$A$ thin film of aluminum deposited on glass acts as a good mirror because ...............

Helium mixed with oxygen is used in the treatment of

Give uses of $CO_{2}$.

$A$ red solid is insoluble in water,but it becomes soluble if a small amount of $KI$ is added to the water. If this red solid is heated in a test tube,it produces a violet-colored vapor and some metallic droplets are observed on the cooler parts of the test tube. This red solid is........

In the following reaction,assign the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$: $\underline{C}O + H_2O \longrightarrow \text{No reaction}$

In which one of the following pairs,both oxides are acidic?