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Test: Main Group- 3 - Chemistry MCQ

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30 Questions MCQ Test Inorganic Chemistry - Test: Main Group- 3

Test: Main Group- 3 for Chemistry 2024 is part of Inorganic Chemistry preparation. The Test: Main Group- 3 questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Main Group- 3 MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Main Group- 3 below.

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Test: Main Group- 3 - Question 1

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If hydrogen sulphide gas is passed through an acidified solution containing a mixture of the sulphates of cadmium, nickel and zinc, which sulphide /sulphides will be precipitated:

A.
CdS and NiS
B.
NiS and ZnS
C.
NiS
D.
CdS

Test: Main Group- 3 - Question 2

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Which of the following fluorides is not formed by xenon:

A.
XeF₂
B.
XeF₃
C.
XeF₄
D.
XeF₆

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Test: Main Group- 3 - Question 3

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Consider the coordination compound, K₂[Cu(CN)₄]. A coordinate covalent bond exists between

A.
K⁺ and CN^-
B.
Cu²⁺ and CN^-
C.
K⁺ and [Cu(CN)₄]^2-
D.
C and N in CN^-

Test: Main Group- 3 - Question 4

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Reaction of Cu metal with conc. HNO₃ will produce Cu(NO₃)₂ and:

A.
H₂
B.
N₂ and H₂O
C.
H₂ and NO₂
D.
NO₂ and H₂O

Test: Main Group- 3 - Question 5

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Color of the flame in the test for Barium is:

A.
Golden yellow
B.
Crimson red
C.
Apple green
D.
Intense blue

Test: Main Group- 3 - Question 6

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Among the three allotropes of an element, one is a good electrical conductor, the second one is known to be one of the hardest materials and the third one has a molecule form with an icosahedral structure. The element is:

A.
Boron
B.
Carbon
C.
Silicon
D.
Sulfur

Test: Main Group- 3 - Question 7

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The most abundant noble gas in air is:

A.
Neon
B.
Helium
C.
Xenon
D.
Argon

Test: Main Group- 3 - Question 8

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The dodecaborate ion, [B₁₂H₁₂]^2– is a:

A.
Arachno borane
B.
Closo borane
C.
Nido borane
D.
Linear borane

Test: Main Group- 3 - Question 9

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The role of phosphate in detergent power is to:

A.
Control pH level of the detergent water mixture.
B.
Prevent liquid detergent from solidifying.
C.
Provide whiteness to the fabric.
D.
Remove Ca²⁺ and Mg²⁺ ions from the water.

Test: Main Group- 3 - Question 10

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Oxygen has a positive oxidation state in:

A.
O₂F₂
B.
Na₂O₂
C.
Cl₂O₂
D.
H₂O₂

Test: Main Group- 3 - Question 11

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Which of the following interhalogen compounds does not exist:

A.
ClF₃
B.
FCl₃
C.
IF₅
D.
BrF₃

Test: Main Group- 3 - Question 12

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Based on Wade’s rules of electron counting, structure of carborane, CB₈H₁₄, is expected to be:

A.
Closo
B.
Nido
C.
Arachno
D.
Galacto

Test: Main Group- 3 - Question 13

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XeF₆ cannot be handled in a quartz vessel, because it reacts with SiO₂ forming:

A.
XeOF₄
B.
XeF₄
C.
XeF₂
D.
XeO₄

Test: Main Group- 3 - Question 14

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Metallic potassium on treatment with liquid NH₃ in the presence of catalytic amount of Fe₂O₃ provides:

A.
KNH₂
B.
Solvated e^–
C.
KOH
D.
KO₂

Test: Main Group- 3 - Question 15

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Ozone layer is a protective shield against:

A.
Ultraviolet light
B.
Visible light
C.
Infrared rays
D.
Cosmic rays

Test: Main Group- 3 - Question 16

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Essential constituent of an amalgam is:

A.
Ag
B.
Hg
C.
Mg
D.
Fe

Test: Main Group- 3 - Question 17

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The structure of hyponitrous acid molecule (H₂N₂O₂) is:

A.
Linear (A –B–C–D type)
B.
C.
D.

Detailed Solution for Test: Main Group- 3 - Question 17

Correct Answer :- C

Explanation : Trans and cis are the two possible structures of hyponitrous acid. White crystals are obtained from trans-hyponitrous which are explosive when dry and it is a weak acid which decomposes to nitrous oxide when in aqueous solution. Sodium salt can be obtained from cis acid.

Test: Main Group- 3 - Question 18

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What are A, B and C in the following reactions:

Here A, B and C respectively are:

A.
Borane, B₂O₃ and B₄H₈
B.
2BH₃ . NH₃ , H₃BO₃ + H₂ , B₁₀H₁₄
C.
BN, H₃BO₃ only, B₄H₈
D.
BN, H₃BO₃ + H₂, B₄H₈

Test: Main Group- 3 - Question 19

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Which one of the following contain (3c–2e) bonds:

(I) Mg(CH₃)₂
(II) BeCl₂
(III) BeH₂
(IV) Be(NO₃)₂

A.
I, II and III
B.
I and III
C.
I, III, and IV
D.
II and III

Test: Main Group- 3 - Question 20

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Which ones of the following compounds do not exist:

(I) AuXe₄
(II) BeCl₂
(III) ArF₂
(IV) He–F

A.
III and I
B.
I and IV
C.
II and IV
D.
none of these

Detailed Solution for Test: Main Group- 3 - Question 20

Correct Answer :- option B

Explanation : a) The existence and structure of this novel compound was revealed from a single-crystal structure determination where it exists as [AuXe₄][Sb₂F₁₁]₂.

b) Beryllium chloride is an inorganic compound with the formula BeCl₂. It is a colourless, hygroscopic solid that dissolves well in many polar solvents. Its properties are similar to those of aluminium chloride, due to beryllium's diagonal relationship with aluminium.

c) Argon difluoride, ArF₂, is predicted to be stable at pressures over 57 GPa. It should be an electrical insulator.

d) It exist as HeF^-.

Test: Main Group- 3 - Question 21

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Alkalides and electrides are crystalline compound of:

A.
Alkali metals in (+1) oxidation states and electrons respectively.
B.
Alkali metals in (–1) oxidation states and electron acting as anion.
C.
Methyl group and electron acting as anion respectively.
D.
Methyl group and alkali metal group.

Test: Main Group- 3 - Question 22

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Among the molecules, BiF₃, BiCl₃ BiBr₃ and BiI₃, the one which is most coloured is:

A.
BiF₃
B.
BiBr₃
C.
BiCl₃
D.
BiI₃

Test: Main Group- 3 - Question 23

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Given the following reaction conditions for the formations of the fluorides of Xe:

A.
XeF₄, XeF₂, XeF₆
B.
XeF₂, XeF₄, XeF₆
C.
XeF₆, XeF₄, XeF₂
D.
XeF₂, XeF₆, XeF₄

Test: Main Group- 3 - Question 24

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In the preparation of P₄O₆, a mixture of N₂ and oxygen is used instead of pure oxygen. The reason is:

A.
Pure oxygen will form ozone in presence of P.
B.
Pure oxygen will form P₄O₁₀ despite excess of P4, in pure oxygen.
C.
Pure oxygen will form [P(O₃)₄] ozonide.
D.
Pure oxygen will not react with P. N₂ acts as a catalyst.

Test: Main Group- 3 - Question 25

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Arsenic, antimony and bismuth react with concentrated HNO₃. These give respect ively:

A.
H₃AsO₄, H₃SbO₂, (BiO₃)^– ion.
B.
H₃AsO₄, Sb₂O₃, (BiO₃)^– ion.
C.
As₂O₃, Sb₂O₃, Bi₂O₃.
D.
H₃AsO₄, Sb₂O₅ and Bi³⁺ ion.

Test: Main Group- 3 - Question 26

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One mole of magnesium nitride on the reaction with an excess of water gives

A.
one mole of ammonia
B.
one mole of nitric acid
C.
two moles of ammonia
D.
two moles of nitric acid

Detailed Solution for Test: Main Group- 3 - Question 26

One mole of magnesium nitride on the reaction with an excess of water gives two moles of ammonia and 3 moles of magnesium hydroxide.

Mg₃N₂+6H₂O⟶3Mg(OH)₂+2NH₃

Test: Main Group- 3 - Question 27

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Solution of alkali metals in liquid NH₃ conducts electricity. It is due to formation of:

A.
Na⁺ + Na^– ion in liquid ammonia.
B.
Na⁺ + e^– (NH₃)x in liquid ammonia.
C.
Na^–, (NH₂)^– and NH₄⁺ ion in liquid NH3.
D.
The solution conducts like a metallic conductor with solvated electrons carrying the charge.

Test: Main Group- 3 - Question 28

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BaSO₄ is insoluble in a water because:

A.
Hydration energy is equal to lattice energy.
B.
Hydration energy is more than lattice energy.
C.
Lattice energy is more than hydrogen energy.
D.
BaSO₄ does not form hydrogen bonds with water molecules.

Test: Main Group- 3 - Question 29

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Metals are more reactive with oxygen

A.
across the periodic table
B.
across the Period 2
C.
down the Group-II
D.
up the Group-II

Test: Main Group- 3 - Question 30

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How many moles of P₄O₁₀ will react with one mole of water:

A.
2 moles
B.
1/6 mole
C.
1/3 mole
D.
6 moles

Detailed Solution for Test: Main Group- 3 - Question 30

The coefficients in the balanced chemical equation provide us with information that we can use to build this conversion factor. They tell us that six molecules of H₂O are needed to react with one molecule of P₄O₁₀ in order to produce four molecules of phosphoric acid:

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