Q4 of 465 Page 58

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

rice, potato and dal.

The test tube A and B contain rice and potato that has carbohydrate and when iodine is mixed in it then the dark blue colour appears.

Discuss two ways of incorporating desirable characteristics into crop varieties.

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

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

(d) fitter the contents and collect the filter

What is green revolution?

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