Question

Q.1 Answer in one word or sentence.
1.) Which isotope is used in treatment of cancer?
2) Who discovered neutron?
3.)Name the compounds a) CaCo3 b) K2 SO4 c) Mg Cl2 d) H2O

4) What is causative agent of typhoid?
5) Give 2 examples of unicellular organism
6) What is basic unit of classification?
7) What is audible range of average human ear?
8) How is work done by a force measured?
9) Name the type of energy possessed by a stretched rubber band.
10) What is minimum distance of the obstacle from the source of sound for
hearing distinct echo?​

Answer 1

Answer:

1)cobalt60

2)chadwick

3)cacium carbonate,potassium sulphate,magnesium chloride,water

4)salmonella typhi

5)amoeba,protozoan

6)species

7)20to20000hz

8)work=forceper unit area

9)potential energy

10)more than 17.2m

hope this will help uhh

Answer 2

1.There are different isotopes used for treatment of different types of cancer. Here I am mentioning just a little………

radioactive iodine — (I^131) for treatment of thyroid gland.

radioactive phosphorus — (P^32) for treatment of leukaemia.

radioactive cobalt — (Co^60) for malignant cancer.

radioactive sodium - (Na^24) for heart.

(2) James Chadwick discovered neutron.

(3) (a)Calcium carbonate (CaCo3)

(b)potassium sulfate.

(c) Magnesium chloride.

(d) water or dihydrogen monoxide (H20)

(4)Salmonella typhi is causative agent of typhoid.

(5) Bacteria and amoeba are examples of unicellular organism.

(6)Species is the basic unit of classification for living organisms. It is the smallest and basic unit of classification.

(7)20 to 20,000 hz is audible range of average human ear.

(8)work done by a force measured in joules.

(9) Elastic potential energy possessed by a stretched rubber band.

(10) 17.2 m is minimum distance of the obstacle from the source of sound for hearing distinct echo