Write the name of one substance whose solubility increases slightly with rise of temperature.

Write the name of one substance whose solubility decrease gradually with rise of temperature.

Write the name of one substance whose solubility increase gradually with rise of temperature.

Write the name of one substance whose solubility increases rapidly with rise of temperature.

Explain with suitable reason.

The level of $\mathrm{conc}. {\mathrm{H}}_2{\mathrm{SO}}_4$ in the jar increases when exposed to atmosphere.

Explain with suitable reason.

Common salt becomes wet during rainy season.

Explain with suitable reason ferric chloride is stored in airtight bottles.

Explain with suitable reason.

Washing soda loses its weight when exposed to atmosphere.

What will happen when green vitriol exposed to atmosphere.