species must have m (b) Fe3+ (c) cu 9 expression of "Allred and RochoWs e is: (a) Electronegativity = 07444 + 0359 -4 2 + 0744 (b) EleCtronegatMty = 0359 z eff. Z _EL + 0744 (c) El&tronegativity = 0359 + 0744 negativity = 0359 2 • (d) Both (a) and (b) 9 Which of the following transformation least en (b is required?

Dear Student

Question No. 86-
[Xe] 4f¹⁴ 5d¹ 6s² is the electronic configuration of Lutetium, Lu belonging to Period 6 and Group IIIB.
Therefore, option (c) is the right option.

Question No. 90 -
According to Allred-Rochow Electronegativity -

χ^{A R}

(\frac{3590 x Z_{e f f}}{{r^{2}}_{c o v}}) + 0.744

Where, Z_eff is the effective nuclear charge, r_cov is the covalent radius
Therefore, option (d) is correct.

For other queries, kindly post in separate threads.

Regards

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