12th Standard Syllabus & Materials
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TN 12th English Poem - 6 - Incident of the French Camp Sample Question Papers Study Material - QB365 Set A
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TN 12th English Supplementary - 4 - The Midnight Visitor Sample Question Papers Study Material - QB365 Set A
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Published on: 13/10/2020
12th Standard Chemistry English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - Part Two
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.
Match the following
| a | Pure nitrogen | i | Chlorine |
| b | Haber process | ii | Sulphuric acid |
| c | Contact process | iii | Ammonia |
| d | Deacons Process | iv | Sodium azide (or) Barium azide |
Which of the following is the correct option?
| A | B | C | D |
| i | ii | iii | iv |
| A | B | C | D |
| ii | iv | i | iii |
| A | B | C | D |
| iii | iv | ii | i |
| A | B | C | D |
| iv | iii | ii | i |
2.
Cell equation: A + 2B- \(\rightarrow\)A2++ 2B; A2+ + 2e- \(\rightarrow\)A Eo = +0.34V and log10 K = 15.6 at 300K for cell reactions find Eo for B+ + e− \(\rightarrow\) B
0.80
1.26
-0.54
-10.94
3.
Dissociation constant of NH4OH is 1.8 x 10-5 the hydrolysis constant of NH4Cl would be _______.
1.8 × 10-19
5.55 × 10-10
5.55 × 10-5
1.80 × 10-5
4.
This reaction follows first order kinetics. The rate constant at particular temperature is 2.303 x 10-2 hour-1. The initial concentration of cyclopropane is 0.25 M. What will be the concentration of cyclopropane after 1806 minutes? (log 2 = 0.3010)
0.125 M
0.215 M
0.25 x 2.303 M
0.05 M
5.
A two dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y respectively. The simplest formula for the compound based on the unit cell from the pattern is _______.
XY8
X4Y9
XY2
XY4
6.
Choose the correct statement.
Square planar complexes are more stable than octahedral complexes
The spin only magnetic moment of [Cu(Cl)4]2- is BM and it has square planar structure.
Crystal field splitting energy \(\left( { \Delta }_{ 0 } \right) \) [FeF6]4- is higher than the \((\Delta _{ 0 })\) of [Fe(CN)6]4-
crystal field stabilization energy of [V(H2O)6]2+ is higher than the crystal field stabilization of [Ti(H2O)6]2+
7.
Which one of the following is not correct?
La(OH)3 is less basic than Lu(OH)3
In lanthanoid series ionic radius of Ln3+ ions decreases
La is actually an element of transition metal series rather than lanthanide series
Atomic radii of Zr and Hf are same because of lanthanide contract
8.
The stability of +1 oxidation state increases in the sequence ________.
Al < Ga < In < Tl
Tl < In < Ga < Al
In < Tl < Ga < Al
Ga< In < Al < Tl
9.
When copper is heated with conc HNO3 it produces ________.
Cu(NO3)2, NO and NO2
Cu(NO3)2 and N2O
Cu(NO3)2 and NO2
Cu(NO3)2 and NO
10.
Which of the following is not true with respect to Ellingham diagram?
Free energy changes follow a straight line. Deviation occurs when there is a phase change.
The graph for the formation of CO2 is a straight line almost parallel to free energy axis.
Negative slope of CO shows that it becomes more stable with increase in temperature.
Positive slope of metal oxides shows that their stabilities decrease with increase in temperature.
1.
(d)
| A | B | C | D |
| iv | iii | ii | i |
2.
(a)
0.80
3.
\(K_h= { \frac { { K }_{ w } }{ K_b } } = \frac{1 \times 10^{-14}}{1.8 \times 10^{-5}}\)
= 0.55 x 10-9 = 5.5 x 10-10
4.
\(k=\frac { 2.303 }{ t } log\frac { \left[ { A }_{ 0 } \right] }{ \left[ A \right] } \)
2.303 x 10-2 hour-1 = \(\frac { 2.303 }{ 1806 min } log\frac { \left[ { 0.25 }_{ } \right] }{ \left[ A \right] } \)
\(=\left(\frac{2.303 \times 10^{-2} hour^{-1 }\times 1806 min}{2.303}\right) = \log \left(\frac{0.25}{A}\right) \)
\(=\left(\frac{ 1806 \times 10 ^{-2}}{60}\right) = \log \left(\frac{0.25}{A}\right) \)
\(= 0.301 = \log \left(\frac{0.25}{A}\right) \)
\(=\log2 = \log \left(\frac{0.25}{A}\right) \)
\(2 = \log \left(\frac{0.25}{A}\right) \)
\([A] = \log \left(\frac{0.25}{2}\right) = 0.125 M\)
5.
(a)
XY8
6.
(d)
crystal field stabilization energy of [V(H2O)6]2+ is higher than the crystal field stabilization of [Ti(H2O)6]2+
7.
(a)
La(OH)3 is less basic than Lu(OH)3
8.
(a)
Al < Ga < In < Tl
9.
(c)
Cu(NO3)2 and NO2
10.
(b)
The graph for the formation of CO2 is a straight line almost parallel to free energy axis.
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