MCQ
Choose the hardest material from the following:
- AWax.
- BCandle.
- CRubber.
- ✓Gold.
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S.No.
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Column-$I$
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Column-$II$
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$A.$
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The process of photosynthesis.
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$(p)$
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This process involves reversible and irreversible process respectively.
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$B.$
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Change in phases of moon.
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$(q)$
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This process involves presence of sunlight.
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$C.$
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Candle wax melts and bums at same time.
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$(r)$
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This is the process which involves physical and chemical change respectively.
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$D.$
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Cutting wood for furniture and burning of wood.
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$(s)$
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This process occur after a fixed interval of time.
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