What does the given experimental set-up depict?
Choose the correct option.

Hydroponics refers to growing plants in

Why is purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?

Which of the following statements are not correct in reference to hydroponics?
$I.$ It determines the mineral nutrients essential for the plants.
$II.$ The hydroponics involves the culture of plants in a soil with,defined mineral solution.
$III.$ Hydroponics requires purified water with non-defined mineral nutrient salts.
$IV.$ In the hydroponics technique,plants are grown in sandy soil with nutrient solution.
$V.$ By this method,essential elements required for the growth of plants can be identified and their deficiency symptoms can also be discovered.
Choose the correct options.

$I.$ The practice of growing plants in nutrient-enriched water without soil is called....
$II.$ The system of growing plants with their roots bathed in nutrient mist (a cloud of moisture in air) is called....
Complete the given statements ($I$ and $II$) with the correct pair of options given below.

Hydroponics is $............$