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प्रश्न
State whether the following is physical or chemical changes.
cutting wood into small pieces —
उत्तर
physical change,
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संबंधित प्रश्न
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Select the chemical changes from the following list of changes
Boiling of milk.
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
______ is the substance that is dissolved in a solvent.
What kind of change is shown by tearing off paper?
Match the items of Column I with the items of Column II
| Column 1 | Column II | ||
| (a) | Large crystals | (i) | Turns lime water into milky |
| (b) | Depositing a layer of zinc on iron | (ii) | Physical change |
| (c) | Souring of milk | (iii) | Rust |
| (d) | Carbon dioxide | (iv) | Sugar candy (Mishri) |
| (e) | Iron oxide | (v) | Chemical change |
| (f) | Dissolving common salt in water | (vi) | Galvanisation |
Give two examples for each of the following cases:
Physical changes which are not reversible.
