Nuclear Chemistry Test

Result

Nuclear Chemistry Test - 25

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Weekly Quiz Competition

Question 1
4 / -1

A radioactive sample has half life of 1500 years. A sealed tube containing 1 g of a sample will contain g of the sample after 3000 years.The missing figure is

A
1 g

B
0.5 g

C
0.25 g

D
0 g
Question 2
4 / -1

A
isotopes and isotones

B
isotopes and isobars

C
isotones and isotopes

D
isobars and isotopes
Question 3
4 / -1

Which of the following is easily stopped by air?

A
X – rays

B
UV – rays

C
γ − rays

D
α − rays
Question 4
4 / -1

A
A = 87, M = 233

B
A= 86, M = 226

C
A= 88, M = 235

D
A= 88, M = 236

Solution
Question 5
4 / -1

Elements having the same number of nucleons and different number of protons are

A
Isotones

B
Positrons

C
Isotopes

D
Isobars
Question 6
4 / -1

A
4, 1

B
3, 7

C
8, 1

D
4, 7

Solution
Question 7
4 / -1

A
3

B
4

C
6

D
2

Solution
Question 8
4 / -1

In the case of a radioisotope, the value of t_1/2 and λ are identical in magnitude. The value is

A
1/0 .693

B
(0.693)²

C
0.693

D
(0.693)^1/2

Solution
Question 9
4 / -1

The activity of a sample of Ti (Z=22) decreased by 90% over a period of 10 years. The half life of sample is

A
1 year

B
2 years

C
3 years

D
5 years

Solution
Question 10
4 / -1

A certain nuclide has a half – life of 60 minutes. If a sample containing 600 atoms is allowed to decay for 90 minutes, the atoms remaining will be nearly

A
200

B
75

C
450

D
50

Solution