You are currently viewing Previous Year Chemistry NEET Questions Classification of Elements and Periodicity in Properties

Previous Year Chemistry NEET Questions Classification of Elements and Periodicity in Properties

1. Identify the incorrect match. Name IUPAC Official Name      (NEET 2020)

(A) Unnilunium    (i) Mendelevium

(B) Unniltrium     (ii) Lawrencium

(C) Unnilhexium (iii) Seaborgium

(D) Unununnium (iv) Darmstadtium

(a) (A), (i)           (b) (B), (ii)

(c) (C), (iii)         (d) (D), (iv)

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2. The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?                 (NEET 2017)

(a) Carbon family, [Rn] 5f 14 6d10 7s2 7p2

(b) Oxygen family, [Rn] 5f 14 6d10 7s27p4

(c) Nitrogen family, [Rn] 5f14 6d10 7s2 7p6

(d) Halogen family, [Rn] 5f 14 6d10 7s2 7p5

7. For the second period elements the correct increasing order of first ionization enthalpy is                                                                                       (NEET 2019)

(a) Li < Be < B < C < O < N < F < Ne

(b) Li < Be < B < C < N < O < F < Ne

(c) Li < B < Be < C < O < N < F < Ne

(d) Li < B < Be < C < N < O < F < Ne

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8. Match the oxide given in column I with its property given in column II.

Column I          Column II

(i) Na2O            A. Neutral

(ii) Al2O3          B. Basic

(i ii)N2O            C. Acidic

(iv)Cl2O7         D. Amphoteric

Which of the following options has all correct pairs?                  (NEET 2019)

(a) (I)-B, (ii)-A, (iii)-D, (IV)-C

(b) (I)-C, (ii)-B, (iii)-A, (IV)-D

(c) (I)-A, (ii)-D, (iii)-B, (IV)-C

(d) (I)-B, (ii)-D, (iii)-A, (IV)-C

9. Which of the following oxides is most acidic in nature?          (NEET 2018)

(a) MgO        (b) BeO

(c) BaO         (d) CaO

10. In which of the following options the order of arrangement does not agree with the variation of property indicated against it?                                 (NEET 2016)

(a) I < Br < Cl < F (increasing electron gain enthalpy)

(b) Li < Na < K < Rb (increasing metallic radius)

(c) Al3+ < Mg2+ < Na+ < F(increasing ionic size)

(d) B < C < N < O (increasing first ionization enthalpy)    (a,d)

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11.

        (2015)

(a) O ion has comparatively smaller size than oxygen atom

(b) Oxygen is more electronegative

(c) Addition of electron in oxygen results in larger size of the ion

(d) Electron repulsion outweighs the stability gained by achieving noble gas
configuration.

12. Which of the following orders of ionic radii is correctly represented? (2014)

(a) H> H+ > H            (b) Na+ > F> O2–

(c) F > O2 > Na+      (d) All are wrong

13. Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? (2013)

(a) Al < Ca < O < C < F

(b) Al < O < C < Ca < F

(c) C < F < O < Al < Ca

(d) Ca < Al < C < O < F

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14. In which of the following arrangements the given sequence is not strictly according to the property indicated against it?                            (2012)

(a) HF < HCl < HBr < HI : increasing acidic strength

(b) H2O < H2S < H2Se < H2Te : increasing pKa values

(c) NH3 < PH3 < AsH3 < SbH3 : increasing acidic character

(d) CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power