Advertisements
Advertisements
प्रश्न
Fill in the blank
Changes that occur in nature are called ______
Advertisements
उत्तर
Changes that occur in nature are called Natural changes.
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Dissolving common salt in water.
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
water cycle in nature —
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct ?
- P is a compound
- X and Y are compounds
- X and Y are elements
- P has a fixed composition
Classify the following as a physical or a chemical change.
Melting of wax
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
When solute is dissolved in a solvent it forms a solution.
