12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
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
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 27/08/2019
Transition and Inner Transition Elements
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.
The trend in ionisation enthalpy of a transition element is not regular because,_______.
removal of one electron alters the relative energies of 4s and 3d orbitals
due to different electronic configuration (stability)
Poor screening of 3p-orbital
due to decrease in effective nuclear charge
2.
Identify the paramagnetic species.
Cu+
Cr+
MnO4
Zn2+
3.
The highest possible oxidation state shown by osmium in its compound is_______.
+4
+6
+8
+10
4.
Hybridisation of chromium ions and dichromate ions is ________.
Sp2
Sp3d
both (a) and (b)
None of these
5.
Which of the following is wrong with respect to lanthanide contraction?
Decrease in ionic radii
Increase in tendency to act as reducing agents
Decrease in basic character
Resembles second and third row of d-block elements
6.
Which of the following statements is not true?
on passing H2S, through acidified K2Cr2O7 solution, a milky colour is observed
Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis
K2Cr2O7 solution in acidic medium is orange in colour
K2Cr2O7 solution becomes yellow on increasing the PH beyond 7
7.
8.
The alloy of copper that contain Zinc is________.
Monel metal
Bronze
bell metal
brass
9.
The correct order of increasing oxidizing power in the series _______.
VO2+ < Cr2O72- < MnO4-
Cr2O72- < VO2+ < MnO4-
Cr2O72- < MnO4- < VO2+
MnO4- < Cr2O72- < VO2+
10.
Sc (Z = 21) is a transition element but Zinc (z = 30) is not because _______.
both Sc3+ and Zn2+ ions are colourless and form white compounds
In case of Sc, 3d orbital are partially filled but in Zn these are completely filled
last electron as assumed to be added to 4s level in case of zinc
both Sc and Zn do not exhibit variable oxidation states
11.
f - block elements
12.
Metallothermic
13.
Lanthanide
14.
Zr and Hf
15.
Oxocations
1.
(a)
removal of one electron alters the relative energies of 4s and 3d orbitals
2.
(b)
Cr+
3.
(c)
+8
4.
(b)
Sp3d
5.
(b)
Increase in tendency to act as reducing agents
6.
(b)
Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis
7.
(b)
8.
(d)
brass
9.
+5 +6 +7
VO2+ < Cr2O72- < MnO4-
Greater the oxidation state, higher is the oxidising power.
10.
(b)
In case of Sc, 3d orbital are partially filled but in Zn these are completely filled
11.
Rare earth elements
12.
Lanthanide-thermic process
13.
Monazite sand
14.
Similar size
15.
Actinides
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு எடுத்துக்காட்டுகள் மற்றும் நெறிமுறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
