Atomic Structure - General Knowledge Questions

1 .
Who has been selected as the external auditor of the International Atomic Energy Agency (IAEA) fortheperiod between 2022 to 2027?
A)
R. K. Mathur
B)
Manoj Sinha
C)
G C Murmu
D)
Rajiv Mehrishi

Correct Answer :   G C Murmu

The Comptroller and Auditor General (CAG) of India, G C Murmu has been selected as the external auditor of the International Atomic Energy Agency (IAEA), for a period of six years. His tenure will be valid from 2022 to 2027.

2 .
An atom differs from its ion in
A)
Mass number
B)
Nuclear charge
C)
Number of neutrons
D)
Number of electrons

Correct Answer :   Number of electrons

3 .
Carbon-12 atom has_____
A)
6 electrons, 6 protons, 6 neutrons
B)
6 electrons, 12 protons, 6 neutrons
C)
12 electrons, 6 protons, 6 neutrons
D)
18 electrons, 6 protons and 6 neutrons

Correct Answer :   6 electrons, 6 protons, 6 neutrons

4 .
The electronic configuration of an atom having atomic number 20 is
A)
2, 8, 10
B)
2, 6, 8, 4
C)
2, 8, 8, 2
D)
2, 4, 8, 6

Correct Answer :   2, 8, 8, 2

5 .
The isotopes of neutral atoms of an element differ in
A)
Atomic number
B)
Mass number
C)
Number of electrons
D)
Chemical properties

Correct Answer :   Mass number

6 .
Which of the following statements is not true with respect to photoelectric effect
A)
The plot of K.E. of the photoelectrons against frequency of absorbed radiation gives a straight line with slope equal to h and intercept ro
B)
The plot of kinetic energy of the photoelectrons versus the intensity of incident radiation with constant frequency gives a straight line parallel to x-axis
C)
When intensity of light is increased the number of photons ejected increases but the energies of these electrons are the same
D)
The plot of kinetic energy of the photoelectrons against frequency of absorbed radiation gives a straight line parallel to x-axis

Correct Answer :   The plot of kinetic energy of the photoelectrons against frequency of absorbed radiation gives a straight line parallel to x-axis

7 .
A covalent bond is also called as_____
A)
Metal bond
B)
Molecular bond
C)
Atomic bond
D)
None of the above

Correct Answer :   Molecular bond

8 .
The proton is heavier than an electron by_____
A)
100 times
B)
1000 times
C)
1840 times
D)
1880 times

Correct Answer :   1840 times

9 .
Cathode rays are deflected towards______
A)
postive electrode
B)
negative electrode
C)
both electrodes
D)
none of the electrodes

Correct Answer :   postive electrode

10 .
How are the subshells in an atom labelled?
A)
s, p, d, f, g
B)
s, p, f, g, d
C)
s, f, g, d, f
D)
s, d, g, p, f

Correct Answer :   s, p, d, f, g

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