MCQ
Heating of wax in a pan is a:
- ✓Reversible change.
- BIrreversible change.
- CPermanent change.
- DNone of these.
✓
Answer
Correct option: A.
Reversible change.
It is a reversible change. The melted wax again gives solid wax on cooling.
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DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion $A$" and the other labelled as "Reason $R$". You are to examine these two statements carefully and decide if the Assertion $A$ and Reason $R$ are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
Assertion $A:$ An electric bulb glows, only when an electric current passes through it.
Reason $(R):$ In an electric circuit the direction of current is taken from negative to positive terminal of the electric cell.
→Assertion $A:$ An electric bulb glows, only when an electric current passes through it.
Reason $(R):$ In an electric circuit the direction of current is taken from negative to positive terminal of the electric cell.