Chemistry Group IIIA and IVA Elements MCQs Chapter 3 Class 12 - PLS Academy

Chemistry Group IIIA and IVA Elements MCQs – Chapter 3 Class 12

Chemistry Group IIIA and IVA Elements is an important chapter of Class 12 Chemistry and plays a significant role in FSc Part-II exams and entry test preparation. MCQs from this chapter are frequently included in MDCAT, NUMS, AKU, NUST, UET ECAT, and board examinations. This chapter covers key topics such as the general properties, electronic configurations, and chemical behavior of group IIIA (Boron family) and group IVA (Carbon family) elements, along with their oxides, hydrides, and important compounds.

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Created on February 10, 2022 By Ali Durrani

Chemistry Ch 3 Class 12 s and p Block Elements

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1 / 49

Ability of carbon to form long chains and rings is known as?

Catenation

Supplementation

Adulteration

Addition

2 / 49

Which element of group 4A shows inert pair effect?

3 / 49

Chromium dissolves in dilute H2SO4 for [Cr(H2O)6]2. The colour of the ion is:

NUMS 2016
Chemistry
d and f Block Elements
Elimination Tool:

A) Blue

B) Yellow

C) Brown

D) Pink

4 / 49

If a person is injected by shot of a gun and all the bullets are not removed from his body, it may cause poisoning by:

NUMS 2017
Chemistry
d and f Block Elements
Elimination Tool:

A) Hg

B) Pb

C) Fe

D) As

5 / 49

Which of the following is not an interstitial compound?

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) Cu-Zn

B) Cu-Zn-Sn

C) TiH1.73

D) V2O5

6 / 49

Which one of the following ions exhibits d-d transition and paramagnetism as well?

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) MnO4-

B) CrO42-

C) MnO42-

D) Cr2O72-

7 / 49

The color of transition metal complexes is due to transition of electrons between:

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

A) p to d orbitals

B) d to d orbitals

C) p to p orbitals

D) d to p orbitals

8 / 49

Zinc reacts with dil. H2SO4 to give H2. It also reacts with conc. H2SO4 to form SO2. In these reactions.

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) Zn reduces H+ to H2

B) Zn oxidizes H+ to H2

C) Zn reduces SO42-to SO2

D) Zn oxidises SO42- to SO2

E) Both A and C

9 / 49

A six-coordinate complex of formula CrCl3.6H2O has green color. A 0.1 M solution of the complex, when treated with an excess of AgCl, gave 28.7 g of a white precipitate. The formula of the complex would be___________.

NUMS 2019 Cancelled
Chemistry
d and f Block Elements
Elimination Tool:

A) [Cr(H2O)6]Cl3

B) [Cr(H2O)5Cl]Cl2.2H2O

C) [Cr(H2O)4Cl2]Cl.2H2O

D) [Cr(H2O)3Cl3].3H2O

10 / 49

Which one of the following is an acid?

H3BO3

Al(0H)3

Ca(0H)2

NaOH

11 / 49

Electronic configuration of chromium (Proton number 24) is:

PMC 2020
Chemistry
d and f Block Elements
Elimination Tool:

A) [Ar] 3d4 4s2

B) [Ar] 3d5 4s2

C) [Ar] 3d5 4s1

D) [Ar] 3d5 4s2

12 / 49

Which element among the following forms a protective oxide coating on exposure to air?

Nitrogen

Aluminium

Boron

13 / 49

Identify from the following the example in which the complex is an anion:

NTS 2016 SMBBMC
Chemistry
d and f Block Elements
Elimination Tool:

A) [Co(en)3](NO3)3

B) [Co(NH3)3(NO2)3]

C) K3[Co(NO2)6]

D) [Pt(NH3)2Cl4]T

14 / 49

Valence electronic configuration Cu+2 is (29Cu)

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

A) 5d6

B) 3d9

C) 3d8

D) 3d7

15 / 49

Burning of amorphous Boron in air forms

B(OH)3

B203

Mixture of B203& BN

16 / 49

Aluminum silicate is used In:

Cement

Glass

Urea

None of these

17 / 49

The formula of cryolite is

Na2AIF6

Na3AIF3

Na3AIF6

Na2AlCl6

18 / 49

Prussian blue is:

NUMS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) K2Fe[FeCN6]

B) K4[FeCN6]

C) Fe4[Fe(CN)6] 3xH2O

D) K3FeCN6

19 / 49

Aluminium is a

Insulator

Conductor

Semi-Conductor

Photo Conductor

20 / 49

Chemical formula of powder used in carom board is?

NaHCO3

H3B03

Na2CO3

K2CO3

21 / 49

) Which one of the following is metalloid?

22 / 49

silicon can be obtained from which one of the following compounds

Water

Sand

Potash

None

23 / 49

The octahedral geometry of the complex [Co(NH3)6]2+ has hybridization:

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

A) Sp3d

B) Spd6

C) Sp3d2

D) Sp2d3

24 / 49

Boric acid is used in

Washing wounds

Eye-wash

Detergents

Washing powder

25 / 49

The transition element which does not show variable valency is:

PMC 2020
Chemistry
d and f Block Elements
Elimination Tool:

A) Cu

B) Sc

C) Zn

D) Cr

26 / 49

Which of the following is used to make container for nitric acid?

iron

Plastic

Alumuium

Helim

27 / 49

Which of the following forms a layer of oxide on its exposure to moisture?

Aluminum

Iron

Steel

Copper

28 / 49

Impurities of lead in silver are removed by:

NUMS 2016
Chemistry
d and f Block Elements
Elimination Tool:

A) Parke’s process

B) Solvay process

C) Cyanide process

D) Amalgamation process

29 / 49

Aluminum reacts with H2SO4 to produce

Al2(S04))

SO3

SO2

30 / 49

Which of the following does not act as ligand in the formation of complexes?

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

A) CH3NH2

B) OH-

C) Cl-

D) NH4+

31 / 49

What is the chemical name of SANDUR?

Tetraplumbic oxide

Triplumbic oxide

Triplumbic tetraoxide

Lead dioxide

32 / 49

The total number of transition elements is:

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

A) 58

B) 48

C) 30

D) 25

33 / 49

Aluminium is in Nature

Acidic

Basic

Amphoteric

Salt

34 / 49

Scandium, Sc, is the first of the 3d blocks of elements in the Periodic table.

Which properties of Sc approve the above fact?

NUMS 2019 Cancelled
Chemistry
d and f Block Elements
Elimination Tool:

A) Sc has ionic chloride

B) Sc readily forms oxidation state of +3

C) Compounds containing the Sc3+ion are always colored.

D) Sc has ionic chloride and Sc readily forms oxidation state of +3

35 / 49

) Aluminium is agent?

Good oxidizing

Weak reducing

Good reducing

Both oxidizing and reducing agent

36 / 49

Which of the following transition metals in its ground state have unpaired electrons in an s-orbital?

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

A) Cr

B) Co

C) Fe

D) Cu

37 / 49

Transition Elements usually show:

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

A) Para magnetism

B) Diamagnetism

C) Ferromagnetism

D) Both Ferromagnetism and Paramagnetism

38 / 49

Variable valency is generally exhibited by:

NUMS 2014
Chemistry
d and f Block Elements
Elimination Tool:

A) Normal elements

B) Transition elements

C) Metallic elements

D) None of them

39 / 49

Borax bead test is used to separate:

) Metallic cations

Non-metallic cations

Metallic anions

Non-metallic anions

40 / 49

The oxidation states of Boron are:

+1,+2 and +3

-1, -2 and -3

+1 and -1

+3 and -3

41 / 49

Orthoboric acid can NOT be obtained by which of the following?

Metaboricacid

Tetraboric acid

) Pyroboric acid

Boric anhydride

42 / 49

Solubility of Borax decahydrate at 100C is

63 grams

113 grams

99.3 grams

58.5 grams

43 / 49

Which of the following elements of Group 3 is non-metallic in character?

44 / 49

Which of the following transition metals has the highest variable oxidation state?

NUMS 2019 Cancelled
Chemistry
d and f Block Elements
Elimination Tool:

A) W

B) Pt

C) Hg

D) Mn

45 / 49

Which one is not the type of Boric Acid?

Ortho boric Acid

Nano boric acid

Meta boric Acid

Pyro boric acid

46 / 49

EDTA ion is a ________ ligand.

NTS 2012
Chemistry
d and f Block Elements
Elimination Tool:

A) Monodentate

B) Bidentate

C) Tridentate

D) Polydentate

47 / 49

IUPAC name for [Pt Cl Br (NO2) (NH3)3] Cl is:

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

A) Triammine chlorobromonitroplatinum (iv) Chlorate

B) Triammine chlorobromonitroplatimate (iv) Chloride

C) Triammine bromochloronitroplatinum (iv) Chloride

D) Triammine nitrochlorobromoplatninum (iii) Chloride

48 / 49

Which of the following has the maximum number of unpaired d electrons?

NTS 2016 DUHS & JSMU
Chemistry
d and f Block Elements
Elimination Tool:

A) Mg 2+

B) Ti 3+

C) V 3+

D) Fe 2+

49 / 49

In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn +2 and :

PMC 2020
Chemistry
d and f Block Elements
Elimination Tool:

A) Cr3+

B) Ti3+

C) V3+

D) Zn2+

Your score is

The average score is 58%

Importance of Group IIIA and IVA Elements MCQs

A strong understanding of Group IIIA and IVA Elements helps students explain trends, predict chemical reactions, and compare properties within groups. Exams often include MCQs on physical and chemical properties, important compounds, and reaction mechanisms. Practicing chapter-wise MCQs improves conceptual clarity, problem-solving skills, and confidence for competitive exams.

Effective Strategy for Free Preparation

For effective preparation, students should revise periodic trends, memorize key reactions and properties, and solve topic-wise MCQs consistently. Attempting free tests and past paper questions helps identify important concepts and repeated exam patterns. PLS Academy provides structured MCQs and free resources to support Chemistry Group IIIA and IVA Elements preparation and other Class 12 Chemistry chapters.

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