MCQs For NCERT Class 11 Chemistry Chapter 11 The P-Block Elements

Please refer to the MCQ Questions for Class 11 Chemistry Chapter 11 The P-Block Elements with Answers. The following The P-Block Elements Class 11 Chemistry MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 11. Our experts have designed MCQ Questions for Class 11 Chemistry with Answers for all chapters in your NCERT Class 11 Chemistry book.

The P-Block Elements Class 11 MCQ Questions with Answers

See below The P-Block Elements Class 11 Chemistry MCQ Questions, solve the questions and compare your answers with the solutions provided below. 

Question. NH₃ and BF₃ form an adduct readily because they form
(a) a coordinate bond
(b) a hydrogen bond
(c) an ionic bond
(d) a covalent bond

Question. When Al is added to KOH solution
(a) no action takes place
(b) oxygen is evolved
(c) water is produced
(d) hydrogen is evolved

Question. The factor responsible for weak acidic nature of B–F bonds in BF₃ is
(a) large electronegativity of fluorine
(b) three centred two electron bonds in BF₃
(c) pπ – dπ back bonding
(d) pπ – pπ back bonding

Question. Which of the following does not react with aqueous NaOH ?
(a) B
(b) Al
(c) Ga
(d) Tl

Question. Amphoteric oxide among the following is
(a) B₂O₃
(b) Ga₂O₃
(c) In₂O₃
(d) Tl₂O₃

Question. In borax bead test which compound is formed?
(a) Ortho-borate
(b) Meta-borate
(c) Double oxide
(d) Tetra-borate

Question. Orthoboric acid
(a) donate proton to form H₂BO₃^–
(b) accept proton of form H₄BO₃ ⁺
(c) donate OH^– to form H₂BO₂ ⁺
(d) accept OH^– to form [B(OH)₄]^–

Question. H₃BO₃ on heating up to 373 K yields:
(a) boric anhydride
(b) orthoboric acid
(c) metaboric acid
(d) tetraboric acid

Question. Boric acid is polymeric due to
(a) its acidic nature
(b) the presence of hydrogen bonds
(c) its monobasic nature
(d) its geometry

Question. B(OH)₃ is
(a) monobasic acid
(b) dibasic acid
(c) tribasic acid
(d) triacidic base

Question. The formula of mineral borax is
(a) Na₂B₄O₇
(b) Na₂B₄O7.4H₂O
(c) Na₂B₄O₇.5H₂O
(d) Na₂B4O₇ .10H₂O

Question. Which of the following hydroxide is acidic ?
(a) Al(OH)₃
(b) Ca(OH)₃
(c) Tl(OH)₃
(d) B(OH)₃

Question. Orthoboric acid when heated to red hot gives
(a) metaboric acid
(b) pyroboric acid
(c) boron and water
(d) boric anhydride

Question. In reaction BF₃ + 3LiBH₄ →3LiF + X ; X is
(a) B₄H₁₀
(b) B₂H₆
(c) BH₃
(d) B₃H₈

Question. Inorganic benzene is
(a) B₃H₃N₃
(b) BH₃NH₃
(c) B₃H₆N₃
(d) H₃B₃N₆

Question. The structure of diborane ( B₂H₆ ) contains
(a) four 2c-2e bonds and four 3c-2e bonds
(b) two 2c-2e bonds and two 3c-3e bonds
(c) two 2c-2e bonds and four 3c-2e bonds
(d) four 2c-2e bonds and two 3c-2e bonds

Question. In diborane
(a) 4–bridged hydrogens and two terminal hydrogens are present
(b) 2– bridged hydrogens and four terminal hydrogens are present
(c) 3–bridged and three terminal hydrogens are present
(d) None of these

Question. Which is false in case of boric acid H₃BO₃?
(a) It acts as a tribasic acid.
(b) It has a planar structure.
(c) It acts as a monobasic acid.
(d) It is soluble in hot water.

Question. BCl₃ does not exist as dimer but BH₃ exists as dimer (B₂H₆) because
(a) chlorine is more electronegative than hydrogen
(b) there is pπ-pπ back bonding in BCl₃ but BH₃ does not contain such multiple bonding
(c) large sized chlorine atoms do not fit in between the small boron atoms where as small sized hydrogen atoms get fitted in between boron atoms
(d) None of the above

Question. Diborane upon hydrolysis gives
(a) boric anhydride
(b) metaboric acid
(c) orthoboric acid
(d) boron oxide

Question. Borazole is known as
(a) organic benzene
(b) organic xylene
(c) inorganic benzene
(d) inorganic xylene

Question. The two type of bonds present in B₂H₆ are covalent and
(a) ionic
(b) co-ordinate
(c) hydrogen bridge bond
(d) None of these

Question. Reaction of diborane with ammonia gives initially
(a) B₂H₆.NH₃
(b) Borazole
(c) B₂H₆.3NH₃
(d) [BH₂(NH3)₂]⁺[BH₄]^–

Question. The electronic configuration of four different elements is given below. Identify the group 14 element among these
(a) [He] 2s¹
(b) [Ne] 3s²
(c) [Ne] 3s²3p²
(d) [Ne] 3s²3p⁵

Question. Which of the following is most electronegative?
(a) Pb
(b) Si
(c) C
(d) Sn

Question. Which of the following isotope of carbon is radioactive?
(a) ¹²C
(b) ¹³C
(c) ¹⁴C
(d) All of these

Question. The compounds of boron and hydrogen are collectively called
(a) diboranes
(b) borazoles
(c) boracits
(d) boranes

Question. The bonds present in borazole or inorganic benzene are
(a) 9 σ, 6π
(b) 12 σ, 3π
(c) 6 σ, 9π
(d) 15 σ only

Question. Carbon and silicon belong to group 14. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to
(a) large size of silicon
(b) more electropositive nature of silicon
(c) availability of d-orbitals in silicon
(d) Both (a) and (b)

Question. The inert pair effect is most prominent in
(a) C
(b) Pb
(c) Ge
(d) Si

Question. Mark the oxide which is amphoteric in character
(a) CO₂
(b) SiO₂
(c) SnO₂
(d) CaO

Question. Red lead is
(a) Pb₃O₄
(b) Pb₂O₃
(c) Pb₂O
(d) PbO

Question. The oxide of lead used in lead accumulators is
(a) PbO
(b) Pb₂O₃
(c) Pb₃O₄
(d) PbO₂

Question. Which of the following is/are not correctly matched ?
(i) GeO₂^– Acidic (ii) PbO₂^– Amphoteric
(iii) CO ^– Neutral (iv) SiO₂ ^– Amphoteric
(a) (i) and (iv)
(b) (iv) only
(c) (ii) only
(d) (iii) only

Question. The most stable +2 oxidation state is exhibited by
(a) Fe
(b) Sn
(c) Pb
(d) Si

Question. Which of the following lead oxides is present in ‘Sindhur’?
(a) PbO
(b) PbO₂
(c) Pb₂O₃
(d) Pb₃O₄

Question. Least thermally stable is
(a) CCl₄
(b) SiCl₄
(c) GeCl₄
(d) GeBr₄

Question. Unlike the other elements of its group carbon and silicon does not form MX₂ type molecules because
(a) energetically this is not possible
(b) carbon undergoes catenation
(c) it is non-metallic
(d) carbon does not contain d-orbital

Question. Which of the following halides is the most stable?
(a) CF₄
(b) CI₄
(c) CBr₄
(d) CCl₄

Question. The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence
(a) PbX₂ << SnX₂ << GeX₂<< SiX₂
(b) GeX₂ << SiX₂ << SnX₂ << PbX₂
(c) SiX₂ << GeX₂ << PbX₂ << SnX₂
(d) SiX₂ << GeX₂ << SnX₂ << PbX₂.

Question. Which halide is least stable and has doubtful existence
(a) CI₄
(b) GeI₄
(c) SnI₄
(d) PbI₄

Question. PbF₄, PbCl₄ exist but PbBr4 and PbI4 do not exist because of
(a) large size of Br^– and I^–
(b) strong oxidising character of Pb⁴⁺
(c) strong reducing character of Pb⁴⁺
(d) low electronegativity of Br– and I^–.

Question. Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order :
(a) C > Si > Ge > Sn
(b) C >> Si > Ge ≈Sn
(c) Si > C > Sn > Ge
(d) Ge > Sn > Si > C

Question. The catenation tendency of C,Si and Ge is in the order Ge < Si < C.The bond energies (in kJ mol⁻¹ ) of C-C,Si-Si and Ge-Ge bonds, respectively are
(a) 167, 180, 348
(b) 180, 167, 348
(c) 348, 167, 180
(d) 348, 180, 167

Question. Lead pipes are readily corroded by
(a) H₂SO₄
(b) HCl
(c) CH₃COOH
(d) pure water

Question. Which of the following is not correct?
(a) Ge(OH)₂ is amphoteric
(b) GeCl₂ is more stable than GeCl₄
(c) GeO₂ is weakly acidic
(d) GeCl₄ in HCl forms [ GeCl₂]^2– ion

Question. The main reason that SiCl₄ is easily hydrolysed as compared to CCl₄ is that
(a) Si-Si bond is weaker
(b) SiCl₄ can form hydrogen bonds
(c) SiCl₄ is covalent
(d) Si can extend its coordination number beyond four

Question. Lead pipes are not suitable for drinking water because
(a) lead forms basic lead carbonate
(b) lead reacts with water containing air to form Pb(OH)₂
(c) a layer of lead dioxide is deposited over pipes
(d) lead reacts with air to form litharge

Question. The reducing power of divalent species decreases in the order
(a) Ge > Sn > Pb
(b) Sn > Ge > Pb
(c) Pb > Sn > Ge
(d) None of these

Question. The element that does not show catenation among the following p-block elements is
(a) carbon
(b) silicon
(c) germanium
(d) lead