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प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
विकल्प
True
False
उत्तर
This statement is False.
Explanation:
Cutting a log of wood into pieces is a physical change.
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संबंधित प्रश्न
Chemical changes are accompanied by changes in energy.
State the various conditions that favour the process of evaporation.
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
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.
State which of the following pertain to – chemical changes.
(a) Substance retains its identity
(b) The change is permanent
(c) No new substance is formed
(d) Is easily reversible
(e) Produces one or more new substances by a change in its composition
(f) The change is temporary
(g) The composition and properties of the original substance are not altered.
Natural changes which take place in nature on their own, are beyond the control of human being.
Iron pipes coated with zinc do not get rusted easily.
