You have learnt in Std. 9th, medical, industrial and agricultural appl

1.	You have learnt in Std. 9th, medical, industrial and agricultural applications of radioisotopes. Write at least two applications each.
Answer» i. The uses of radioactive isotopes in the field of medicine : a. Polycythaemia : The red blood cell count increases in the disease polycythaemia. Phosphorus-32 is used in its treatment. b. Bone cancer : Strontium-89, strontium-90, samarium-153 and radium-223 are used in the treatment of bone cancer. ii. The uses of radioactive isotopes in the industrial field : a. Luminescent paint and radioluminescence : The radioactive substances radium, promethium, tritium with some phosphorus are used to make certain objects visible in the dark. e.g. Hands of a clock, krypton-85 is used in HID (High Intensity Discharge) lamps. b. Use in ceramic articles : 1. Luminous colours are used to decorate ceramic tiles, utensils, plates, etc. 2. Uranium oxide was earlier used to colour ceramics. iii. The uses of radioactive isotopes in the agriculture field : a. The genes and chromosomes that give seeds its properties like fast growth, higher productivity, etc., can be modified by means of radiation. b. Onions and potatoes are irradiated with gamma rays from cobalt-60 to prevent their sprouting.

You have learnt in Std. 9th, medical, industrial and agricultural applications of radioisotopes. Write at least two applications each.

Answer»

i. The uses of radioactive isotopes in the field of medicine :

a. Polycythaemia :

The red blood cell count increases in the disease polycythaemia. Phosphorus-32 is used in its treatment.

b. Bone cancer :

Strontium-89, strontium-90, samarium-153 and radium-223 are used in the treatment of bone cancer.

ii. The uses of radioactive isotopes in the industrial field :

a. Luminescent paint and radioluminescence :

The radioactive substances radium, promethium, tritium with some phosphorus are used to make certain objects visible in the dark.

e.g. Hands of a clock, krypton-85 is used in HID (High Intensity Discharge) lamps.

b. Use in ceramic articles :

1. Luminous colours are used to decorate ceramic tiles, utensils, plates, etc.

2. Uranium oxide was earlier used to colour ceramics.

iii. The uses of radioactive isotopes in the agriculture field :

a. The genes and chromosomes that give seeds its properties like fast growth, higher productivity, etc., can be modified by means of radiation.

b. Onions and potatoes are irradiated with gamma rays from cobalt-60 to prevent their sprouting.