d. Naphthelene balls disappear when kept in clothes.
9. After rainfall, when do the rain drops dry away easily- on a sunny day or on a cloudy day? Give reasons.
10. How does matter change its state? Explain the effects of various factors.
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D. This is because of the process of sublimation
9.on sunny day the rain drops dry away fue the process of evaporation. It get the sufficient amount of heat by the sun to change its state of matter, where as on cloudy days it doesn't get that amount of heat.
Explanation:
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