11th Standard Syllabus & Materials
11th Standard
Tamilnadu 11th Standard Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil கேடில் விழுச்செல்வம் - உரைநடை - தமிழகக் கல்வி வரலாறு Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set B
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set B
Published on: 10/11/2020
11th Standard Chemistry Chemical bonding English Medium Free Online Test One Mark Questions 2020 - 2021
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.
Questions + Answers key
Take MCQ Chemistry Test
1.
The hybrididsation of S in SO2 is __________
sp
Sp2
sp3
None of these
2.
Identify the incorrect statement with respect to hybridisation.
Hybridisation is intermixing of orbitals of nearly equal energies.
Shape of molecule depends upon type of hybridisation only.
Hybrid orbitals are identical in all aspects.
Hybrid orbitals can form \(\sigma\) and \(\pi\) bond
3.
Statement I: N2, CO and CN- are having same bond order.
Statement II : Isoelectronic species always have same bond order.
Both statement I and II are true and statement II explains statement I.
Both statement I and II are true but statement I does not explain statement II.
Statement I is true, but statement II is false
Both-statement I and II are false
4.
Which of the following statements are correct with respect to bond order?
(i) Bond order of N2 is 3.5
(ii) Bondorder of O2 is 2
(iii) Bond order of NO+ is 3.0
(iv) Bond order of NO is 2.5
Only (i)
(i), (ii), (iv)
(ii), (iii), (iv)
(i), (ii), (iii), (iv).
5.
H2O is polar, whereas BeF2 is not It is because ___________
The electronegativity of F is greater than that of O.
H2O involves hydrogen bonding whereas BeF2 is a discrete molecule
H2O is linear and BeF2 is angular
H2O is angular and BeF2 is linear
6.
The correct order of increasing bond angles in the following triatomic species is ____________
\({ NO }_{ 2 }^{ + }\)< NO2 <\({ NO }_{ 2 }^{ - }\)
\({ NO }_{ 2 }^{ - }\)< NO2 <\({ NO }_{ 2 }^{ + }\)
\({ NO }_{ 2 }^{ - }\)<\({ NO }_{ 2 }^{ + }\)< NO2
\({ NO }_{ 2 }^{ + }\)< \({ NO }_{ 2 }^{ - }\)
7.
Which compound has planar structure?
XeF4
XeOF2
XeO2F2
XeO4
8.
The formula of the compound is A2B3. The number of electrons in the outermost orbits of A and B respectively are ________
3 and 6
3 and 2
2 and 3
5 and 2
9.
The correct sequence of increasing covalent character is __________
LiCl < NaCl
NaCl < LiCl < BeCl2
BeCl2
10.
Pick out the molecule having double bond.
O2
N2
He2
H2
11.
Calculate the formal charge on C-atom in carbonate ion.
-1
0
+1
+2
12.
Which among the following molecule obeys octet rule?
NO
NO2
N2O3
ClO2
13.
Which of the following molecule has no dative bond?
CO
\({ SO }_{ 4 }^{ 2- }\)
\({ CO }_{ 3 }^{ 2- }\)
None of these
14.
Pick out the incorrect statement from the following.
Sp3 hybrid orbitals are equivalent and are at an angle of 109o 28' with each other
dsp2 hybrid orbitals are equivalent and bond angle between any two of them is 90o
All five sp3d hybrid orbitals are not equivalent out of these five sp3d hybrid orbitals, three are at an angle of 120o, remainir two are perpendicular to the plane containing the other three
none of these
15.
Bond order of a species is 2.5 and the number of electons in its bonding molecular orbital is formd to be 8 The no. of electons in its antibonding molecular orbital __________
three
four
Zero
cannot be calculated form the given unformation
16.
The correct order of O-O bond length in hydrogen peroxide, ozone and oxygen is _______
H2O2 > O3 >O2
O2 > O3 > H2O2
O2 > H2O2 > O3
O3 > O2 > H2O2
17.
Which of these represents the correct order of their increasing bond order _________
C2 < C2 2- < O2 2- < O2
C 2 2- < C2 + < O2 < O2 2-
O2 2- < O2 < C2 2- < C 2+
O2 2- < C2 + < O2 < C2 2-
18.
In ClF3, NF3 and BF3 molecules the chlorine, nitrogen and boron atoms are ______
sp3 hybridised
sp3 ,sp3 and sp2 respectively
sp2 hybridised
sp3d, sp3 and sp hybridised respectively
19.
In which of the following Compounds does the central atom obey the octet rule ?
XeF4
AlCl3
SF6
SCl2
20.
Assertion: Oxygen molecule is paramagnetic.
Reason: It has two unpaired electron in its bonding molecular orbital.
a) both assertion and reason are true and reason is the correct explanation of assertion
b) both assertion and reason are true but reason is not the correct explanation of assertion
c) assertion is true but reason is false
d) Both assertion and reason are false
both assertion and reason are true and reason is the correct explanation of assertion
both assertion and reason are true but reason is not the correct explanation of assertion
assertion is true but reason is false
Both assertion and reason are false
1.
(d)
None of these
2.
(d)
Hybrid orbitals can form \(\sigma\) and \(\pi\) bond
3.
(a)
Both statement I and II are true and statement II explains statement I.
4.
(c)
(ii), (iii), (iv)
5.
(c)
H2O is linear and BeF2 is angular
6.
(b)
\({ NO }_{ 2 }^{ - }\)< NO2 <\({ NO }_{ 2 }^{ + }\)
7.
(a)
XeF4
8.
(a)
3 and 6
9.
(b)
NaCl < LiCl < BeCl2
10.
(a)
O2
11.
(b)
0
12.
(c)
N2O3
13.
(c)
\({ CO }_{ 3 }^{ 2- }\)
14.
(c)
All five sp3d hybrid orbitals are not equivalent out of these five sp3d hybrid orbitals, three are at an angle of 120o, remainir two are perpendicular to the plane containing the other three
15.
(a)
three
16.
(b)
O2 > O3 > H2O2
17.
(d)
O2 2- < C2 + < O2 < C2 2-
18.
(d)
sp3d, sp3 and sp hybridised respectively
19.
(d)
SCl2
20.
c) assertion is true but reason is false
11th Standard Syllabus & Materials
11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set B
NEW11th Standard
Tamilnadu 11th Standard Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
Tamilnadu 11th Standard Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set B
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