Advertisements
Advertisements
प्रश्न
Write true or false
Earthquake is a desirable change.
पर्याय
True
False
उत्तर
False
APPEARS IN
संबंधित प्रश्न
Write true or false for the statement
A natural change can also be a desirable change
State three differences between evaporation and boiling
State whether the following is physical or chemical changes.
cutting wood into small pieces —
True or false
Change of seasons is a non-periodic change.
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 chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
What will you take into account while identifying the following?
A chemical change in a substance.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
______ is the Universal Solvent.
Iron pipes coated with zinc do not get rusted easily.
