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Solutions - ISC Class 12 Chemistry Questions with Answers

75 past-paper questions on Solutions from ISC Class 12 Chemistry papers (2027-2018), newest first. Open one to see its answer.

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The correct order of freezing point of $0\cdot5\text{ M}$ solution of urea, $\text{AlCl}_3$, $\text{KCl}$ and $\text{MgCl}_2$ is: 2027 · 1 mark · MCQ
Answer the following: Arrange the following aqueous solutions in increasing order of osmotic pressure. Give reasons in support of… 2027 · 5 marks · Numerical
Answer the following: $300\text{ ml}$ of aqueous solution of protein contains $1\cdot85\text{ g}$ of protein, the osmotic… 2027 · 5 marks · Numerical
The students of Class XII were on a study trip. They visited a nearby lake and took some water samples which were rich in sodium… 2027 · 2 marks · Numerical
Choose the appropriate word(s) from the bracket [first, zero, second, Raoult’s law, non-ideal, addition, substitution, Henry’s… 2026 · 1 mark · Fill in
Choose the appropriate word(s) from the bracket [first, alc. AgCN, primary, decrease, third, increase, zero, Lucas, alc. KCN… 2026 · 1 mark · Fill in
Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [electrophilic, four, 4-bromophenol… 2026 · 1 mark · Fill in
An aqueous solution containing $1\cdot25\text{ g}$ $\text{BaCl}_2$ (molecular mass $208\cdot34\text{ g mol}^{-1}$) in… 2026 · 5 marks · Short answer
The depression of freezing point of $0\cdot1$ molal aqueous solution of $\text{MgCl}_2$ is less than that of $0\cdot1$ molal… 2026 · 1 mark · Assertion-reason
$0\cdot1\text{ M}$ sucrose solution has higher depression in the freezing point than $0\cdot1\text{ M}$ urea solution. Given… 2026 · 1 mark · Assertion-reason
Answer the following: Calculate the mass of ascorbic acid (molecular mass $= 176\text{ g mol}^{-1}$) to be dissolved in… 2026 · 5 marks · Numerical
Osmotic pressure of $0\cdot5\text{ molar}$ $\text{KCl}$ solution is more than that of $0\cdot5\text{ molar}$ urea solution. 2026 · 1 mark · Assertion-reason
An aqueous solution contains $0\cdot63\text{ g}$ of protein in $300\text{ cm}^3$ of water. The osmotic pressure of the solution… 2026 · 5 marks · Long answer
Answer the following: $0\cdot680\text{ g}$ of a compound is dissolved in $15\cdot0\text{ g}$ of benzene and the freezing point of… 2026 · 2 marks · Numerical
During an experiment, a scientist tried to determine the molecular mass of a protein by applying elevation of boiling point… 2026 · 2 marks · Short answer
When $2\text{ g}$ of benzoic acid ($\text{C}_6\text{H}_5\text{COOH}$) is dissolved in $25\text{ g}$ of benzene, it shows a… 2026 · 2 marks · Numerical
The pressure exerted by the vapour of a liquid at a particular temperature is known as the vapour pressure of the liquid at that… 2025 · 5 marks · Short answer
Answer the following: What is the significance of Van’t Hoff factor? Devise the relationship between Van’t Hoff factor and degree… 2025 · 2 marks · Short answer
The concept of Osmosis is frequently used in medical field. On the other hand, reverse osmosis has also found application in… 2025 · 3 marks · Short answer
The molar mass calculated through colligative properties is sometimes different from that of experimentally determined molecular… 2025 · 3 marks · Short answer
The scientist van’t Hoff introduced a factor ($i$) to account for the extent of association or dissociation of solutes. It is… 2025 · 3 marks · Short answer
2.517 g of Naphthalene is dissolved in 150 g $\text{CS}_2$, the solution boils at 319.70 K. The boiling point of $\text{CS}_2$ is… 2025 · 2 marks · Numerical
During a study trip, students visited a lake and took out water sample which was rich in potassium chloride salt. They performed… 2025 · 3 marks · Numerical
Depression in freezing point is a colligative property. At the same concentration in aqueous solution, select the solution that… 2025 · 1 mark · MCQ
Answer the following questions: A solution of an organic compound is prepared by dissolving $34\cdot2\text{ g}$ of solute in… 2025 · 5 marks · Short answer
Osmosis and osmotic pressure play a very significant role in biological processes. The osmotic pressure of human blood is… 2025 · 5 marks · Short answer
Which one of the following statements are correct regarding the depression of freezing point? (P) The depression in freezing… 2025 · 1 mark · MCQ
Water phase change in soil causes severe damage to roads, canals, airport runways and other buildings. The freezing point is an… 2025 · 5 marks · Case based
The Van't Hoff factor for aqueous acetic acid is ____ than one while that of acetic acid in benzene is ____ than one. 2025 · 1 mark · Fill in
When the molality of the dilute solution is multiplied by four, what will be the resulting effect on the molal depression… 2025 · 1 mark · MCQ
Vapour pressure plays an important role in calculating boiling point and the freezing point of solutions. In cold countries salt… 2025 · 3 marks · Short answer
The osmotic pressure of a solution: (P) increases with an increase in number of moles of solute. (Q) decreases with an increase… 2025 · 1 mark · MCQ
If Sodium nitrate is completely dissociated into cations and anions in aqueous solution, the change in freezing point of water… 2025 · 1 mark · MCQ
Colligative properties of a solution are: (P) Independent of the nature of solute (Q) Proportional to molecular mass of solute… 2025 · 1 mark · MCQ
Answer the following: Calculate the boiling point of urea solution when $8\cdot0\text{ g}$ of urea is dissolved in $250\text{ g}$… 2025 · 5 marks · Short answer
Osmotic pressure is the external pressure which should be applied to stop the flow of solvent into the solution when the two are… 2025 · 5 marks · Short answer
A student X was doing an experiment by taking 0.15 g acetic acid in 40 g of benzene. He suddenly observed that the freezing point… 2025 · 3 marks · Numerical
50 mg of $\text{Na}_2\text{SO}_4$ is dissolved in 3 litres of water at $27^\circ\text{C}$. What would be the osmotic pressure for… 2025 · 3 marks · Numerical
The colligative properties are properties of solutions which depend only upon the number of solute particles irrespective of… 2025 · 3 marks · Short answer
Observe the following diagram and answer the questions that follows: In which direction, the flow of solvent will take place… 2025 · 2 marks · Short answer
Answer the following questions: An aqueous solution is made by dissolving $10\text{ g}$ of glucose… 2025 · 5 marks · Short answer
During the winter season in a particular year, Kashmir experienced heavy snowfall. It was an unexpected snowfall. Thousands of… 2024 · 3 marks · Case based
If $200\text{ cm}^3$ of an aqueous solution of a protein contains $1\cdot26\text{ g}$ of protein, the osmotic pressure of the… 2024 · 2 marks · Numerical
Water vapour and liquid water are in equilibrium in a container. At room temperature, the vapour pressure of water is… 2024 · 3 marks · Short answer
An aqueous solution containing $12\cdot50\text{ g}$ of barium chloride in $1000\text{ g}$ of water boils at… 2024 · 3 marks · Numerical
When two solutions are separated by a semi-permeable membrane, the solvent molecules move from a solution of lower molar… 2024 · 3 marks · Case based
An equimolar solution of non-volatile solutes A and B, shows a depression in freezing point in the ratio of $2:1$. If A remains… 2024 · 1 mark · MCQ
John was making noodles in boiling water. When he added common salt ($\text{NaCl}$) to boiling water, the water stopped boiling… 2024 · 2 marks · Numerical
Which of the following aqueous solution has lowest vapour pressure? 2024 · 1 mark · MCQ
Calculate the mass of ascorbic acid (molecular mass $= 176\text{ g/mol}$) that should be dissolved in $155\text{ g}$ of acetic… 2023 · 2 marks · Numerical
The osmotic pressure of blood at $37^\circ\text{C}$ is $8\cdot21\text{ atm}$. How much glucose in grams should be used per litre… 2023 · 2 marks · Numerical
When $2\text{ g}$ of benzoic acid is dissolved in $25\text{ g}$ of benzene, it shows a depression in freezing point equal to… 2023 · 3 marks · Numerical
A solution of urea in water has boiling point $100\cdot128^\circ\text{C}$. Calculate the freezing point of the same solution… 2023 · 2 marks · Numerical
The osmotic pressure of $20\text{ g}$ haemoglobin in $500\text{ ml}$ of solution is $0\cdot016\text{ atm}$ at $25^\circ\text{C}$… 2023 · 2 marks · Numerical
Match the following: 2023 · 4 marks · Match
An aqueous solution containing $12\cdot48\text{ g}$ of barium chloride in $1000\text{ g}$ of water boils at… 2023 · 3 marks · Numerical
A binary solution contains 92 g ethyl alcohol and 72 g water. (Atomic weight of C = 12, H =1, O =16) Mole fraction of ethyl… 2022 · 2 marks · Short answer
An aqueous solution containing one gram of urea (molecular weight = 60) boils at 100.25oC. The same solution freezes at -0.894… 2022 · 2 marks · Short answer
If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of solute is: 2022 · 1 mark · MCQ
Solutions which distil without any change in composition and temperature are called: 2022 · 1 mark · MCQ
Colligative properties depend on: 2022 · 1 mark · MCQ
A solution of sucrose (molecular weight 342 g mol-1) has been prepared by dissolving 68.4 g of sucrose in 1000 g of water. (Kf… 2022 · 2 marks · Short answer
If molality of the dilute solution of a non-volatile, non-dissociating and non-associating electrolyte is doubled, the value of… 2022 · 1 mark · MCQ
An aqueous solution of a non-volatile solute freezes at $272\cdot4\text{ K}$, while pure water freezes at $273\cdot0\text{ K}$… 2020 · 5 marks · Short answer
The elevation in boiling point when $0\cdot30\text{ g}$ of acetic acid is dissolved in $100\text{ g}$ of benzene is… 2020 · 5 marks · Short answer
Select the correct alternative from the choices given: (i) The cell reaction is spontaneous or feasible when emf of the cell is… 2019 · 4 marks · Short answer
Match the following: 2019 · 4 marks · Match
Answer the following questions: (i) (1) Which trivalent ion has maximum size in the Lanthanoid series i.e. Lanthanum ion… 2019 · 8 marks · Short answer
When $0\cdot4\text{ g}$ of oxalic acetic acid is dissolved in $40\text{ g}$ of benzene, the freezing point of the solution is… 2019 · 3 marks · Numerical
A solution is prepared by dissolving $9\cdot25\text{ g}$ of non-volatile solute in $450\text{ ml}$ of water. It has an osmotic… 2019 · 3 marks · Numerical
Fill in the blanks by choosing the appropriate word/words from those given in the brackets: (more than, primary, cathode, Lucas… 2019 · 4 marks · Fill in
An aqueous solution containing $12\cdot48\text{ g}$ of barium chloride ($\text{BaCl}_2$) in $1000\text{ g}$ of water, boils at… 2018 · 3 marks · Numerical
A solution containing $0\cdot5\text{ g}$ of $\text{KCl}$ dissolves in $100\text{ g}$ of water and freezes at… 2018 · 3 marks · Numerical
The freezing point of a solution containing $5\cdot85\text{ g}$ of $\text{NaCl}$ in $100\text{ g}$ of water is… 2018 · 3 marks · Numerical
Calculate the amount of $\text{CaCl}_2$ (molar mass = $111\text{ g mol}^{-1}$) which must be added to $500\text{ g}$ of water to… 2018 · 3 marks · Numerical

Solutions - ISC Class 12 Chemistry Questions with Answers

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