Chapter 5: Exploring Mixtures and Their Separation — Online MCQ Test
SCIENCE · Grade 9 · CBSE(NCERT)
Practice Chapter 5: Exploring Mixtures and Their Separation with a free chapter-wise online MCQ test.
This chapter covers: Mixture Solution Colloid Suspension Filtration Evaporation Distillation Chromatography Solute Solvent Separation Techniques Investigating mixtures properties and laboratory methods....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 5: Exploring Mixtures and Their Separation — Important Questions & Answers
What is a mixture?
- A. A pure substance with fixed composition
- B. A combination of two or more substances physically mixed
- C. A substance that can be broken only by chemical reaction
- D. A single element found in nature
Answer: B. A combination of two or more substances physically mixed
A mixture contains two or more substances physically combined, so each component retains its own properties.
A mixture contains two or more substances physically combined, so each component retains its own properties.
In a salt solution, which component is the solute?
- A. Salt
- B. Water
- C. Air
- D. Sugar
Answer: A. Salt
The solute is the substance that gets dissolved. In salt solution, salt dissolves in water.
The solute is the substance that gets dissolved. In salt solution, salt dissolves in water.
Which of the following is NOT a method of separating mixtures?
- A. Filtration
- B. Evaporation
- C. Distillation
- D. Respiration
Answer: D. Respiration
Respiration is a life process, not a method used to separate components of a mixture.
Respiration is a life process, not a method used to separate components of a mixture.
A mixture contains sand, common salt, and water. What is the correct order of separation to obtain salt?
- A. Evaporation first, then filtration
- B. Filtration first, then evaporation
- C. Chromatography first, then filtration
- D. Distillation first, then sieving
Answer: B. Filtration first, then evaporation
First filter to remove sand, then evaporate the filtrate to obtain salt from the salt solution.
First filter to remove sand, then evaporate the filtrate to obtain salt from the salt solution.
A mixture contains two coloured dyes that are soluble in water and have different rates of movement on paper. Which statement is most appropriate?
- A. They can be separated by distillation because both are volatile
- B. They can be separated by chromatography because they move differently on the paper
- C. They can be separated by filtration because they are coloured
- D. They can be separated by magnetic separation because dyes are attracted to magnets
Answer: B. They can be separated by chromatography because they move differently on the paper
Chromatography separates soluble substances based on their different movement rates with the solvent on paper.
Chromatography separates soluble substances based on their different movement rates with the solvent on paper.