General Science Class 7

Isotopes of an element are identical in:

1. Mass number
2. Electron number
3. Valency
4. Atomic number

How many proton is present in the nucleus of Protium isotope?

1. 3
2. 2
3. 1
4. 0

How many proton and neutron are present in the nucleus of Deuterium isotope?

1. 3 and 2
2. 2 and 3
3. 1 and 1
4. 2 and 2

How many proton and neutron are present in the nucleus of Tritium isotope?

1. 2 and 1
2. 1 and 2
3. 3 and 2
4. 4 and 1

Which isotope is used for diagnosis and treatment of Wilson’s disease?

1. Copper - 64
2. Gallium - 67
3. Cobalt - 60
4. Iron - 59

Which among the following isotope is used to kill cancer cells by a particular type of treatment, known as radiotherapy?

1. Gallium - 67
2. Cobalt - 60
3. Iron - 59
4. Copper - 64

Which among the following isotope is used for detection of prolonged infection and cancer cells?

1. Copper - 64
2. Gallium - 67
3. Cobalt - 60
4. Iron - 59

Which among the following isotope is used for radiotherapy to stop the growth of cancer cells?

1. Copper - 64
2. Gallium - 67
3. Cobalt - 60
4. Iron - 59

Which among the following isotope is used for diagnosis of function of thyroid gland?

1. Iodine - 123
2. Copper - 64
3. Gallium - 67
4. Cobalt - 60

Which isotope is used to identity efficiency rates of organic and inorganic fertilizers?

1. Phosphorus - 32
2. Carbon - 14
3. Lead - 210
4. Nitrogen - 15