Evaluate the following statements for their correctness
A. The elevation in boiling point temperature of water will be same for $01 \,M \,NaCl$ and $01\, M$ urea
B. Azeotropic mixtures boil without change in their composition
C. Osmosis always takes place from hypertonic to hypotonic solution
D. The density of $32 \% H _2 SO _4$ solution having molarity $409\, M$ is approximately $126\, g mL ^{-1}$
E. A negatively charged sol is obtained when KI solution is added to silver nitrate solution
Choose the correct answer from the options given below :
Evaluate the following statements for their correctness
A. The elevation in boiling point temperature of water will be same for $01 \,M \,NaCl$ and $01\, M$ urea
B. Azeotropic mixtures boil without change in their composition
C. Osmosis always takes place from hypertonic to hypotonic solution
D. The density of $32 \% H _2 SO _4$ solution having molarity $409\, M$ is approximately $126\, g mL ^{-1}$
E. A negatively charged sol is obtained when KI solution is added to silver nitrate solution
Choose the correct answer from the options given below :
Show Hint
- B and D only
- B, D and E only
- A and C only
- A, B and D only
The Correct Option is A
Approach Solution - 1
(B) Azeotropic mixtures have same composition in both liquid and vapour phase.
(C) Osmosis always takes place from hypotonic to hypertonic solution.
(D)
(E) When solutions is added to solution, positively charged solution results due to adsorption of ions from dispersion medium
Positively charged
So , the correct option is (A) : B and D only
Approach Solution -2
- (A) The elevation in boiling point is dependent on the number of particles in the solution. \( \text{NaCl} \) dissociates into 2 ions, while urea doesn’t dissociate. Hence, the elevation in boiling point for NaCl would be higher than that for urea.
- (B) Azeotropic mixtures do boil at a constant composition, thus the statement is correct.
- (C) Osmosis always occurs from hypotonic to hypertonic solutions, so the statement is correct.
- (D) The given density and molarity of \( H_2SO_4 \) are correctly matched based on known data.
- (E) Adding KI to silver nitrate solution results in the formation of a positively charged sol (due to the formation of AgI), so this statement is incorrect.
Thus, the correct answer is option (1).
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Concepts Used:
Solutions
A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.
For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.
Types of Solutions:
The solutions can be classified into three types:
- Solid Solutions - In these solutions, the solvent is in a Solid-state.
- Liquid Solutions- In these solutions, the solvent is in a Liquid state.
- Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.
On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.