ICSE Class 6 Chemistry - Introduction to Chemistry - Test 4 (Expert)
1. Two balloons are balanced on a stick. When one balloon is filled with air, that side goes down. What does this show?
A. Air has colour
B. Air has mass
C. Air is not matter
2. A dry paper is kept inside an inverted glass and pushed into water. The paper stays dry because:
A. Paper changes into plastic
B. Water has no volume
C. Air occupies space
3. The same amount of syrup is poured first into a tall glass and then into a wide bowl. What remains the same?
A. Volume of syrup
B. Shape of syrup
C. Shape of container
4. When the opening of a syringe filled with air is closed and the plunger is pushed, the air gets compressed. This shows that gases:
A. Have fixed shape
B. Can be compressed
C. Cannot occupy space
5. A bowl contains rice and pulses mixed together. It is a mixture because:
A. A new substance is formed
B. It contains only one element
C. The parts can be separated
6. A mixture of sugar and sand is added to water and filtered. What remains on the filter paper?
A. Sand
B. Sugar solution
C. Pure water vapour
7. Carbon dioxide is called a compound because it contains:
A. Only one kind of element
B. Elements chemically combined
C. Substances mixed by hand
8. Which example best shows a mixture with visible parts?
A. Silver
B. Pure water
C. Fruit salad
9. An iron nail rusts faster when kept in:
A. Moist air
B. Dry sand only
C. An airtight dry bottle
10. A brown coating appears on an iron gate after many rainy days. What is this coating?
A. Ice
B. Rust
C. Salt
11. A gas is passed through lime water and it turns milky. The gas is likely to be:
A. Oxygen
B. Nitrogen
C. Carbon dioxide
12. A burning candle is covered with an inverted jar standing in water. After the flame goes out, the water level rises because:
A. Some oxygen is used up
B. Glass changes into water
C. Water burns inside the jar
13. Which gas is present in the largest amount in air?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
14. Tiny water droplets form outside a cold glass. This shows that air contains:
A. Sand
B. Smoke only
C. Water vapour
15. Which apparatus is used to measure temperature?
A. Thermometer
B. Funnel
C. Test tube holder
16. Why is wire gauze placed on a tripod stand while heating a beaker?
A. To drink the liquid
B. To support the beaker and spread heat
C. To smell chemicals directly
17. If a test tube breaks during an experiment, what should a student do first?
A. Pick pieces with bare hands
B. Hide the broken glass
C. Inform the teacher
18. Salt water is left in the sun for many days. Water disappears and salt is left behind. This process is:
A. Evaporation
B. Burning
C. Rusting
19. Milk is changed into curd. Why is this a chemical change?
A. Only the shape changes
B. A new substance is formed
C. It only becomes colder
20. Which change is physical, not chemical?
A. Burning coal
B. Ripening of fruit
C. Cutting vegetables