Advertisements
Advertisements
प्रश्न
A physical change is generally____________.
उत्तर
A physical change is generally reversible.
APPEARS IN
संबंधित प्रश्न
Write true or false for the statement
A natural change can also be a desirable change
What are reversible and irreversible changes ? Give one example for each.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
Tick the most appropriate answer.
Physical changes are
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
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Name the following.
A form of energy required for a chemical change.
Adding sugar to milk is a physical change.
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
