Filtration & Evaporation — Homi Bhabha Class 6 Chemistry MCQs with Solutions
Free Homi Bhabha Class 6 Chemistry Filtration & Evaporation MCQs with step-by-step solutions (10 questions). Part of Methods of Separation. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Filtration & Evaporation · easy · theory
Filtration is used to separate …
A. Salt that is dissolved in water
B. Sugar dissolved in milk
C. Two gases from each other
D. An insoluble solid from a liquid ✓ Correct
Solution: Filtration separates an insoluble solid, such as sand, from a liquid because the solid cannot pass through the filter paper.
Q2 — Filtration & Evaporation · easy · theory
Which method is used to separate tea leaves from tea?
A. Filtration (using a strainer) ✓ Correct
B. Using a magnet
C. Evaporation
D. Winnowing
Solution: A strainer is a kind of filter; the tea leaves stay back while the liquid tea passes through, so it is filtration.
Q3 — Filtration & Evaporation · easy · theory
In filtration, the solid left behind on the filter paper is called the …
A. Solution
B. Vapour
C. Filtrate
D. Residue ✓ Correct
Solution: The solid that stays on the filter paper is called the residue.
Q4 — Filtration & Evaporation · easy · theory
The clear liquid that passes through the filter paper is called the …
A. Residue
B. Filtrate ✓ Correct
C. Sediment
D. Husk
Solution: The liquid that passes through the filter paper is called the filtrate.
Q5 — Filtration & Evaporation · medium · theory
To get salt back from a bowl of salt water, we use …
A. A magnet
B. Sieving
C. Filtration
D. Evaporation ✓ Correct
Solution: Salt is dissolved in the water, so on heating the water evaporates and the salt is left behind. This is evaporation.
Q6 — Filtration & Evaporation · medium · theory
During evaporation of salt water, the water …
A. Stays in the bowl and the salt escapes
B. Passes through a filter paper
C. Turns into vapour and escapes, leaving the salt behind ✓ Correct
D. Turns into salt
Solution: On heating, the water changes into vapour and escapes into the air, while the solid salt is left behind in the bowl.
Q7 — Filtration & Evaporation · medium · numerical
100 g of salt water is heated until all the water evaporates, leaving 8 g of salt. How much water evaporated?
A. 108 g
B. 92 g ✓ Correct
C. 8 g
D. 100 g
Solution: Water evaporated = total mixture − salt left = 100 − 8 = 92 g.
Q8 — Filtration & Evaporation · medium · theory
Why can we NOT separate salt from salt water by filtration?
A. Salt is magnetic
B. Filter paper does not let water through
C. Salt is dissolved, so it passes through the filter paper with the water ✓ Correct
D. Salt is too heavy for the filter paper
Solution: Dissolved salt passes through the filter paper along with the water, so filtration cannot separate it; evaporation is needed.
Q9 — Filtration & Evaporation · hard · theory
Sea water is let into shallow pans and left in the hot sun until dry salt is left behind. Which method is this?
A. Winnowing
B. Evaporation ✓ Correct
C. Magnetic separation
D. Filtration
Solution: The sun heats the sea water so the water slowly turns into vapour and escapes, leaving salt behind. This is evaporation.
Q10 — Filtration & Evaporation · hard · theory
A mixture of chalk powder and water is shaken well. Chalk does not dissolve. The best way to separate the chalk is …
A. Evaporation
B. Sieving
C. Filtration ✓ Correct
D. Winnowing
Solution: Chalk is an insoluble solid that stays as tiny bits in the water, so it can be caught on filter paper by filtration.