Chapter Exam

Chapter-9 Methods of Separation — Online MCQ Test

Q: What is the process of separating insoluble solids from a liquid using a filter paper called?

Answer: A. Filtration — Filtration is the standard method used to separate solid particles from liquids by passing the mixture through filter paper.

Q: Which separation method involves settling of heavier particles to the bottom of a liquid?

Answer: B. Sedimentation — Sedimentation is the process where denser particles settle down at the bottom due to gravity, allowing clearer liquid to be separated.

Q: Sedimentation is often followed by which process to get clear liquid?

Answer: B. Decantation — After sedimentation, decantation is used to carefully pour off the clear liquid from the top, leaving the settled particles behind.

SCIENCE · Grade 6 · CBSE(NCERT)

Practice Chapter-9 Methods of Separation with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 6 SCIENCE. This chapter covers: filtration - sedimentation - winnowing - separation techniques. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-9 Methods of Separation — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 6 SCIENCE — Chapter-9 Methods of Separation, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the process of separating insoluble solids from a liquid using a filter paper called?

A. Filtration ✓
B. Sedimentation
C. Winnowing
D. Evaporation

Answer: A. Filtration
Filtration is the standard method used to separate solid particles from liquids by passing the mixture through filter paper.

Which separation method involves settling of heavier particles to the bottom of a liquid?

A. Filtration
B. Sedimentation ✓
C. Winnowing
D. Decantation

Answer: B. Sedimentation
Sedimentation is the process where denser particles settle down at the bottom due to gravity, allowing clearer liquid to be separated.

Sedimentation is often followed by which process to get clear liquid?

A. Winnowing
B. Decantation ✓
C. Evaporation
D. Condensation

Answer: B. Decantation
After sedimentation, decantation is used to carefully pour off the clear liquid from the top, leaving the settled particles behind.

How does the pore size of filter paper affect filtration efficiency?

A. Larger pores allow faster flow but may let fine particles pass through ✓
B. Smaller pores always work better regardless of particle size
C. Pore size has no effect on filtration
D. Filter paper does not have pores

Answer: A. Larger pores allow faster flow but may let fine particles pass through
The pore size must match the particle size; larger pores filter faster but may not trap fine particles, while smaller pores filter more thoroughly but slowly.

In competitive exam: A mixture of milk and water cannot be separated by simple physical methods like filtration or sedimentation. Why?

A. Milk is a pure substance
B. Milk is a colloidal solution where particles are too small to be filtered or settled easily ✓
C. Milk dissolves in water completely
D. Filtration always works for all liquids

Answer: B. Milk is a colloidal solution where particles are too small to be filtered or settled easily
Milk is a colloid with extremely fine particles (5-100 nm) that pass through regular filter paper and do not settle under normal gravity conditions.