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Published on: 23/08/2019
Basic Concepts of Chemistry and Chemical Calculations
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.
On the reaction 2Ag + H2SO4 \(\rightarrow\) Ag2SO4 + 2H2O + SO2.Sulphuric acid acts as ____________.
oxidising agent
reducing agent
a catalyst
an acid as well as an oxidant
2.
Which of the following is the most powerful oxidising agent?
KMnO4
K2Cr2O7
O3
H2O2
3.
Which of the following halogens do not exhibit positive oxidation number in its compounds?
Fluorine
Chlorine
Iodine
Bromine
4.
The mass of an atom of nitrogen is _______________.
\(\frac { 14 }{ 6.023\times { 10 }^{ 23 } } \)
\(\frac { 28 }{ 6.023\times { 10 }^{ 23 } } \)
\(\frac { 1 }{ 6.023\times { 10 }^{ 23 } } \)
14 amu
5.
Which of the following has the highest mass?
1 g atom of C
1/2 mole of CH4
10 ml of water
3.011 x 1023 atoms of oxygen
6.
The equivalent mass of potassium permanganate in alkaline medium is:
MnO4- + 2H2O + 3e-\(\rightarrow\) MnO2 + 4OH-
31.6
52.7
79
None of these
7.
Calculate the percentage of N in ammonia molecule.
121.42%
28.35%
82.35%
28.53%
8.
Atomicity of nitrogen is __________.
1
2
3
Zero
9.
Which form of based on physical characteristics possess neither definite volume nor definite shape?
Solids
Liquids
Gases
Both (a) and (b)
10.
The solid state of matter is converted into gas by
sublimation
deposition
freezing
condensation
11.
In which of the following reactions, hydrogen peroxide acts as an oxidising agent?
I2+ H2O2 + 20H- \(\longrightarrow\) 21- + 2H2O + O2
PbS + 4H2O2 \(\longrightarrow\) PbSO4 + 4H2O
2MnO4-+ 3H2O2 \(\longrightarrow\) 2MnO2 + 3O2 + 2H2O + 2OH-
HOCI + H2O2 \(\longrightarrow\) H2O+ + Cl- + O2
12.
Maximum oxidation state is present in the central metal atom of which compound
CrO2Cl2
MnO2
[Fe(CN)6]3-
MnO
13.
Which one of the following is used as a standard for atomic mass?
6C12
7C12
6C13
6C14
14.
Two 22.4 litre containers A and B contains 8 g of O2 and 8 g of SO2 respectively at 273 K and 1 atm pressure, then ______.
Number of molecules in A and B are same
Number of molecules in B is more than that in A.
The ratio between the number of molecules in A= to number of molecules in B is 2:1
Number of molecules in B is three times greater than the number of molecules in A
15.
Rusting of iron articles is an example of ___________ reaction
Combustion
decomposition
redox
hydrolysis
16.
Which one of the following represents 180 g of water ?
5 Moles of water
90 moles of water
\(\frac { 6.022\times { 10 }^{ 23 } }{ 180 } \) molecules of water
6.022\(\times\)1024molecules of water
17.
The oxidation number of hydrogen in LiH is _________
+1
-1
+2
-2
18.
Fe2 + \(\longrightarrow\) Fe3+ + e- is a ________ reaction.
redox
reduction
oxidation
decomposition
19.
The number of water molecules in a drop of water weighing 0.018 g is ________.
6.022\(\times\)1026
6.022\(\times\)1023
6.022\(\times\)1020
9.9 \(\times\)1022
20.
40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left after cooling to room temperature is _______.
40 ml CO2 gas
40 ml CO2 gas and 80 ml H2O gas
60 ml CO2 gas and 60 ml H2O gas
120 ml CO2 gas
1.
(d)
an acid as well as an oxidant
2.
(a)
KMnO4
3.
(a)
Fluorine
4.
(a)
\(\frac { 14 }{ 6.023\times { 10 }^{ 23 } } \)
5.
(a)
1 g atom of C
6.
(b)
52.7
7.
(c)
82.35%
8.
(b)
2
9.
(c)
Gases
10.
(a)
sublimation
11.
(b)
PbS + 4H2O2 \(\longrightarrow\) PbSO4 + 4H2O
12.
(a)
CrO2Cl2
13.
(a)
6C12
14.
(c)
The ratio between the number of molecules in A= to number of molecules in B is 2:1
15.
(c)
redox
16.
(d)
6.022\(\times\)1024molecules of water
17.
(b)
-1
18.
(c)
oxidation
19.
(c)
6.022\(\times\)1020
20.
(a)
40 ml CO2 gas
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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