Chapter (The P-Block Elements)

Chapter 11
The p-Block Elements
SECTION - A
Straight Objective Type
This section contains multiple choice questions. Each question has 4 choices (A), (B), (C) and (D) for its answer,
out of which ONLY ONE is correct.
1. Boron cannot form which one of the following anions?
3
(A) BF 6 (B) BH4 (C) B(OH)4 (D) BO2
2. Carbon cannot be used in the reduction of Al2O3 because :
(A) It is expensive
(B) The enthalpy of formation of CO2 is more than that of AI2O3
(C) Pure carbon is not easily available
(D) The enthalpy of formation of AI2CO3 is too high
3. Bauxite ore is made up of AI2O3 + SiO2 + TiO2 + Fe2O3. This ore is treated with concentrated NaOH solution
at 500 K and 35 bar pressure for few hours and filtered off. In the filtrate the species present is :
(A) NaAI(OH)4 only (B) Na2Ti(OH)6 only
(C) NaAI(OH)4 and Na2SiO3 both (D) Na2SiO3 only
4. Which is a correct statement about diborane structure?
(A) All HBH bond angles are equal (B) All H – B bond lengths are equal
(C) It has two three-centre-2 electron bonds (D) All hydrogen and boron atoms are in one plane
5. Which one of the following is the correct statement?
(A) Boric acid is a protonic acid
(B) Beryllium exhibits coordination number of six
(C) Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase
(D) B2H6.2NH3 is known as inorganic benzene
(101)
The p-Block Elements JEE (Advanced) Q-Bank-2018
6. Observe the following statements regarding purification of bauxite :
I. During Hall’s process, silica is removed as Si (vapour).
II. Bauxite ore contaminated with Fe2O3 is purified by Baeyer’s process.
III. During serpeck’s process. AIN is formed.
The correct choice is :
(A) I. II and III (B) Only I and III (C) Only I and II (D) Only II and III
7. In diborane the two H – B – H angles are nearly :
(A) 60°, 120° (B) 95°, 120° (C) 95°, 150° (D) 120°, 180°
8. What product is formed on heating lead nitrate?
(A) PbO + NO + O2 (B) PbO + NO2 + O2 (C) Pb + NO2 (D) PbO + N2
100C Carbon
9. Identify B in the following reaction, H4SiO4 
H O
 A 

 B  CO :
2
(A) Corundum (B) Quartz (C) Silica (D) Carborundum
10. The incorrect statement/s among the following is/are :
I. NCI5 does not exist while PCI5 does
II. Lead prefers to form tetravalent compounds
III. The three C – O bonds are not equal in the carbonate ion
IV. Both O2 and NO are paramagnetic
(A) I, III and IV (B) I and IV (C) II and III (D) I and III
11. The stability of dihalides of Si, Ge Sn and Pb increases steadily in the sequence :
(A) GeX2 < SiX2 < SnX2 < PbX2 (B) SiX2 < GeX2 < PbX2 < SnX2
(C) SiX2 < GeX2 < SnX2 < PbX2 (D) SiX2 < SnX2 < GeX2 < PbX2
12. Which one of the following statement about the zeolitie is false?
(A) They are used as cation exchangers
(B) They have open structure which enables them to take up small molecules
(C) Zeolites are aluminosilicates having three dimensional network
(D) Some of the SiO44  units are replaced by AlO54 and concentrated ions in zeolites
13. Addition of SnCl2 to HgCl2 gives precipitate :
(A) White turning to red (B) White turning to grey
(C) Black turning to white (D) None of the above
(102)
JEE (Advanced) Q-Bank-2018 The p-Block Elements
14. In silicon dioxide
(A) There are double bonds between silicon and oxygen atoms
(B) Silicon atom is bonded to two oxygen atoms
(C) Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bounded to two silicon
atoms
(D) Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bounded to two silicon
atoms
15. The tendency for catenation in group 14 elements varies in the order
(A) C >> Si > Ge = Sn > Pb (B) C << Si < Ge = Sn < Pb
(C) C >> Si < Ge < Sn < Pb (D) C >> Si = Ge = Sn > Pb
16. When tin is treated with concentrated nitric acid :
(A) It is converted into stannous nitrate (B) It is converted into stannic nitrate
(C) It is converted into metastannic acid (D) It becomes passive
SECTION - B
Multiple Correct Answer Type
This section contains multiple choice questions. Each question has 4 choices (A), (B), (C) and (D) for its answer,
out of which ONE OR MORE is/are correct.
17. CO2 is iso-structural with
(A) SnCl2 (B) HgCl2 (C) C2H2 (D) NO2
18. The true facts about CO are
(A) reduces I2O5 to I2 (B) reduces Fehling’s solution to Cu2O
(C) it’s combustion is an endothermic process (D) carbon is in the highest possible oxidation state
19. Which of the following metal(s) can form acetylides ?
(A) Ag (B) Cu (C) Ca (D) Be
20. Tick the correct statement(s)
(A) Electron affinity of lead is lower than that of tin.
(B) Lead dioxide is an oxidising agent
(C) Lead has higher ionisation potential than tin
(D) Lead is a metalloid
21. Which is (are) not probable units of silicates ?
(A) (Si2O5)2– (B) (SiO3)2– (C) (Si2O10)6– (D) (Si2O8)6–
22. When heated with concentrated H2SO4, K4Fe(CN)6 gives
(A) CO2 (B) K2SO4 (C) CO (D) HCN
(103)
23. Carbon monoxide is obtained when
(A) HCOOH is heated with conc. H2SO4 (B) Ca(COO)2 heated with H2SO4
(C) CO2 is heated in presence of coke (D) Fermentation of sugar
24. Pick the facts about CO2
(A) CO2 extinguishes active metal fires (B) It is the anhydride of H2CO3
(C) It is little soluble in water (D) A very good oxidising agent
25. In which of the following reaction(s) a carbonate is produced ?

(A) KHCO3   (B) Na2O + CO2 
(C) Ca(OH)2 + CO2 (excess)  (D) Al2(SO4)3 + NaHCO3 
26. Which is (are) correct ?
(A) Ge(OH)2 is amphoteric (B) PbCl4 is more stable than PbCl2
(C) Trisilylamine is pyramidal (D) GeCl4 in HCl forms H2[GeCl6]
27. What is (are) true about structure of [B4O5(OH)4]2– ?
(A) Two boron atoms carry negative charge (B) Two 3c, 2e bonds are there
(C) Two boron atoms are neutral (D) Two boron atoms are sp3 hybridised
28. Metallic aluminium can reduce
(A) Cr2O3 (B) Mn3O4
(C) Fe2O3 (D) MgO
29. Aluminium liberates hydrogen gas from
(A) Boiling H2O (B) NaOH
(C) H2SO4 (D) HCl
30. True fact(s) about lapis lazuli
(A) Its a brilliant blue colour stone (B) It is used in jewelry
(C) It is a silicate mineral containing rock (D) It’s major constituent is zinc silicate
31. Which of the following is (are) alum ?
(A) K2SO4.Na2SO4.24H2O (B) K2SO4.Fe2(SO4)3.24H2O
(C) (NH4)2SO4.Al2(SO4)3.24H2O (D) Na2SO4.ZnSO4.24H2O
32. Aluminium becomes passive in
(A) Conc.HNO3 (B) H2CrO4
(C) Conc.HCl (D) HClO4
33. The strength of boric acid is increased by
(A) Phenol (B) glycerol
(C) mannitol (D) ethyl alcohol
(104)
34. Pick the correct fact(s) about H3BO3
(A) It is mainly a monobasic acid
(B) It has a layer structure in which BO3 units are joined by hydrogen bonds
(C) It is obtained by treating borax with conc. H2SO4
(D) Boron atoms are negatively charged
35. Which of the following represent(s) crystalline form of Al2O3 ?
(A) Emerald (B) Ruby (C) Sapphire (D) Diamond
36. Alumina is used as
(A) Refractory material (B) Dehydrating agent
(C) Stationary phase in column chromotography (D) Constituent of baking powder
37. The major role of fluorspar (CaF2), which is added in small quantities in the electrolytic reduction of alumina
dissolved in fused cryolite (Na3AIF6) is
(A) as a catalyst
(B) to make the fused mixture very conducting
(C) to lower the melting point
(D) to decrease the rate of oxidation of carbon at the anode.
38. Nitrogen (I) oxide is produced by :
(A) thermal decomposition of ammonium nitrate (B) disproportionation of N2O4
(C) thermal decomposition of ammonium nitrite (D) interaction of hydroxylamine and nitrous acid.
39. Which of the following statement(s) is/are true?
(A) The lattice structure of diamond and graphite are different.
(B) Graphite is an impure form of carbon while diamond is a pure form.
(C) Graphite conducts electricity while diamond does not.
(D) Graphite has lower density than diamond.
40. Nitrogen can combine directly at higher temperatures to give nitrides with
(A) Mg (B) AI (C) Zn (D) Fe
41. Which is/are true statement(s)?
(A) All halogens form oxy acids.
(B) All halogens show –1, +1, +3, +5 and +7 oxidation states.
(C) HF is a dibasic acid and attack glass.
(D) Oxidizing power is in order F2 > CI2 > Br2 > I2.
42. The metal(s) soluble in aqua regia is (are)
(A) Pt (B) Au (C) Ag (D) Cu

(105)
43. NH3 can’t be obtained by
(A) heating NH4NO3 or NH4NO2 (B) heating of NH4CI or (NH4)2CO3
(C) heating of glycine (D) reaction of AIN or Mg3N2 or CaCN2 with H2O
44. Be and AI resembles in
(A) both become passive on reaction with HNO3 due to formation of oxide layer
(B) their chlorides are Lewis acids
(C) chlorides exist in polymeric form
(D) hydroxides are soluble in alkali as well as in acid
45. Which is incorrect representation of the dithionate ion structure?
4 2
O O O O
O
(A) S S (B) O S S O
O O
OO O O
4 2
O O S
O
S S O S O
(C) S S (D)
O O
O O
46. Ammonia on reaction with hypochlorite ion can form
(A) NO (B) NH2CI (C) N2H4 (D) HNO2
47. Boron readily dissolves in
(A) conc. HCl (B) fused NaOH at 673 K
(C) fused Na2CO3 + H2CO3 at 1173 K (D) a mixture of conc. HNO3 and conc. H2SO4 (1:2)
48. When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ion (s)
is/are exchanged with
(A) H+ ions (B) Ca2+ ions (C) SO42– ions (D) Mg2+ ions
49. A commonly used talcum powder contains 20% NaAI(SO4)2, 30% NaHCO3, 10% Ca(H2PO4)2 and 40% of
starch. Which of the following statements are correct?
(A) Ca(H2PO4)2 is acidic and when moistened it reacts with NaHCO3, evolving CO2 gas.
(B) NaAI(SO4)2 slows down the decomposition reaction of NaHCO3, so that CO2 is evolved more slowly.
(C) NaAI(SO4)2 is acidic and when moistened it reacts with NaHCO3, evolving CO2 gas.
(D) Both (A) and (B)
(106)
SECTION - C
Linked Comprehension Type
This section contains paragraphs. Based upon this paragraph, multiple choice questions have to be answered. Each
question has 4 choices (A), (B), (C) and (D) for its answer, out of which ONE/MORE is/are correct.
Paragraph for Question Nos. 50 to 52
700C
(i) Boron  O2   (X) (ii) (X)  C(carbon)  Cl2  (Y)  CO
(iii) (Y)  LiAIH4  (Z)  LiCI  AICI3 (iv) (Z) + Excess NH3 
high Temperature
 (B)
50. Compound (Z) is :
(A) an ionic compound (B) an electron deficient compound
(C) A compound with 3C – 3e– bond (D) having ethane like structure
51. Compound (X) and (Y) are :
(A) (X) = BO2, (Y) = BCI2 (B) (X) = BO3, (Y) = BCI4
(C) (X) = B2O3, (Y) = BCI3 (D) (X) = BO3 (Y) = B4C
52. Compound (B) is :
(A) borazole (B) inorganic benzene (C) BCl3 (D) boron nitride
Metal nitrate (A) on heating decomposes, leaving a solid residue (B) which goes into solution with dilute HCl.
The solution of (B) gives a white precipitate with ammonium carbonate solution. The precipitate (C) is dissolved
in dilute HCI and the solution is treated with potassium chromate to get yellow precipitate (D). The solution
(B) with dilute H2SO4 also gives a white precipitate (E) insoluble in dilute HCI and nitric acid. The precipitate
(E) is a part of a white pigment lithopone.
53. The compound (E) is :
(A) BaSO4 (B) MgSO4 (C) CaSO4 (D) Na2SO4
54. The yellow precipitate (D) is :
(A) PbCrO4 (B) BaCrO4 (C) CaCrO4 (D) none of these
55. The metal nitrate (A) is :
(A) Ca(NO3)2 (B) Pb(NO3)2 (C) Ba(NO3)2 (D) KNO3
Silicon is the second most abundant element occurring in earth crust. It is always found in combined state.
It is obtained by reduction of silica and exists in two allotropic forms, i.e. amorhpous and crystalline.
Amorphous form is obtained by heating dry powdered silica with magnesium. Crystalline form is obtained by
heating sand or quartz in a furnace. Silicon is used in manufacturing of certain alloys and polymers such
as ferrosilicon, silicon bronze etc.
The compounds of silicon are carborundum, silicone, silicates, glass etc.
Silicones are organosilicon polymer and silicates are metal derivatives of silicic acid, while carborundum are
obtained by heating mixture of sand, carbon and common salt.
(107)
56. Which type of linkage is present in silicones?
(A) NH (B) Si (C) Si–O–Si (D) R Si
O O O
57. The structural unit of silicates is
(A) SiO2 (B) SiO44  (C) SiO23 (D) SiO22
58. The general formulae for a glass obtained from silica is
(where R = Na or K and M = Ca, Ba, Zn or Pb)
(A) RO.MO.4SiO2 (B) R2O.M.4SiO2 (C) R2O.MO.6SiO2 (D) R2O.M2O.3SiO2
59. (SiH3)3N is a weaker base than (CH3)3N because
(A) in (SiH3)3N, lone pair of electrons on nitrogen is involved in d - pback bonding
(B) in (CH3)3, N , steric effect of three alkyl groups make it more basic
. .
(C) absence of d – p back bonding in (CH3)3 N
(D) all of the above
60. When two structural units of silicates join along a corner containing oxygen atom is called
(A) orthosilicate (B) cyclic silicate (C) pyrosilicate (D) sheet silicate
SECTION-D
Matrix-Match Type
This Section D have “match the following” type question. Question contains two columns, Col-I and Col-II. Match the
entries in Col-I with the entries in Col-II. One or more entries in Col-I may match with one or more entries in Col-II.
61. Match the carbides given in column I with the properties given in column - II
Column I Column II
(A) Be2C (p) abrasive
(B) Al4C3 (q) salt like carbide
(C) SiC (r) covalent carbide
(D) Mg2C3 (s) gives propyne when reacts with water
62. Match the oxides given in column - I with their properties given in column - II
Column I Column II
(A) PbO2 (p) amphoteric
(B) CO2 (q) reacts with NaOH
(C) SiO2 (r) acidic only
(D) SnO2 (s) oxidising agent
(108)
63. Match the species given in Column-I with the facts given in Column - II.
Column I Column II
(A) B (p) Exists as dimer or polymer
(B) Al (q) Graphite like structure
(C) BN (r) Fused KOH dissolves it
(D) BH3 (s) Conducts electricity in pure form
64. Match the species given in column-I with the facts given in Column - II
Column I Column II
(A) AlCl3 (p) Exists as dimer
(B) Al2(SO4)3 (q) Hydrolyses in water
(C) BCl3 (r) Aqueous solution acts as buffer
(D) Na2B4O7 (s) Part of alum
SECTION-E
Integer Answer Type
This section contains Integer type questions. The answer to each of the questions is a single digit integer, ranging
from 0 to 9. The appropriate bubbles below the respective question numbers in the ORS have to be darkened. For
example, if the correct answers to question numbers X, Y and Z(say) are 6, 0 and 9, respectively, then the correct
darkening of bubbles will look like the following :
X Y Z
0 0 0
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 7
8 8 8
9 9 9
65. How many of the following solvents can dissolve graphite ?
benzene, CS2, ethanol, water, acetic acid, CHCl3
66. Say hypothetically you have two pyroxene chains represented by (SiO3 )n2n . Total number of negative charge is
2n + u, where u is
(109)
67. Number of HCl molecules needed to react completely the aqueous solution developed by reacting 1 molecule
of borax in water is
68. In case of a boron molecule (B12), number of faces plus number of corners minus number of edges is
69. Boron does not react with how many of the following chemical ?
Hot water, Concentrated HCl, Aqueous NaOH, Concentrated HNO 3, Concentrated H2SO4, molten KOH, dilute
HNO3.
70. In one unit of NaBO2, number of oxygen atoms is
SECTION - F
Reasoning Type
This section contains reasoning type questions. Each question has 4 choices (A), (B), (C) and (D), out of which
ONLY ONE is correct.
71. STATEMENT-1: No mountains are found to made up of Na2CO3 or K2CO3.
and
STATEMENT-2: Na2CO3 and K2CO3 are not found in nature.
(A) STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1
(B) STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for
STATEMENT-1
(C) STATEMENT-1 is True, STATEMENT-2 is False
(D) STATEMENT-1 is False, STATEMENT-2 is True
72. STATEMENT-1: Graphite conducts electricity well in a direction parallel rather than perpendicular to the planes
of hexagons.
and
STATEMENT-2: Delocalisation of electrons is in a plane parallel to the planes of hexagons.
STATEMENT-1
73. STATEMENT-1: Solution of washing soda when heated with aluminium gives hydrogen.
and
STATEMENT-2: Aluminium is amphoteric in nature.
STATEMENT-1
(110)
74. STATEMENT-1: Removal of chloride during hydrolysis of SiCl4 is favourable.
and
STATEMENT-2: Chloride is a good leaving group.
STATEMENT-1
75. STATEMENT-1: Water is hard as it contains dissolved CaCO3.
and
STATEMENT-2: Ca(HCO3)2 is more soluble in water than CaCO3.
STATEMENT-1
76. STATEMENT-1: A Pb(II) oxide is soluble in nitric acid but insoluble in sulphuric acid.
and
STATEMENT-2: PbSO4 is soluble while Pb(NO3)2 is insoluble.
STATEMENT-1
77. STATEMENT-1: Powdered silicon reacts much more rapidly with steam than a lump of silicon.
and
STATEMENT-2: Powdered silicon has larger surface area.
STATEMENT-1
(111)
78. STATEMENT-1: Tin (II) chloride crystals are not prepared by dissolving tin in HCl.
and
STATEMENT-2: Tin (II) chloride is easily hydrolysed in water.
STATEMENT-1
79. STATEMENT-1: Thermite reaction can not be stopped by water like an ordinary fire.
and
STATEMENT-2: Water not only cools the fire but also keeps oxygen out to extinguish the fire.
STATEMENT-1
80. STATEMENT-1: Anhydrous AlCl3 can be crystallised from aqueous solution.
and
STATEMENT-2: Aluminium chloride is hydrolysed easily by water.
STATEMENT-1
81. STATEMENT-1: Aqueous solution of borax and acid can be titrated like ordinary acid and base.
and
STATEMENT-2: Borax hydrolyses in water to give basic solution.
STATEMENT-1
(112)
82. STATEMENT-1: The gas produced by hydrolysis of Al4C3 does not react with bromine in dark.
and
STATEMENT-2: Bromine gives free radical reaction in light.
STATEMENT-1
83. STATEMENT-1: Aluminium can liberate SO2 gas from hot concentrated H2SO4.
and
STATEMENT-2: The Eo value of Al3+/Al is more negative than that of SO42–/SO2.
STATEMENT-1
84. STATEMENT-1: Aluminium chloride is soluble in alcohol and ether.
and
STATEMENT-2: Aluminium chloride is strongly ionic in character.
STATEMENT-1
85. STATEMENT-1: BF3 is the weakest Lewis acid amongst BX3.
and
STATEMENT-2: Fluorine is the strongest electronegative element.
STATEMENT-1
(113)
86. STATEMENT-1: Borazine is more reactive than benzene.
and
STATEMENT-2: B = N bonds are polar whereas C = C bonds are not.
STATEMENT-1
  
(114)

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Chapter 11

The p-Block Elements

Straight Objective Type

1. Boron cannot form which one of the following anions?

2. Carbon cannot be used in the reduction of Al2O3 because :

(B) The enthalpy of formation of CO2 is more than that of AI2O3

(C) Pure carbon is not easily available

(D) The enthalpy of formation of AI2CO3 is too high

(A) NaAI(OH)4 only (B) Na2Ti(OH)6 only

(C) NaAI(OH)4 and Na2SiO3 both (D) Na2SiO3 only

4. Which is a correct statement about diborane structure?

5. Which one of the following is the correct statement?

(A) Boric acid is a protonic acid

(B) Beryllium exhibits coordination number of six

(D) B2H6.2NH3 is known as inorganic benzene

I. During Hall’s process, silica is removed as Si (vapour).

II. Bauxite ore contaminated with Fe2O3 is purified by Baeyer’s process.

III. During serpeck’s process. AIN is formed.

The correct choice is :

7. In diborane the two H – B – H angles are nearly :

8. What product is formed on heating lead nitrate?

(A) PbO + NO + O2 (B) PbO + NO2 + O2 (C) Pb + NO2 (D) PbO + N2

(A) Corundum (B) Quartz (C) Silica (D) Carborundum

10. The incorrect statement/s among the following is/are :

I. NCI5 does not exist while PCI5 does

II. Lead prefers to form tetravalent compounds

IV. Both O2 and NO are paramagnetic

(A) They are used as cation exchangers

(C) Zeolites are aluminosilicates having three dimensional network

13. Addition of SnCl2 to HgCl2 gives precipitate :

(A) White turning to red (B) White turning to grey

(C) Black turning to white (D) None of the above

(B) Silicon atom is bonded to two oxygen atoms

(A) C >> Si > Ge = Sn > Pb (B) C << Si < Ge = Sn < Pb

(C) C >> Si < Ge < Sn < Pb (D) C >> Si = Ge = Sn > Pb

16. When tin is treated with concentrated nitric acid :

(C) It is converted into metastannic acid (D) It becomes passive

Multiple Correct Answer Type

17. CO2 is iso-structural with

(A) SnCl2 (B) HgCl2 (C) C2H2 (D) NO2

18. The true facts about CO are

(A) reduces I2O5 to I2 (B) reduces Fehling’s solution to Cu2O

19. Which of the following metal(s) can form acetylides ?

(A) Ag (B) Cu (C) Ca (D) Be

20. Tick the correct statement(s)

(A) Electron affinity of lead is lower than that of tin.

(B) Lead dioxide is an oxidising agent

(C) Lead has higher ionisation potential than tin

(D) Lead is a metalloid

21. Which is (are) not probable units of silicates ?

(A) (Si2O5)2– (B) (SiO3)2– (C) (Si2O10)6– (D) (Si2O8)6–

22. When heated with concentrated H2SO4, K4Fe(CN)6 gives

(A) CO2 (B) K2SO4 (C) CO (D) HCN

(C) CO2 is heated in presence of coke (D) Fermentation of sugar

24. Pick the facts about CO2

(C) It is little soluble in water (D) A very good oxidising agent

25. In which of the following reaction(s) a carbonate is produced ?

(C) Ca(OH)2 + CO2 (excess)  (D) Al2(SO4)3 + NaHCO3 