Nowadays, seeds are coated with Rhizobial solution or powder before sowing

Give scientific explanation: The particles of powder are given an electric charge while spraying them to form the powder coating.

A farmer adds Azotobacter culture to soil before sowing maize. Which mineral element is being replenished?

Give scientific reasons for the following: When an iron nail is dipped into a copper solution , a shiny coat of copper is formed on the nail.

A student added zinc strip to a solution of CuSO_4 . After several minutes, he observed that the blue colour of solution changed and a layer got deposited on zinc strip. The colour of the solution and that of the coating would respectively be ______

Write the uses of : Powder coating.

Seeds of some plants germinate immediately after shedding from the plants while in other plants they require a period of rest before germination. The later phenomena is called as dormancy. Give the.reasons for seed dormancy andsome methods to break it.

................. tissue is present in the hard coat of seeds, outer covering of coconut. Parenchyma Xylem Collenchyma Sclerenchyma

Lalitabai sowed seeds worth ₹ 13,700 in her field. She had to spend ₹ 5300 on fertilizers and spraying pesticides and ₹ 7160 on labour. If on selling her produce, she received ₹ 35,400, what was her profit or loss?

Give scientific reasons: Zinc powder reacts faster than zinc granules when added to copper sulphate (CuSO_4) solution.