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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
Classify the following as chemical or physical change:
Burning of paper and wood
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
State the various conditions that favour the process of evaporation.
Write true or false
Cutting of paper into pieces is a chemical change.
Photosynthesis cannot take place at night.
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
Keeping a stone in sunlight for few hours is ______.
Adding sugar to milk is a physical change.
