Chemistry Chapter 3 – Group IIIA and IVA Elements (Class 12) for FSC, Entry Tests & NTS Preparation
Chapter 3, Group IIIA and IVA Elements, is an important topic for Class 12 students preparing for FSC board exams and medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, and NTS exams. This chapter explains the properties, trends, and chemical behavior of Group 13 (Boron family) and Group 14 (Carbon family) elements. Understanding these groups is essential for studying their compounds, reactions, and industrial applications.
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Burning of amorphous Boron in air forms
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:
Which of the following transition metals has the highest variable oxidation state?
NUMS 2019 Cancelled
Chemistry
d and f Block Elements
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Which one is not the type of Boric Acid?
Which of the following elements of Group 3 is non-metallic in character?
EDTA ion is a ________ ligand.
NTS 2012
Chemistry
d and f Block Elements
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Impurities of lead in silver are removed by:
NUMS 2016
Chemistry
d and f Block Elements
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Which of the following is not an interstitial compound?
NTS 2014
Chemistry
d and f Block Elements
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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
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) Which one of the following is metalloid?
Transition Elements usually show:
NUMS 2015
Chemistry
d and f Block Elements
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Identify from the following the example in which the complex is an anion:
NTS 2016 SMBBMC
Chemistry
d and f Block Elements
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Which one of the following ions exhibits d-d transition and paramagnetism as well?
NTS 2014
Chemistry
d and f Block Elements
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Which one of the following is an acid?
Prussian blue is:
NUMS 2014
Chemistry
d and f Block Elements
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The transition element which does not show variable valency is:
PMC 2020
Chemistry
d and f Block Elements
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Aluminum reacts with H2SO4 to produce
Aluminium is a
The octahedral geometry of the complex [Co(NH3)6]2+ has hybridization:
NUMS 2019 Reconduct
Chemistry
d and f Block Elements
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In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn +2 and :
PMC 2020
Chemistry
d and f Block Elements
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The formula of cryolite is
The total number of transition elements is:
NUMS 2019 Reconduct
Chemistry
d and f Block Elements
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Valence electronic configuration Cu+2 is (29Cu)
NUMS 2019 Reconduct
Chemistry
d and f Block Elements
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Which of the following forms a layer of oxide on its exposure to moisture?
Chromium dissolves in dilute H2SO4 for [Cr(H2O)6]2. The colour of the ion is:
NUMS 2016
Chemistry
d and f Block Elements
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The oxidation states of Boron are:
Variable valency is generally exhibited by:
NUMS 2014
Chemistry
d and f Block Elements
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Which element of group 4A shows inert pair effect?
Which of the following has the maximum number of unpaired d electrons?
NTS 2016 DUHS & JSMU
Chemistry
d and f Block Elements
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Aluminum silicate is used In:
The color of transition metal complexes is due to transition of electrons between:
NUMS 2019 Reconduct
Chemistry
d and f Block Elements
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Ability of carbon to form long chains and rings is known as?
What is the chemical name of SANDUR?
silicon can be obtained from which one of the following compounds
IUPAC name for [Pt Cl Br (NO2) (NH3)3] Cl is:
NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:
Which element among the following forms a protective oxide coating on exposure to air?
Aluminium is in Nature
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
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) Aluminium is agent?
Chemical formula of powder used in carom board is?
Solubility of Borax decahydrate at 100C is
Boric acid is used in
Which of the following is used to make container for nitric acid?
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
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Borax bead test is used to separate:
Electronic configuration of chromium (Proton number 24) is:
PMC 2020
Chemistry
d and f Block Elements
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Orthoboric acid can NOT be obtained by which of the following?
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 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
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Key Concepts about Group IIIA and IVA Elements
The chapter explains the general characteristics of Group 13 and 14 elements, including electronic configuration, physical and chemical properties, and oxidation states. It covers the preparation, properties, and uses of important compounds such as borates, alumina, carbides, oxides, and halides. The chapter also discusses trends in atomic and ionic radii, electronegativity, and ionization energy, as well as the role of these elements in biological and industrial processes. Each concept is illustrated with examples, diagrams, and step-by-step explanations. These concepts are highly important for FSC board exams and entry tests like MDCAT, NUMS, AKU, NUST, and ECAT.
Free Entry Test Preparation
Mastery of Group IIIA and IVA elements helps students understand chemical reactivity, solve numerical and conceptual problems, and apply concepts to real-world chemical processes and industrial applications. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.
JazakAllah.
