12th Standard Syllabus & Materials
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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 13/05/2022
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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 Test1.
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
2.
Which of the following oxide is amphoteric?
SiO2
CO2
SnO2
CaO
3.
SiO44- ion has ____ geometry.
Triangular
Tetrahedral
Linear
Pentagonal bipyramidal
4.
Chemical formula of phosgene is_______.
COCl2
CaOCl2
CaCO3
COCI
5.
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
1.
(b)
It is a strong tribasic acid
2.
(c)
SnO2
3.
(b)
Tetrahedral
4.
(a)
COCl2
5.
(d)
Al < Ga < In < TI
12th Standard Syllabus & Materials
12th Standard
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TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
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