Advertisements
Advertisements
Question
Write true or false
Burning of sugar is a temporary change.
Options
True
False
Advertisements
Solution
False
APPEARS IN
RELATED QUESTIONS
Classify the following as chemical or physical change:
Cutting of trees
Explain the following giving an example.
Pure substance
Solve this crossword by using the clues that follow-
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1 . It is the change that takes place in case of swinging pendulum of a clock. –
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change.
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Filling up a balloon with hot air is a _______ change.
Water is the universal solvent. Why?
Give two examples for the following case:
Physical changes which are reversible
