Advertisements
Advertisements
प्रश्न
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Advertisements
उत्तर
chemical change.
APPEARS IN
संबंधित प्रश्न
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
State whether the following is physical or chemical changes.
photosynthesis —
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Read the paragraph and note down the various types of changes it mentions.
It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Digestion of food is a physical change.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
