Explanation:
(a)(i) Deficiency Disease; This is a disease caused by lack of or insufficient or inadequate supply of a specific vitamin or other nutrients/food substances.
(a)(ii)

Nutrient deficiency diseases	Remedy
Goitre/Goiter	Consumption of iodizes salt/sea food
Rickets	Consumption of a diet rich in calcium/phosphorous/vitamin D
Anaemia/Anemia	Eating a diet rich in iron
Kwashiokor	Diet of infant should contain protein
Scurvy	Consumption of foods/fruits rich in Vitamin C
Pellegra	Addition of naicin/vitamin K to diet
Night blindness	Consumption of food rich in Vitamin A
Beriberi	Consumption of food rich in vitamin B
Stunted growth/cretinism	Consumption of food rich in iodine
Marasmus	Consumption of protein and carbohydrate

(b) Procedure of Chemical Test for;
(i) Starch in a tuber of yam; The tuber of yam is peeled and sliced, a few drops of iodine solution is added to the peeled yam, blue-black colour formed indicates presence of starch.
(ii) Glucose in orange fruit; Orange fruit is cut and it's juice is extracted into a beaker/test tube, few drops of Benedict's solution/Fehling's solutions A and B is added to equal volume of orange juice, add heat gently, a red/orange/brick-red precipitate shows the presence of glucose. For Benedict's solution when heated shows red/yellow precipitate confirming presence of glucose