You are currently viewing The p-Block Elements NEET Questions : NEET Previous year questions

The p-Block Elements NEET Questions : NEET Previous year questions

1. The correct order of atomic radii in group 13 elements is        (NEET 2018)

(a) B < Al < In < Ga < Tl

(b) B < Al < Ga < In < Tl

(c) B < Ga < Al < Tl < In

(d) B < Ga < Al < In < Tl

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2. AlF3 is soluble in HF only in presence of KF. It is due to the formation of     (NEET-II 2016)

(a) K3[AlF3H3]                   (b) K3[AlF6]

(c) AlH3                             (d) K[AlF3H]

3. The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence                                                                                          (2015, 2009)

(a) Al < Ga < In < Tl            (b) Tl < In < Ga < Al

(c) In < Tl < Ga < Al            (d) Ga < In < Al < Tl

NEET previous Year questions

5. Which one of the following elements is unable to form MF3–6 ion?       (NEET 2018)

(a) Ga                 (b) Al

(c) B                   (d) In

6. The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence                                                                                                (2010)

(a) BCl3 > BF3 > BBr3

(b) BBr3 > BCl3 > BF3

(c) BBr3 > BF3 > BCl3

(d) BF3 > BCl3 > BBr3

8. Boric acid is an acid because its molecule                                (NEET-II 2016)

(a) Contains replaceable H+ ion

(b) Gives up a proton

(c) Accepts OH from water releasing proton

(d) Combines with proton from water, molecule

9. Which of the following structure is similar to graphite?           (NEET 2013)

(a) B4C             (b) B2H6

(c) BN               (d) B

13. Which of the following species is not stable?                         (NEET 2019)

(a) [SiCl6]2–             (b) [SiF6]2–

(c) [GeCl6]2–            (d) [Sn(OH)6]2–

14. It is because of inability of ns2 electrons of the valence shell to participate in bonding that                                                                               (NEET 2017)

(a) Sn2+ is oxidizing while Pb4+ is reducing

(b) Sn2+ and Pb2+ are both oxidizing and reducing

(c) Sn4+ is reducing while Pb4+ is oxidizing

(d) Sn2+ is reducing while Pb4+ is oxidizing

15. Which of the following oxidation states are the most characteristic for lead and tin respectively?                                                                                 (2007)

(a) +2, +4                 (b) +4, +4

(c) +2, +2                 (d) +4, +2

22 Identify the correct statements from the following :                (NEET 2020)

(A) CO2(g) is used as refrigerant for ice-cream and frozen food.

(B) The structure of C60 contains twelve six carbon rings and twenty five carbon rings.

(C) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.

(D) CO is colorless and odorless gas.

(a) (A), (B) and (C) only

(b) (A) and  (C) only

(c) (B) and  (C) only

(d) (C) and  (D) only

23. Which of the following compounds is used in cosmetic surgery?  (NEET 2019)

(a) Silica                     (b) Silicates

(c) Silicones              (d) Zeolites

24. Which of these is not a monomer for a high molecular mass silicone polymer?  (NEET 2013)

(a) Me3SiCl                 (b) PhSiCl3

(c) MeSiCl3                 (d) Me2SiCl2

25. The basic structural unit of silicates is                                    (NEET 2013)

(a) SiO32–                                   (b) SiO4 2–

(c) SiO                                    (d) SiO44–

26. Which statement is wrong?                                                    (NEET 2013)

(a) Beryl is an example of cyclic silicate.

(b) Mg2SiO4 is orthosilicate.

(c) Basic structural unit in silicates is the SiO4 tetrahedron.

(d) Feldspars are not alum inosilicates.

27. Name the two types of the structure of silicate in which one oxygen atom of [SiO4]4– is shared?                                                                              (2011)

(a) Linear chain silicate               (b) Sheet silicate

(c) Pyro silicate                            (d) Three dimensional

28. The straight chain polymer is formed by                               (2009)

(a) Hydrolysis of CH3SiCl3 followed by condensation polymerization

(b) Hydrolysis of (CH3)4Si by addition polymerization

(c) Hydrolysis of (CH3)2SiCl2 followed by Condensation polymerization

(d) Hydrolysis of (CH3)3SiCl followed by Condensation polymerization.

29. Which of the following anions is present in the chain structure of silicates?     (2007)

(a) (Si2 O2–) n                    (b) (SiO2–3n )

(c) SiO4–4                           (d) Si2 7O6–

Answer Key

1. (d)        2. (b)        3. (a)         5. (c)         6. (b)        8. (c)          9. (c)       13. (a)      14. (d)      15. (a)       22. (d)      23. (c)          24. (a)        25. (d)       26. (d)      27. (c)       28. (c)       29. (b)

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