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Published on: 10/11/2020
11th Standard Chemistry English Medium Free Online Test 1 Mark Questions 2020
Download Tamil Nadu 11th 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.
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1.
Identify the wrong statement.
Amongst the isoelectronic species, smaller the positive charge on cation, smaller is the ionic radius
Amongst isoelectric species greater the negative charge on the anion, larger is the ionic radius
Atomic radius of the elements increases as one moves down the first group of the periodic table
Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the periodic table.
2.
C -X bond is strongest in __________
Chloromethane
Iodomethane
Bromomethane
Fluoromethane
3.
Structure of the compound whose IUPAC name is 5,6 - dimethylhept - 2 - ene is ___________
None of these
4.
Hybridisation of central atom in PCl5 involves the mixing of orbitals __________
s, px, py, dx2 , dx2-y2
s, px . py, pxy . dx2-y2
s, px, py, pz, dx2-y2
s, px, py, dxy, dx2-y2
5.
The ratio of number of sigma (σ) and pi (л) bonds in 2- butynal is __________
8/3
5/3
8/2
9/2
6.
Equimolal aqueous solutions of NaCl and KCl are prepared. If the freezing point of NaCl is –2oC, the freezing point of KCl solution is expected to be ____________
-2oC
-4oC
-1oC
0oC
7.
The Henry's law constant for the solubility of Nitrogen gas in water at 350 K is 8 x 104 atm. The mole fraction of nitrogen in air is 0.5. The number of moles of Nitrogen from air dissolved in 10 moles of water at 350K and 4 atm pressure is ____________
4 x 10-4
4 x 104
2 x 10-2
2.5 x 10-4
8.
Consider the reaction where KP = 0.5 at a particular temperature
PCl5(g) ⇌ PCl3 (g) + Cl2 (g)
if the three gases are mixed in a container so that the partial pressure of each gas is initially 1 atm, then which one of the following is true ____________
more PCl3 will be produced
more Cl2 will be produced
more PCl5 will be produced
none of these
9.
When methane is burnt in oxygen to produce CO2 and H2O, the oxidation number of carbon changes by ____________.
-8
+4
Zero
+8
10.
How many grams are contained in 1 gram atom of Na?
13g
1 g
23 g
1/23g
11.
Which of the following is the actual configuration of Cr (Z = 24)?
1s2 2s2 2p6 3s2 3p6 3d4 4s2
1s2 2s2 2p6 3s2 3p6 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d6
1s2 2s2 2p6 3s2 3p6 3d5 4s3
12.
Consider the following statements regarding Rutherford's \(\alpha\)-ray scattering experiment.
i. Most of the \(\alpha\)-particles were deflected through a small angle.
ii. Some of \(\alpha\)-particles passed through the foil.
iii. Very few \(\alpha\)-particles were reflected back by 180o.
Which of the above statements is/are not correct.
i and ii
ii and iii
i and iii
i, ii and iii
13.
The chemical symbol of carbon and cobalt are______
Ca and CO
Ca and Cl
C and CO
Cr and Cb
14.
Which one of the following is a universal solvent?
Alcohol
Ether
CCl4
Water
15.
Which one of the following is the standard for atomic mass?
1H1
6C12
6C14
8O16
16.
Among the elements Ca, Mg, P and CI the order of increasing atomic radii is ___________
Mg < Ca < Cl < P
Cl < P < Mg < Ca
p < Cl < Ca < Mg
Ca < mg < P < Cl
17.
Ionisation enthalpy is an _____ process.
exothermic
endothermic
reversible
both (a) and (b)
18.
Which of the following processes involves absorption of energy?
Cl(g) +e- ⟶ Cl-
O-(g) +e- ⟶ O2-
O(g) +e- ⟶ O(g)-
S(g)+e- ⟶ S-(g)
19.
Across the period, Ionisation energy _______
increases
decreases
does not vary
first decreases and then increases
20.
Why Cs and K are used as electrodes in photoelectric cells ___________
Due to their less ionisation energy
Due to high ionisation energy
Due to diagonal relationship
None of these
21.
Time independent Schrodinger wave equation is ______________
\(\overset { \wedge }{ H } \psi =E\psi \)
\({ \triangledown }^{ 2 }\psi +\frac { 8{ \pi }^{ 2 }m }{ { h }^{ 2 } } (E+V)\psi =0\)
\(\frac { { \partial }^{ 2 }\psi }{ { \partial x }^{ 2 } } +\frac { { \partial }^{ 2 }\psi }{ { \partial y }^{ 2 } } +\frac { { \partial }^{ 2 }\psi }{ { \partial z }^{ 2 } } +\frac { { 2m } }{ { h }^{ 2 } } (E-V)\Psi =0\)
All of these
22.
Identify the correct statement(s) with respect to the following reaction :
Zn + 2HCl \(\longrightarrow\) ZnCl2 + H2
(i) Zinc is acting as an oxidant
(ii) Chlorine is acting as a reductant
(iii) Hydrogen is not acting as an oxidant
(iv) Zn is acting as a reductant
only (ii)
only (iv)
both (ii) and (iii)
both (ii) and (i)
23.
Total number of electrons present in 1.7 g of ammonia is _____.
6.022\(\times\)1023
\(\frac { 6.022\times { 10 }^{ 22 } }{ 1.7 } \quad \)
\(\frac { 6.022\times { 10 }^{ 24 } }{ 1.7 } \)
\(\frac { 6.022\times { 10 }^{ 23 } }{ 1.7 } \)
24.
For d-electron, the orbital angular momentum is ___________
\(\frac { \sqrt { 2 } h }{ 2\pi } \)
\(\\ \frac { \sqrt { 2h } }{ 2\pi } \)
\(\frac { \sqrt { 2\times 4 } h }{ 2\pi } \)
\(\frac { \sqrt { 6 } h }{ 2\pi } \)
25.
Assertion(A): Cr with electronic configuration [Ar] 3d5 4s1 is more stable than [Ar] 3d4 4s2.
Reason(R): Half filled orbitals have been found to have extra stability than partially filled orbitals.
Codes:
(a) A and R are correct and R is the correct explanation of A.
(b) A and R are correct but R is not the correct explanation of A.
(c) A is correct but R is wrong.
(d) A is wrong but R is correct.
A and R are correct but R is not the correct the explanation of A.
A is correct but R is wrong.
A is wrong but R is correct.
A is wrong but R is correct.
1.
(a)
Amongst the isoelectronic species, smaller the positive charge on cation, smaller is the ionic radius
2.
(d)
Fluoromethane
3.
(a)
4.
(c)
s, px, py, pz, dx2-y2
5.
(a)
8/3
6.
(a)
-2oC
7.
(d)
2.5 x 10-4
8.
(c)
more PCl5 will be produced
9.
(b)
+4
10.
(c)
23 g
11.
(b)
1s2 2s2 2p6 3s2 3p6 3d5 4s1
12.
(a)
i and ii
13.
(c)
C and CO
14.
(d)
Water
15.
(b)
6C12
16.
(b)
Cl < P < Mg < Ca
17.
(b)
endothermic
18.
(b)
O-(g) +e- ⟶ O2-
19.
(a)
increases
20.
(a)
Due to their less ionisation energy
21.
(a)
\(\overset { \wedge }{ H } \psi =E\psi \)
22.
(b)
only (iv)
23.
(a)
6.022\(\times\)1023
24.
(d)
\(\frac { \sqrt { 6 } h }{ 2\pi } \)
25.
(a) A and R are correct and R is the correct explanation of A.
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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