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Published on: 01/09/2022
QB365 provides a detailed and simple solution for every Possible Creative Questions in Class 12 Chemistry Subject - p - Block Elements - I, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test
1.
In graphite electrons are _______.
localised on each C-atom
localised on every third C-atom
delocalised within the layer
present in anti-bonding orbital
2.
Boron compounds behave as Lewis acid, because of their _______.
ionisation property
acidic nature
covalent nature
electron deficient nature
3.
Which of the following statements about H3BO3 is not correct?
It has a layer structure in which planar BO3 units are joined by H-bonds
It is a strong tribasic acid
It is prepared by acidifying an aqueous solution of borax
It does not act as proton donor but acts as lewis acid by accepting hydroxyl ion
4.
Identify the electron - deficient species
(BH3)2
(SiH3)2
PH3
(CH3)2
5.
Which of the following oxide is amphoteric?
SiO2
CO2
SnO2
CaO
6.
Which one is correct statement for zeolite?
Zeolites are aluminosilicates having three dimensional framework
Hydrate zeolites are used as ion exchangers in hardening of soft water
Zeolites are alumino silicates
all the above
7.
SiO44- ion has ____ geometry.
Triangular
Tetrahedral
Linear
Pentagonal bipyramidal
8.
Graphite has _______.
2-d sheet structure
Vander waals force between successive layers of carbon sheets
Sp2 hybridised carbon linked with other three carbon atoms in hexagonal planar structure
all the above
9.
Chemical formula of phosgene is_______.
COCl2
CaOCl2
CaCO3
COCI
10.
Which one of the following compounds has similar structure to that of graphite?
Boron nitride
Boron Carbide
Aluminium Carbide
Aluminium Oxide
11.
The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.
TI < In < Ga < Al
In < TI < Ga < Al
Ga < In < Al < TI
Al < Ga < In < TI
12.
Select the incorrect statement regarding B2H6.
It contains B-B ionic bond
Each boron is Sp3 hybridised
It has two types of hydrogen bonds
it is used as a reducing agent
13.
Lewis acid character of boron trihalides is as a follows _______.
BF3 > BCl3 > BBr3 > BI3
BCI3 > BF3 > BBr3 > BI3
BI3 > BBr3 > BCl3 > BF3
BI3 > BF3 > BCl3 > BBr3
14.
Thermodynamically the most stable form of carbon is________.
Diamond
graphite
Fullerene
none of these
15.
AlF3 is soluble in HF only in the presence of KF. It is due to the formation of _________.
K3[AIF3H3]
K3[AiF6]
AIH3
K[AIF3H]
1.
(c)
delocalised within the layer
2.
(d)
electron deficient nature
3.
(b)
It is a strong tribasic acid
4.
(a)
(BH3)2
5.
(c)
SnO2
6.
(d)
all the above
7.
(b)
Tetrahedral
8.
(d)
all the above
9.
(a)
COCl2
10.
(a)
Boron nitride
11.
(d)
Al < Ga < In < TI
12.
(a)
It contains B-B ionic bond
13.
(c)
BI3 > BBr3 > BCl3 > BF3
14.
(b)
graphite
15.
(b)
K3[AiF6]
12th Standard Syllabus & Materials
12th Standard
TN 12th Standard Physics Electronics and Communication Creative Questions Study Material - QB365 Set B
NEW12th Standard
TN 12th Standard Physics Electronics and Communication Creative Questions Study Material - QB365 Set A
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TN 12th Standard Physics Wave Optics Creative Questions Study Material - QB365 Set C
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