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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
The compound rust is a hydrated oxide of
विकल्प
copper
aluminium
iron
gold
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उत्तर
iron
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संबंधित प्रश्न
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Dissolving salt in water is a reversible change.
What role does energy play in initiating a chemical change ?
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Write true or false
Melting of ice is a physical change.
A physical change is temporary. Explain.
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Classify the Following as a Physical Or a Chemical change.
Glowing of an Electric Bulb
Fill in the blank.
The reaction in which energy is evolved is called
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
