11th Standard Syllabus & Materials
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Published on: 10/11/2020
11th Standard Chemistry English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Three
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 most easily hydrolysed molecule under SN1 condition is ___________
allyl chloride
ethyl chloride
ispropylchloride
benzyl chloride
2.
Ortho and para-nitro phenol can be separated by _________
azeotropic distillation
destructive distillation
steam distillation
cannot be separated
3.
The IUPAC name of the compound CH3 – CH = CH – C ≡ CH is _________
Pent - 4 - yn-2-ene
Pent -3-en-l-yne
pent – 2– en – 4 – yne
Pent – 1 – yn –3 –ene
4.
According to VSEPR theory, the repulsion between different parts of electrons obey the order.
l.p – l.p > b.p – b.p > l.p – b.p
b.p–b.p> b.p–l.p> l.p–b.p
l.p–l.p> b.p–l.p > b.p–b.p
b.p–b.p> l.p–l.p> b.p–l.p
5.
The first ionization enthalpy of Na, Mg, AI and Si are in order __________
Na
Na>Mg>AI>Si
Na
Na>Mg>Al
6.
Which of the following is arranged in order of increasing radius?
K+ (aq) < Na+ (aq) < Li+ (aq)
K+ (aq) > Na+ (aq) > Zn+ (aq)
K+ (aq) > Li+ (aq) > Na+ (aq)
Li+ (aq) < Na+ (aq) < K+ (aq)
7.
Which of the following statements related to the modern periodic table is incorrect?
The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-subshell.
The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.
Each block contairis a number of columns equal to the number of electrons that can occupy that subshell.
The block indicates value of azimuthal quantum number (1) for the last subshell that received electrons in building up the electronic configuration.
8.
Which of the following have the highest value of electronegativity?
Halogens
Alkali metals
Alkaline earth metals
Transition metals
9.
Which one of the following is not an isoelectronic ion?
Na+
Mg2+
Cl-
O2-
10.
Which one of the following is in solid state at room temperature?
Bromine
Mercury
Bismuth
Gallium
11.
Consider the following statements.
(i) Oxidation character increases from left to right in a period.
(ii) Reducing character increases from left to right in a period.
(iii) Metallic character increases from left to right in a period.
Which of the above statement is/are not correct?
(i) only
(i) and (ii)
(ii) and (iii)
(i),(ii),(iii)
12.
The general electronic configuration of alkali metals is ____________
[noble gas] ns2
[noble gas] ns1
ns2 np6
ns2 (n-1)d1-10
13.
Which of the following is named as perhydrol and used as an antiseptic?
D2O
H2O2
NaH
B2H6
14.
Which one of the following does not have intramolecular hydrogen bonding?
water
o-nitrophenol
Salicylaldehyde
Salicylic acid
15.
Which one of the following is the first transition series?
Sc
Zn
Ti
Cu
16.
Which one of the following element mostly present in the sun and the stars?
Hydrogen
Lithium
Helium
Beryllium
17.
Which one of the following is the standard for atomic mass?
1H1
6C12
6C14
8O16
18.
When sodium peroxide is treated with dilute sulphuric acid the products are _____________
sodium sulphate and water
sodium sulphate and oxygen
sodium sulphate, hydrogen and oxygen
sodium sulphate and hydrogen peroxide
19.
CO2 + K2CO3 + H2O \(\rightarrow\) X. The product X is ______________
KHCO3
CO2
H2CO3
KOH
20.
The element which does not contain a neutron is _____________
hydrogen
helium
chlorine
none of the above
21.
Which of the following statements are correct?
(i) Helium has the highest first ionisation enthalpy
(ii) Chlorine has less electron affinity than fluorine
(iii) Ne has more ionisation energy than Boron.
(iv) The ionisation energy of noble gases is zero
(i), (ii) and (iii)
(i) and (iii)
(i), (iii) and (iv)
(i), (ii), (iii) and (iv)
22.
The reaction H2O2 ➝ H2O + O2 represents, ____________.
Oxidation of H2O2
reduction of H2O
disproportionation of oxygen
acidic nature of H2O2
23.
H2O2 is a ________ acid.
monobasic
dibasic
tribasic
none
24.
Consider the following statements
1. \(\lambda\) = h / mv is valid only when the particle travels at speed much less than the speed of light.
2. Einstein's mass-energy relationship is E = mc2
3. The angular momentum (mvr) ofthe electron must be equal to an integral multiple of h/4\(\pi\) . Which of the following statements) given above is/ are correct?
1&3
Only 1
1 & 2
1, 2 & 3
25.
Assertion: Helium has the highest value of ionization energy among all the elements known
Reason: Helium has the highest value of electron affinity among all the elements known.
Codes:
(a) Both assertion and reason are true and reason is correct explanation for the assertion.
(b) Both assertion and reason are true but the reason is not the correct explanation for the assertion
(c) Assertion is true and the reason is false
(d) Both assertion and the reason are false
Both assertion and reason are true and reason is correct explanation for the assertion.
Both assertion and reason are true but the reason is not the correct explanation for the assertion
Assertion is true and the reason is false
Both assertion and the reason are false
1.
(d)
benzyl chloride
2.
(c)
steam distillation
3.
(b)
Pent -3-en-l-yne
4.
(c)
l.p–l.p> b.p–l.p > b.p–b.p
5.
(b)
Na>Mg>AI>Si
6.
(d)
Li+ (aq) < Na+ (aq) < K+ (aq)
7.
(b)
The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.
8.
(a)
Halogens
9.
(c)
Cl-
10.
(c)
Bismuth
11.
(b)
(i) and (ii)
12.
(c)
ns2 np6
13.
(b)
H2O2
14.
(a)
water
15.
(a)
Sc
16.
(a)
Hydrogen
17.
(b)
6C12
18.
(d)
sodium sulphate and hydrogen peroxide
19.
(b)
CO2
20.
(a)
hydrogen
21.
(b)
(i) and (iii)
22.
(c)
disproportionation of oxygen
23.
(b)
dibasic
24.
(c)
1 & 2
25.
(c) Assertion is true and the reason is false
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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