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CBSE Class 9  >  Class 9 Test  >  Science New NCERT 2026-27 (New Syllabus)  >  Test: Exploring Mixtures and Their Separation - 2 - Class 9 MCQ

Exploring Mixtures and Their Separation - 2 - Free MCQ Practice Test


MCQ Practice Test & Solutions: Test: Exploring Mixtures and Their Separation - 2 (15 Questions)

You can prepare effectively for Class 9 Science Class 9 New NCERT 2026-27 (New Syllabus) with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Exploring Mixtures and Their Separation - 2". These 15 questions have been designed by the experts with the latest curriculum of Class 9 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 15 minutes
  • - Number of Questions: 15

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Test: Exploring Mixtures and Their Separation - 2 - Question 1
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Mustard oil and water are taken in a separating funnel. Which layer forms at the top?

Detailed Solution: Question 1

Mustard oil is less dense than water, so it forms the upper layer. Water, being denser, settles at the bottom.

Test: Exploring Mixtures and Their Separation - 2 - Question 2
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Sublimation is the process where a solid changes directly into:

Detailed Solution: Question 2

Sublimation is the direct conversion of a solid into vapour without passing through the liquid state.

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Test: Exploring Mixtures and Their Separation - 2 - Question 3
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Which of the following substances does NOT sublime?

Detailed Solution: Question 3

Sand does not sublime. Camphor, naphthalene, and dry ice are sublimable substances.

Test: Exploring Mixtures and Their Separation - 2 - Question 4
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The particle size in a suspension is:

Detailed Solution: Question 4

Suspension particles are larger than 1000 nm. They are visible and settle on standing.

Test: Exploring Mixtures and Their Separation - 2 - Question 5
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Centrifugation is used to separate blood components in a laboratory. It works on the principle of:

Detailed Solution: Question 5

Centrifugal force pushes denser particles outward and they settle at the bottom.

Test: Exploring Mixtures and Their Separation - 2 - Question 6
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Which coagulant is commonly used to purify muddy water?

Detailed Solution: Question 6

Alum causes fine suspended particles to clump together and settle down.

Test: Exploring Mixtures and Their Separation - 2 - Question 7
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Making paneer from milk is an example of:

Detailed Solution: Question 7

Addition of lemon juice or vinegar causes proteins in milk to coagulate forming paneer.

Test: Exploring Mixtures and Their Separation - 2 - Question 8
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Which of the following is NOT a property of a colloid?

Detailed Solution: Question 8

Colloids cannot be separated by ordinary filtration.

Test: Exploring Mixtures and Their Separation - 2 - Question 9
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Milk is an example of:

Detailed Solution: Question 9

Milk is an emulsion (oil-in-water type colloid).

Test: Exploring Mixtures and Their Separation - 2 - Question 10
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The Tyndall Effect is observed when light is passed through:

Detailed Solution: Question 10

Tyndall effect occurs in colloids (and suspensions), not in true solutions.

Test: Exploring Mixtures and Their Separation - 2 - Question 11
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An alloy is a:

Detailed Solution: Question 11

Alloys are homogeneous mixtures and cannot be separated by physical methods.

Test: Exploring Mixtures and Their Separation - 2 - Question 12
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What is the approximate composition of brass?

Detailed Solution: Question 12

Brass is made of copper and zinc (approximately 80% Cu, 20% Zn).

Test: Exploring Mixtures and Their Separation - 2 - Question 13
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The dispersed phase and dispersion medium of an emulsion are both:

Detailed Solution: Question 13

In emulsions, both dispersed phase and medium are liquids.

Test: Exploring Mixtures and Their Separation - 2 - Question 14
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The scientist who formulated Oral Rehydration Solution (ORS) was:

Detailed Solution: Question 14

Dilip Mahalanabis developed ORS for treating dehydration.

Test: Exploring Mixtures and Their Separation - 2 - Question 15
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Which separation method is used in petroleum refineries?

Detailed Solution: Question 15

Fractional distillation separates crude oil into different components based on boiling points.

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About this Class 9 Practice Test

This test contains 15 MCQs on Exploring Mixtures and Their Separation - 2 with detailed solutions for each question. It is part of the Science Class 9 New NCERT 2026-27 (New Syllabus) course on EduRev, designed to align with the current Class 9 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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