Question

Camphor disappears when it kept for few days Wet clothes do not dry easily on rainy day

Answer 1

1)certain materials like champhour shows this property of changing from solid phase to gaseous phase thats why the solid disappears.the gas is of no colour that is the reason it cannot be seen. this process is called sublimation

2)Wet clothes dry by evapoarting water from them. The higher the temperature and the lower the humidity the faster they dry. On a rainy day, the humidity, or water content, even indoors, is high, so they dry slower