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Test: Main Group- 3


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

Test: Main Group- 3 for Chemistry 2022 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 2022 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

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:

Test: Main Group- 3 - Question 2

Which of the following fluorides is not formed by xenon:

Test: Main Group- 3 - Question 3

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

Test: Main Group- 3 - Question 4

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

Test: Main Group- 3 - Question 5

Color of the flame in the test for Barium is:

Test: Main Group- 3 - Question 6

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:

Test: Main Group- 3 - Question 7

The most abundant noble gas in air is:

Test: Main Group- 3 - Question 8

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

Test: Main Group- 3 - Question 9

The role of phosphate in detergent power is to:

Test: Main Group- 3 - Question 10

Oxygen has a positive oxidation state in:

Test: Main Group- 3 - Question 11

Which of the following interhalogen compounds does not exist:

Test: Main Group- 3 - Question 12

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

Test: Main Group- 3 - Question 13

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

Test: Main Group- 3 - Question 14

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

Test: Main Group- 3 - Question 15

Ozone layer is a protective shield against:

Test: Main Group- 3 - Question 16

Essential constituent of an amalgam is:

Test: Main Group- 3 - Question 17

The structure of hyponitrous acid molecule (H2N2O2) is:

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

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



Here A, B and C respectively are:

Test: Main Group- 3 - Question 19

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

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

Test: Main Group- 3 - Question 20

Which ones of the following compounds do not exist:

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

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

Alkalides and electrides are crystalline compound of:

Test: Main Group- 3 - Question 22

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

Test: Main Group- 3 - Question 23

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

Test: Main Group- 3 - Question 24

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

Test: Main Group- 3 - Question 25

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

Test: Main Group- 3 - Question 26

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

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.

Mg3​N2​+6H2​O⟶3Mg(OH)2​+2NH3​ 

Test: Main Group- 3 - Question 27

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

Test: Main Group- 3 - Question 28

BaSO4 is insoluble in a water because:

Test: Main Group- 3 - Question 29

Metals are more reactive with oxygen

Test: Main Group- 3 - Question 30

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

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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