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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.
Borax is _______.
Na2[B4O5(OH)4).8H2O
Na2[B4O5(OH)6).7H2O
Na2[B4O3(OH)8].6H2O
Na2[B4O2(OH)10).5H2O
2.
The silicates which contain discrete tetrahedral units are _______.
ortho silicates
sheet silicates
pyrosilicates
three dimensional silicates
3.
Group 14 elements have general electronic configuration _______.
ns2
ns2np4
ns2np6
ns2np2
4.
All elements except carbon have the tendency to show maximum covalency of six ______
due to presence of vacant d-orbitals
due to absence of vacant d-orbitals
due to presence of partially filled d-orbitals
due to presence of completely filled d-orbitals
5.
Elements of group 13 mainly form covalent compounds because ______
small size
electro negativity values are high
ionization energy is very high
both (a) and (c)
1.
(a)
Na2[B4O5(OH)4).8H2O
2.
(b)
sheet silicates
3.
(d)
ns2np2
4.
(a)
due to presence of vacant d-orbitals
5.
(d)
both (a) and (c)
12th Standard Syllabus & Materials
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