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Chemistry Question 66 – NEET-UG 2025

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Match List - I with List - II List-IList-II(Example)(Type of Solution)A) HumidityI) Solid in solidB) AlloysII) Liquid in gasC) AmalgamsIII) Solid in gasD) SmokeIV) Liquid in solid Choose the correct answer from the options given below :

Recall the different types of solutions or colloidal systems based on the physical states of the dispersed phase and dispersion medium.

Step 1: Classify each example based on its dispersed phase and dispersion medium✦ Active

Let's analyze the nature of each substance in List-I and match it to the appropriate type of solution/colloid in List-II:

A) Humidity: This refers to water vapor (liquid) dispersed in air (gas). Therefore, it is a 'Liquid in gas' system.

B) Alloys: These are homogeneous mixtures of two or more metals, where one metal (solid) is dissolved in another metal (solid). Therefore, it is a 'Solid in solid' solution.

C) Amalgams: These are alloys of mercury with another metal. Mercury is liquid at room temperature, and the other metal is typically solid. Thus, it is a 'Liquid in solid' solution.

D) Smoke: This consists of fine solid particles (e.g., carbon) dispersed in a gas (air). Therefore, it is a 'Solid in gas' colloidal system.

Step 2: Match List-I with List-II○ Expand

Based on the classifications from Step 1, we can establish the following matches:

A) Humidity → II) Liquid in gas

B) Alloys → I) Solid in solid

C) Amalgams → IV) Liquid in solid

D) Smoke → III) Solid in gas

💡 Teacher's Secret Hint

Remember that solutions and colloids are classified by the physical states of their components (solute/dispersed phase and solvent/dispersion medium).

Step 3: Select the correct option○ Expand

The correct matching sequence is A-II, B-I, C-IV, D-III. Comparing this with the given options:

Option (1): A-II, B-IV, C-I, D-III (Incorrect)

Option (2): A-II, B-I, C-IV, D-III (Correct)

Option (3): A-III, B-I, C-IV, D-II (Incorrect)

Option (4): A-III, B-II, C-I, D-IV (Incorrect)

Thus, option (2) is the correct answer.

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