Answers
MCQs Assignment No – 2
Classification of Elements and Periodicity in Properties

Ans 1. b) O- + e‑ → O2-. As electron is being added to anion, whereas in all rest of three, electron is being added to a neutral atom which will not have as much repulsion as in case of O-.

Ans 2. c) 1s2 2s2 2p5
1s2 2s2 2p6 3s2 3p6 has completely filled subshell so will not attract e-

Ans 3. (c) CI > F > Br > I

Ans 4.  (d) none


Ans 5. (b) O

Ans 6. (c) Halogens

Ans 7. (c) F > O > N > P

Ans 8. (a) B < Al < Mg < K

Ans 9. (b) B < C < N < O (increasing first ionization enthalpy)

Ans 10. (a) Al2O3 < MgO < Na2O < K2O

Ans 11. (c) N, O, F

Ans 12. (a) s block


Ans 13. (c) [Ne] 3s2 3p5

Ans 14. (d) similar electronegativity



To Check Question Click the Link Below:

https://vikasjasrotiablog.blogspot.com/2020/06/mcqs-assignment-no-2-classification-of.html