ICSE Class 6 Chemistry - Pure Substances and Mixtures - Test 5 (Comprehensive)
1. Which statement correctly describes a pure substance?
A. It has fixed composition
B. It always has visible layers
C. It is made only by hand mixing
2. Which statement correctly describes a mixture?
A. It contains only one kind of particle
B. It always has a fixed formula
C. It contains two or more substances mixed physically
3. Which of the following is a pure substance?
A. Air
B. Pure oxygen
C. Soil
4. Which of the following is a mixture?
A. Fruit juice
B. Pure silver
C. Distilled water
5. Which mixture is homogeneous?
A. Sand and water
B. Oil and water
C. Salt solution
6. Which mixture is heterogeneous?
A. Sugar solution
B. Trail mix
C. Clean salt solution
7. In an ORS solution, the ORS powder is the:
A. Solute
B. Solvent
C. Filter paper
8. In an ORS solution, water acts as the:
A. Residue
B. Sediment
C. Solvent
9. A glass of water has five spoons of sugar dissolved in it. It is more likely to be:
A. Very dilute
B. Concentrated
C. A pure element
10. A solution in which no more salt dissolves at the same temperature is called:
A. Saturated solution
B. Pure metal
C. Empty solvent
11. Which method separates substances of different sizes?
A. Evaporation
B. Magnetism
C. Sieving
12. Which method can separate chalk powder from water?
A. Handpicking
B. Filtration
C. Freezing
13. Which method is best to obtain salt from sea water?
A. Evaporation
B. Handpicking
C. Using a magnet
14. Which mixture can be separated using a magnet?
A. Salt and water
B. Sugar and water
C. Iron pins and sand
15. Which method is suitable to remove dry leaves from pulses?
A. Condensation
B. Handpicking
C. Evaporation
16. Iron filings mixed with sand can still be attracted by a magnet because:
A. Components keep their properties in a mixture
B. Sand changes into iron
C. A new compound is formed
17. Which statement is true about a pure substance?
A. It is always separated by handpicking
B. Its composition changes every time
C. It cannot be separated by simple physical methods
18. Air is best described as a:
A. Pure compound
B. Homogeneous mixture
C. Pure element
19. During filtration, the liquid collected in the beaker is called:
A. Filtrate
B. Residue
C. Solute
20. A bowl has beans mixed with a few small stones. Which is the simplest separation method?
A. Evaporation
B. Filtration
C. Handpicking