Advertisements
Advertisements
प्रश्न
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
विकल्प
(i), (ii) and (iii)
i), (ii) and (iv)
(i), (iii) and (iv)
(ii), (iii) and (iv)
Advertisements
उत्तर
(i), (iii) and (iv)
The process in statement (ii) is a chemical change because rusting causes formation of a new compound. Other statements are examples of physical changes where no new compounds are formed. In the process mentioned in other statements, original form of iron can be obtained back from moulded forms.
APPEARS IN
संबंधित प्रश्न
Try segregating the things around you as pure substances or mixtures.
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
respiration in living beings —
Write true or false
Decomposition of leaves is a fast change.
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
Select the chemical changes from the following list of changes
Boiling of milk.
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Fill in the blanks in the following statements using the words given in the box.
| rusted, colourful, substance, chemical, physical, reversible, iron oxide, object |
- Making sugar solution is a ______ change.
- A physical change is generally ______.
- Grinding of wheat grain changes its size. It is a ______ change.
- Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.
Give an example of a physical change in which the color of the substance changes.
