FSC Chemistry MCQs Chapter 3 Class 12 - PLS Prep by PakLearningSpot

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Created on February 10, 2022

Chemistry Ch 3 Class 12 s and p Block Elements

1 / 49

Which one of the following is an acid?

H3BO3

Al(0H)3

Ca(0H)2

NaOH

2 / 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+

3 / 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

4 / 49

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

Catenation

Supplementation

Adulteration

Addition

5 / 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

6 / 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+

7 / 49

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

Aluminum

Iron

Steel

Copper

8 / 49

) Aluminium is agent?

Good oxidizing

Weak reducing

Good reducing

Both oxidizing and reducing agent

9 / 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-

10 / 49

Burning of amorphous Boron in air forms

B(OH)3

B203

Mixture of B203& BN

11 / 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

12 / 49

Aluminum reacts with H2SO4 to produce

Al2(S04))

SO3

SO2

13 / 49

Which element of group 4A shows inert pair effect?

14 / 49

Aluminium is a

Insulator

Conductor

Semi-Conductor

Photo Conductor

15 / 49

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

Metaboricacid

Tetraboric acid

) Pyroboric acid

Boric anhydride

16 / 49

Aluminum silicate is used In:

Cement

Glass

Urea

None of these

17 / 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

18 / 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

19 / 49

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

Nitrogen

Aluminium

Boron

20 / 49

Which one is not the type of Boric Acid?

Ortho boric Acid

Nano boric acid

Meta boric Acid

Pyro boric acid

21 / 49

Boric acid is used in

Washing wounds

Eye-wash

Detergents

Washing powder

22 / 49

silicon can be obtained from which one of the following compounds

Water

Sand

Potash

None

23 / 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

24 / 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

25 / 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

26 / 49

Chemical formula of powder used in carom board is?

NaHCO3

H3B03

Na2CO3

K2CO3

27 / 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

28 / 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

29 / 49

The oxidation states of Boron are:

+1,+2 and +3

-1, -2 and -3

+1 and -1

+3 and -3

30 / 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

31 / 49

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

32 / 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

33 / 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+

34 / 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

35 / 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

36 / 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

37 / 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

38 / 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

39 / 49

EDTA ion is a ________ ligand.

NTS 2012
Chemistry
d and f Block Elements
Elimination Tool:

A) Monodentate

B) Bidentate

C) Tridentate

D) Polydentate

40 / 49

What is the chemical name of SANDUR?

Tetraplumbic oxide

Triplumbic oxide

Triplumbic tetraoxide

Lead dioxide

41 / 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

42 / 49

) Which one of the following is metalloid?

43 / 49

Borax bead test is used to separate:

) Metallic cations

Non-metallic cations

Metallic anions

Non-metallic anions

44 / 49

Aluminium is in Nature

Acidic

Basic

Amphoteric

Salt

45 / 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

46 / 49

The formula of cryolite is

Na2AIF6

Na3AIF3

Na3AIF6

Na2AlCl6

47 / 49

Solubility of Borax decahydrate at 100C is

63 grams

113 grams

99.3 grams

58.5 grams

48 / 49

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

iron

Plastic

Alumuium

Helim

49 / 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

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The average score is 58%

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