12th Standard Syllabus & Materials
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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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Published on: 18/06/2021
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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.
The high reactivity of fluorine is due to________.
high ionisation energy
low bond dissociation energy
low electron affinity
high electro negativity
2.
The ionisation energy of Ga is higher than that of Al because of_________
more effective nuclear charge of Ga
smaller atomic size of Ga
larger size of Ga
both (a) and (b)
3.
Which reaction is not feasible.
\({ 2H }_{ 2 }O+{ 2F }_{ 2 }\longrightarrow 4HF+{ O }_{ 2 }\)
\(2 \mathrm{KBr}+\mathrm{I}_{2} \longrightarrow 2 \mathrm{KI}+\mathrm{Br}_{2}\)
\(2KBr+{ Cl }_{ 2 }\longrightarrow 2KCl+{ Br }_{ 2 }\)
\(2 \mathrm{KI}+\mathrm{Br}_{2} \longrightarrow 2 \mathrm{KBr}+\mathrm{I}_{2}\)
4.
Strong reducing behaviour of H3PO2 is due to______.
High oxidation state of phosphorus
High electro gain enthalpy of phosphorus
Presence of two-OH groups and one P-H bond
Presence of one-OH groups and two P-H bonds
5.
The incorrect statement regarding structure of ozone is______.
Bond angle is less than 120°
It is linear
The two oxygen-oxygen bond length in ozone are identical
Both (b) and (c).
1.
(b)
low bond dissociation energy
2.
(d)
both (a) and (b)
3.
(b)
\(2 \mathrm{KBr}+\mathrm{I}_{2} \longrightarrow 2 \mathrm{KI}+\mathrm{Br}_{2}\)
4.
(d)
Presence of one-OH groups and two P-H bonds
5.
(b)
It is linear
12th Standard Syllabus & Materials
12th Standard
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