Advertisements
Advertisements
Question
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Solution
physical change,
APPEARS IN
RELATED QUESTIONS
Explain the following giving an example.
Pure substance
State whether the following is physical or chemical changes.
burning of sugar —
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
True or false
In a physical change no net energy change is involved.
Fill in the blank
Heat is ________ by a gas during the process of condensation.
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.
Fill in the blank.
The reaction in which energy is evolved is called
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Natural and man-made change.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.