Advertisements
Advertisements
प्रश्न
True or false
Is melting of ice a reversible change?
विकल्प
True
False
Advertisements
उत्तर
True
APPEARS IN
संबंधित प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
Match the columns
| column A | coulmn B |
| 1. A change which cannot be easily reversed | a. man-made change |
| 2.A change that repeats itself at regular intervals | b. chemical change |
| 3. A change that is made by humans | c. physical change |
|
4. A change in which the original substance cannot be obtained |
d. periodic change |
| 5. A change where no new substance is formade | e. irreversible change |
| f. slow change |
Chemical changes are accompanied by changes in energy.
State three differences between evaporation and boiling
Name a chemical change which takes place in presence of:
Give the main differences between physical changes and chemical changes.
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
