Nuclei Test

Result

Nuclei Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

The intensity of gamma radiantion from a given source is I . On passing through 36 mm of lead , it is reduced to I/8 . The thickness of lead which will reduce the intensity to I/2 will be

A
12 mm

B
18 mm

C
9 mm

D
6 mm
Question 2
1 / -0

A freshly prepared radioactive sample of halflife 1 hour emits radiations that are 128 times as intense as the permissible safe limit . The minimum time after which this sample can be safely used is

A
14 hours

B
7 hours

C
128 hours

D
256 hours
Question 3
1 / -0

Which of the following is wrongly matched ?

A
Barometer - Pressure

B
Lactometer - Milk

C
Coluombs law - Charges

D
Nuclear reactor - Electron
Question 4
1 / -0

It is possible to understand nuclear fission on the basis of the

A
meson theory of the nuclear forces

B
proton - proton cycle

C
independent particle model of the nucleus

D
liquid drop model of the nucleus .
Question 5
1 / -0

Half - lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes . Initially the samples of A and B have equal number of nuclei . After 80 minutes the ratio of remaining numbers of A and B nuclei is

A
01:16

B
4 : 1

C
1 : 4

D
1 : 1
Question 6
1 / -0

An alpha particle has

A
a charge + e

B
a charge - 2 e

C
a mass equal to that of a deutron

D
charge to mass ratio equal to that of a deutron .
Question 7
1 / -0

The half life of radium is about 1600 years. Of 100 g of radium existing now , 25 kg will remain unchanged after

A
2400 yrs

B
3200 yrs

C
4800 yrs

D
6400 yrs
Question 8
1 / -0

Nucleus of an atom of mass no . 24 and charge no. 11 consists of

A
11 electrons , 11 protons 13 neutrons

B
11 electrons , 13 protons 11 neutrons

C
11 protons and 13 neutrons

D
11 protons and 13 electron

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Re-Attempt Weekly Quiz Competition

Nuclei Test - 2

Result

Nuclei Test - 2

Score

-

Rank

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SHARING IS CARING

Question 1

12 mm

18 mm

9 mm

​​​​​​6 mm

Question 2

14 hours

7 hours

128 hours

256 hours

Question 3

Barometer - Pressure

Lactometer - Milk

Coluombs law - Charges

Nuclear reactor - Electron

Question 4

meson theory of the nuclear forces

proton - proton cycle

independent particle model of the nucleus

liquid drop model of the nucleus .

Question 5

01:16

4 : 1

1 : 4

1 : 1

Question 6

a charge + e

a charge - 2 e

a mass equal to that of a deutron

charge to mass ratio equal to that of a deutron .

Question 7

2400 yrs

3200 yrs

4800 yrs

6400 yrs

Question 8

11 electrons , 11 protons 13 neutrons

11 electrons , 13 protons 11 neutrons

11 protons and 13 neutrons

11 protons and 13 electron

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6 mm