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Main Group Elements


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20 Questions MCQ Test GATE Chemistry Mock Test Series | Main Group Elements

Main Group Elements for Chemistry 2022 is part of GATE Chemistry Mock Test Series preparation. The Main Group Elements questions and answers have been prepared according to the Chemistry exam syllabus.The Main Group Elements MCQs are made for Chemistry 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Main Group Elements below.
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Main Group Elements - Question 1

Select the energy band which represent the electrical conductivity in direction parallel to chain in graphite

Detailed Solution for Main Group Elements - Question 1

Graphite behave as semimetal in direction parallel to chain. Second band represent the band structure of semimetal. Hence, correct option is (b)

Main Group Elements - Question 2

KMg3(OH)2Si3AlO10 is an example of

Detailed Solution for Main Group Elements - Question 2

Main Group Elements - Question 3

Correct order of metal ion regarding logβ value for [M-crown-6]+ in gas phase is

Detailed Solution for Main Group Elements - Question 3

In gas phase, ion tends to form stable complex with ligand having more contact point (donor atom) rather than more preference to cavity size. Hence, Na+ due to high charge density than K+ favour crown-6 more than K+ in gas phase. Correct option is (b)

Main Group Elements - Question 4

Reaction of S4N4 with metallic potassium or sodium leads to formation of

Detailed Solution for Main Group Elements - Question 4

Main Group Elements - Question 5

Reaction of B2H6 with Na/Hg leads to formation of​

Detailed Solution for Main Group Elements - Question 5

Main Group Elements - Question 6


The formula and type of above borate is 

Detailed Solution for Main Group Elements - Question 6

In the above diagram, two oxygen atom is shared hence it is metaborate.

*Answer can only contain numeric values
Main Group Elements - Question 7

Number of cluster electron pair in [In4Bi5]3- is ________


Detailed Solution for Main Group Elements - Question 7

*Answer can only contain numeric values
Main Group Elements - Question 8

The number of Banana bond in B5H9 is _____


Detailed Solution for Main Group Elements - Question 8

STYX code of B5H9 = 4120 where S represents number of  bond also called Banana Bond.

*Answer can only contain numeric values
Main Group Elements - Question 9


31P NMR spectrum of cation shows _____doublet of equal intensity


Detailed Solution for Main Group Elements - Question 9

*Answer can only contain numeric values
Main Group Elements - Question 10


Number of species paramagnetic in nature is/are______


Detailed Solution for Main Group Elements - Question 10

*Answer can only contain numeric values
Main Group Elements - Question 11

Hydrolysis of P2X4 produces an acid which have basicity _________


Detailed Solution for Main Group Elements - Question 11

Main Group Elements - Question 12

Electrophilic substitution reaction of terminal H atom attached to B in closo-1, 2 C2B10H12 follow the sequence

Detailed Solution for Main Group Elements - Question 12

Terminal H atom attached to Boron undergo facile electrophilic substitution and sequence of reactivity follow the sequence of negative charge density on B–Ht group.
More the distance from carbon = more the reactivity towards nucleophile.

Main Group Elements - Question 13


The correct statement regarding P is/are
(I) electrical conductivity decreases with increase in temperature
(II) M-graphite compounds are coloured.
(III) Mechanism of conductivity in M-graphite complexes are similar to conductivity in n-type semiconductors.
(IV) In product planarity and delocalization of layers are retained.

Detailed Solution for Main Group Elements - Question 13

Metal graphite complexes has conductivity like Metals and their conductivity decreases with increase in temperature.
These complexes have excess electron in valence band. Hence, their conductivity is due to migration of free electron.

Main Group Elements - Question 14

Match Column-A (species) with Column-B (properties related to species)

Detailed Solution for Main Group Elements - Question 14

Main Group Elements - Question 15


Correct statement regarding A is/are
(1) It has T-shaped structure
(2) 129Xe NMR spectrum show a triplet
(3) 19F NMR spectrum show four signal
(4) It has TBP geometry

Detailed Solution for Main Group Elements - Question 15


Main Group Elements - Question 16


Correct statement regarding A and B are
(1) A is very strong oxidising agent

(4) B is strong oxidising agent.

Detailed Solution for Main Group Elements - Question 16

Main Group Elements - Question 17


In the above reaction A and B respectively are 

Detailed Solution for Main Group Elements - Question 17

Main Group Elements - Question 18

Correct statement regarding C60 is/are
(1) It has Ih point group
(2) Its satisfies IPR
(3) It has two kind of C–C bond length
(4) It is more reactive than graphite

Detailed Solution for Main Group Elements - Question 18

No pentagons are adjacent to each other in C60 and also it has two kinds of bond length, one between two hexagon and one between one hexagon and pentagon.

Main Group Elements - Question 19

CH3Cl + Si + HCI → (A) 
The (C) is

Detailed Solution for Main Group Elements - Question 19

*Answer can only contain numeric values
Main Group Elements - Question 20

Number of framework electron in carbonanes C2B5H7 is ________


Detailed Solution for Main Group Elements - Question 20

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