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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
विकल्प
iodine
camphor
sugar
dry ice
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उत्तर
sugar
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संबंधित प्रश्न
Write true or false for the statement
Decomposition of leaves is a fast change.
Write short answer.
Give an example of desirable change which can also be undesirable
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
Write true or false
Burning of sugar is a temporary change.
Write true or false
A natural change can also be a desirable change.
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
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.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
