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Main Group Elements - GATE Chemistry MCQ


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

Main Group Elements for GATE Chemistry 2024 is part of GATE Chemistry Mock Test Series preparation. The Main Group Elements questions and answers have been prepared according to the GATE Chemistry exam syllabus.The Main Group Elements MCQs are made for GATE Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Main Group Elements below.
Solutions of Main Group Elements questions in English are available as part of our GATE Chemistry Mock Test Series for GATE Chemistry & Main Group Elements solutions in Hindi for GATE Chemistry Mock Test Series course. Download more important topics, notes, lectures and mock test series for GATE Chemistry Exam by signing up for free. Attempt Main Group Elements | 20 questions in 60 minutes | Mock test for GATE Chemistry preparation | Free important questions MCQ to study GATE Chemistry Mock Test Series for GATE Chemistry Exam | Download free PDF with solutions
Main Group Elements - Question 1
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Select the energy band which represent the electrical conductivity in direction parallel to chain in graphite

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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
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KMg3(OH)2Si3AlO10 is an example of

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Main Group Elements - Question 3
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Correct order of metal ion regarding logβ value for [M-crown-6]+ in gas phase is

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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
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Reaction of S4N4 with metallic potassium or sodium leads to formation of
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Main Group Elements - Question 5
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Reaction of B2H6 with Na/Hg leads to formation of​
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Main Group Elements - Question 6
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The formula and type of above borate is 
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In the above diagram, two oxygen atom is shared hence it is metaborate.

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Main Group Elements - Question 7
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Number of cluster electron pair in [In4Bi5]3- is ________

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Main Group Elements - Question 8
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The number of Banana bond in B5H9 is _____

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

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Main Group Elements - Question 9
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31P NMR spectrum of cation shows _____doublet of equal intensity

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Main Group Elements - Question 10
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Number of species paramagnetic in nature is/are______

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Main Group Elements - Question 11
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Hydrolysis of P2X4 produces an acid which have basicity _________

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Main Group Elements - Question 12
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Electrophilic substitution reaction of terminal H atom attached to B in closo-1, 2 C2B10H12 follow the sequence
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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
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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
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Match Column-A (species) with Column-B (properties related to species)
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Main Group Elements - Question 15
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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
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Main Group Elements - Question 16
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Correct statement regarding A and B are
(1) A is very strong oxidising agent

(4) B is strong oxidising agent.
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Main Group Elements - Question 17
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In the above reaction A and B respectively are 
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Main Group Elements - Question 18
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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
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CH3Cl + Si + HCI → (A) 
The (C) is
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Main Group Elements - Question 20
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Number of framework electron in carbonanes C2B5H7 is ________

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