11th Standard Syllabus & Materials
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TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A
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TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A
Published on: 10/11/2020
11th Standard Chemistry Solutions English Medium Free Online Test One Mark Questions with Answer Key 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.
Which of the following is not a colligative property?
optical activity
osmotic pressure
elevation boiling point
depression in freezing point
2.
What would be the value of van't Hoff factor for a dilute solution of K2SO4 in water __________
3
2
1
4
3.
Statement I: Acetic acid deviates from ideal behaviour.
Statement II: Acetic acid exists as a dimer by forming inter molecular hydrogen bonds and hence deviates from Raoult's law.
Statement I& II are correct and II is the correct explanation of I.
Statement I& II are correct but II is not the correct explanation of I.
Statement I is true but II is wrong.
Statement I is wrong but II is correct.
4.
Which of the following is not an non-ideal solution showing negative deviation?
Phenol and aniline
Ethanol and water
Acetone + Chloroform
n-Heptane and n-Hexane
5.
Statement I: The dissolution of ammonium nitrate increases steeply with increase III temperature.
Statement II: The dissolution process of ammonium nitrate is endothermic in nature.
Statement I and II are correct and statement II is the correct explanation of statement I.
Statement I and II are correct but II is not the correct explanation of I.
Statement I is correct but II is wrong
Statement I is wrong but II is correct. .
6.
Which one of the following is a homogeneous mixture?
Sea water
Air
Alloys
All the above
7.
Which of the following concentration terms is temperature independent?
I) Molarity
II) Molality
III) Normality
IV) Mole fraction
I& II
I & III
II only
II & IV
8.
The relationship between the values of osmotic pressure of 0.1 M solutions. of KNO3 (P1) and CH3COOH(P2) is ___________
P1 > P2
P2 > P1
P1 = P2
\(\frac { { P }_{ 1 } }{ { P }_{ 1 }+{ P }_{ 2 } } =\frac { { P }_{ 2 } }{ { P }_{ 1 }+2{ P }_{ 2 } } \)
9.
Which of the following physical properties is used to determine, the molecular mass of a polymer solution?
Relative lowering of vapour pressure
Elevation in boiling point
Depression in freezing point
Osmotic pressure
10.
A pressure cooker reduces cooking time for food because ___________
Cooking involves chemical changes helped by a rise in temperature
Heat is more evenly distributed in the cooking space
Boiling point of water involved in cooking is increased
The higher pressure inside the cooker crushes the food material
11.
Which of the following is correct about a solution showing positive deviation?
Vapour pressure observed will be the less than that calculated from Raoult's law
Minimum boiling azeotrope will be formed
\(\triangle\)Hmix < 0
\(\triangle\)Vmix < 0
12.
The highest temperature at which vapour pressure of any liquid can be measured is __________
Critical temperature
Boyle's temperature
Boiling point of the liquid
Kraft temperature
13.
Correct statement among the following regarding osmosis is ______________
Solvent flows from high concentration of solute to low concentration of solute
Solvent flows from low concentration of solute to high concentration of solute
Solute flows from high concentration to low concentration
Solute flows from low concentration to high concentration
14.
In a binary solution __________
solvent may be liquid
solvent may be solid
solute may be gas
any of these
15.
Which of the following gas should have maximum value for kH?
He
H2
N2
CO2
16.
200ml of an aqueous solution of a protein contains 1.26g of protein. At 300K, the osmotic pressure of this solution is found to be 2.52 x 10–3 bar. The molar mass of protein will be (R = 0.083 L bar mol–1 K–1)_______________
62.22 Kg mol-1
12444 g mol-1
300 g mol-1
none of these
17.
P1 and P2 are the vapour pressures of pure liquid components, 1 and 2 respectively of an ideal binary solution if x1 represents the mole fraction of component 1, the total pressure of the solution formed by 1 and 2 will be ____________
P1 + x1 (P2 – P1)
P2 – x1 (P2 + P1)
P1 – x2 (P1 – P2)
P1 + x2 (P1 – P2)
18.
Which one of the following is incorrect for ideal solution ?
\(\Delta H_{mix}=0\)
\(\Delta U_{mix}=0\)
\(\Delta P=P_{observed}-P_{calculated\ by\ raoults\ law}=0\)
\(\Delta G_{mix}=0\)
19.
The partial pressure of nitrogen in air is 0.76 atm and its Henry's law constant is 7.6 x 104 atm at 300K. What is the mole fraction of nitrogen gas in the solution obtained when air is bubbled through water at 300K ?
1 x 10-4
1 x 10-6
2 x 10-5
1 x 10-5
20.
Assertion: An ideal solution obeys Raoults Law
Reason: In an ideal solution, solvent-solvent, as well as solute-solute interactions, are similar to solute-solvent interactions.
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.
(a)
optical activity
2.
(a)
3
3.
(a)
Statement I& II are correct and II is the correct explanation of I.
4.
(d)
n-Heptane and n-Hexane
5.
(a)
Statement I and II are correct and statement II is the correct explanation of statement I.
6.
(a)
Sea water
7.
(d)
II & IV
8.
(a)
P1 > P2
9.
(d)
Osmotic pressure
10.
(c)
Boiling point of water involved in cooking is increased
11.
(b)
Minimum boiling azeotrope will be formed
12.
(c)
Boiling point of the liquid
13.
(b)
Solvent flows from low concentration of solute to high concentration of solute
14.
(d)
any of these
15.
(a)
He
16.
(a)
62.22 Kg mol-1
17.
(c)
P1 – x2 (P1 – P2)
18.
(d)
\(\Delta G_{mix}=0\)
19.
(d)
1 x 10-5
20.
both assertion and reason are true and reason is the correct explanation of assertion
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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