Please select a subject first
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Write true or false
Earthquake is a desirable change.
Concept: undefined >> undefined
Write true or false
Melting of ice is a physical change.
Concept: undefined >> undefined
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Write true or false
Burning of sugar is a temporary change.
Concept: undefined >> undefined
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Concept: undefined >> undefined
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Concept: undefined >> undefined
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
Concept: undefined >> undefined
Tick (√) the correct alternative from the choice given for the following statement.
The compound rust is a hydrated oxide of
Concept: undefined >> undefined
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
Concept: undefined >> undefined
True or false
Is melting of ice a reversible change?
Concept: undefined >> undefined
True or false
Change of seasons is a non-periodic change.
Concept: undefined >> undefined
True or false
In a physical change no net energy change is involved.
Concept: undefined >> undefined
True or false
Dissolving of a solid in liquid is a physical change.
Concept: undefined >> undefined
True or false
Is the process of digestion a physical change?
Concept: undefined >> undefined
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
Concept: undefined >> undefined
Tick the most appropriate answer.
Physical changes are
Concept: undefined >> undefined
Tick the most appropriate answer.
Photosynthesis requires
Concept: undefined >> undefined
Fill in the blank
Changes that occur in nature are called ______
Concept: undefined >> undefined
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Concept: undefined >> undefined
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 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 formed | e. irreversible change |
| f . slow change |
Concept: undefined >> undefined
Write true or false
Burning of paper and formation of curd are reversible changes.
Concept: undefined >> undefined
