The following statements, describe the steps to detect the presence of metanil yellow in dal. One of the four statements given below is incorrect.

(a) take 2 ml of food extract

(b) Grind 3-5 g of dal and prepare solution

(c) add 2-3 drops of concentrated H₂SO₄

(d) fitter the contents and collect the filter

What is inter-cropping? How are crops selected for inter-cropping?

Aditya added 1-2 drops of iodine to three test tubes A,B and C, containing 2 ml of food samples. A dark blue-black colour appeared in test tubes A and B. The correct order of food samples taken in test tubes

(a) rice, dal, potato (b) rice, potato, dal (c) potato, dal, rice (dal, rice, potato

What is green revolution?

Mention the crop whose production has increased by blue revolution and yellow revolution.