Q.Match the items given in Column I and Column II.
Column I:

The key idea involves understanding the definitions of different types of solutions based on their composition and colligative properties.

1. A saturated solution contains the maximum amount of solute dissolvable at a given temperature, matching (d).
2. A binary solution is composed of exactly two components, matching (c).
3. Isotonic solutions have the same osmotic pressure at a given temperature, matching (a).
4. A hypotonic solution has an osmotic pressure less than that of another solution, matching (b). …

Solutions are homogeneous mixtures of two or more components. We classify them based on various criteria, such as the amount of solute dissolved, the number of components, the physical state of the components, and colligative properties like osmotic pressure. Understanding these classifications is fundamental to comprehending solution chemistry.

Let's match each term from Column I with its appropriate definition from Column II.

1. Saturated solution

   A saturated solution is one that contains the maximum amount of solute that can be dissolved in a given amount of solvent at a specific temperature and pressure. Any additional solute added to a saturated solution at that temperature will not dissolve and will typically precipitate out.

   This definition directly matches with (d) A solution which contains maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature.

2. Binary solution

   The term "binary" refers to "two." A binary solution is the simplest type of solution, consisting of only two components: one solute and one solvent. For example, sugar dissolved in water is a binary solution.

   This definition matches with (c) Solution with two components.

3. Isotonic solution

   Isotonic solutions are those that have the same osmotic pressure at a given temperature. When two isotonic solutions are separated by a semi-permeable membrane, there is no net movement of solvent across the membrane because the tendency for solvent to move in one direction is balanced by the tendency to move in the other.

   This definition matches with (a) Solution having same osmotic pressure at a given temperature as that of given solution.

   Important

   Osmotic pressure ($\Pi$) is a colligative property, meaning it depends only on the number of solute particles, not their identity. For dilute solutions, it is given by the van't Hoff equation: $\Pi = iCRT$, where $i$ is the van't Hoff factor, $C$ is the molar concentration, $R$ is the ideal gas constant, and $T$ is the absolute temperature.

4. Hypotonic solution …

Here is the matching method for this question, followed by the correct answer.

Method: Definition-Based Matching

This method relies on knowing the exact definition of each term in Column I and then finding the phrase in Column II that matches it word-for-word or concept-for-concept.

Steps:

1. Recall the definition of the first term in Column I.
2. Scan Column II for the phrase that matches that definition exactly.
3. Match and eliminate — once a match is made, cross out both items to avoid confusion.
4. Repeat for all remaining terms.

Applying the Method

Step 1: Saturated solution

• Definition: A solution that contains the maximum amount of solute that can dissolve in a given amount of solvent at a given temperature.
• Match: (d)
• Result: (i) → (d)

Step 2: Binary solution

• Definition: A solution made of exactly two components (solute + solvent).
• Match: (c)
• Result: (ii) → (c)

Step 3: Isotonic solution

• Definition: Two solutions having the same osmotic pressure at a given temperature.
• Match: (a)
• Result: (iii) → (a)

Step 4: Hypotonic solution

• Definition: A solution whose osmotic pressure is less than that of another solution.
• Match: (b)
• Result: (iv) → (b)

Step 5: Solid solution

• Definition: A solution in which the solvent is in the solid phase (e.g., alloys).
• Match: (f)
• Result: (v) → (f)

Step 6: Hypertonic solution …

Here are the common mistakes students make when matching these terms, along with the concept-first reasoning to avoid each.

✗ Mistake 1: Confusing Isotonic with Hypotonic or Hypertonic

Why it happens:

All three terms involve osmotic pressure comparison, so students often mix up which is “same,” “less,” or “more.”

How to avoid:

Break the words down:

• Iso = same → Isotonic = same osmotic pressure → matches (a)
• Hypo = under/below → Hypotonic = lower osmotic pressure → matches (b)
• Hyper = over/above → Hypertonic = higher osmotic pressure → matches (e)

Key trick: Remember the prefix meaning — Iso-same, Hypo-low, Hyper-high.

✗ Mistake 2: Thinking Saturated solution means “concentrated” in a vague way

Why it happens:

Students often match “saturated” with “binary” or “solid solution” because they think of “full” or “solid.”

How to avoid:

Recall the definition:

A saturated solution contains the maximum solute that can dissolve at a given temperature.

That directly matches (d).

Key trick: The word “maximum” is the clue — only saturated solutions have that property.

✗ Mistake 3: Matching Binary solution with “two phases” instead of “two components”

Why it happens:

“Binary” sounds like “biphase” or “two parts,” so students sometimes think of solid-liquid mixtures.

How to avoid:

In chemistry, binary solution = two components (solute + solvent).

That matches (c).

Key trick: Binary = two components, not two phases.

✗ Mistake 4: Confusing Solid solution with “saturated” or “hypertonic”

Why it happens:

“Solid” makes students think of “solid in liquid” or “maximum solute.”

How to avoid:

A solid solution is a homogeneous mixture in the solid phase — e.g., alloys like brass. …