PPSC Lecturer Chemistry MCQs |

PPSC FPSC Lecturer Chemistry Solved MCQs Test No. 62

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There will be 25 multiple choice question in the test.
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Test Instructions:-
Test Name	Lecturer Chemistry
Subject	Chemistry Test 62
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

Lecturer Chemistry Online Test No. 62

1 / 25

How many d-electrons are present in Cr²⁺ ion?

2 / 25

The atomic number of an element is 35. What is the total number of electrons present in all the p orbitals of the ground state atom of that element?

3 / 25

The total spin resulting from a d³ configuration is:

3/2

Zero

4 / 25

Which of the following elements has least number of electrons in its M shell?

5 / 25

Millikan’s oil drop method is used to determine:

Velocity of electron

Mass of electron

Charge of electron

e/m ratio of electron

6 / 25

Which of the following does not travel with the speed of light?

De Broglie waves

X-rays

Gamma rays

All of these

7 / 25

Which one of the following pairs of ions have the same electronic configuration?

A). Sr³⁺, Cr³⁺

B). Fe³⁺, Mn²⁺

C). Fe³⁺, Co³⁺

D). Cr³⁺, Fe³⁺

8 / 25

The number of nodal planes in a p_x orbital is:

9 / 25

Which one of the following forms a colourless solution in aqueous medium?

a). Fe⁺²

b). Cr³⁺

c). Mn⁺²

d). Zn²⁺

10 / 25

Set of isoelectronic species is:

A). H₂, CO₂, CN^–, O^–

B). N, H₂S, CO

C). N₂, CO, CN^–, O₂ ⁺²

D). Ca, Mg, Cl

11 / 25

What is the packet of energy called?

Proton

Photon

Positron

Electron

12 / 25

In ground state, an element has 13 electrons in its M shell. The element is:

Copper

Iron

Nickel

Chromium

13 / 25

Dual nature of particle was given by:

Bohr theory

Thomson model

Heisenberg principle

De Broglie equation

14 / 25

In which orbital the angular momentum of an electron is zero?

15 / 25

l = 3, then the values of magnetic quantum numbers are?

± 1, ± 2, ± 3

0, ± 1, ± 2, ± 3

–1, –2, –3

0, + 1, + 2, + 3

16 / 25

Quantum numbers of an atom can be defined on the basis of:

Aufbau’s principle

Heisenberg’s uncertainity principle

Hund’s rule

Pauli’s exclusion principle

17 / 25

If the electron of a hydrogen atom is present in the first orbit, the total energy of the electron is:

A). –e²/2r

B). –e²/r

C). –e²/r²

D). –e²/2r²

18 / 25

Chromium is represented by the electronic configuration:

A). [Ne] 3s² 3p⁶ 3d¹ 4s²

B). [Ne] 3s² 3p⁶ 3d² 4s¹

C). [Ne] 3s² 3p⁶ 3d⁵ 4s¹

D). [Ne] 3s² 3p⁶ 4s² 3d⁴

19 / 25

How many electrons can be accommodated in a p-orbital?

6 electrons

2 electrons

4 electrons

None of these

20 / 25

The quantum number ‘m’ of a free gaseous atom is associated with:

The effective volume of the orbital

The shape of the orbital

The spatial orientation of the orbital

The energy of the orbital in the absence of a magnetic field

21 / 25

Wavelength of spectral line emitted is inversely proportional to:

Energy

Velocity

Radius

Quantum number

22 / 25

The outermost configuration of most electronegative element is:

A). a) ns² np⁵

B). ns² np⁶

C). ns² np⁴

D). ns² np⁶

23 / 25

To explain the structure of atom the first use of quantum theory was made by:

Heisenberg

Bohr

Planck

Einstein

24 / 25

The radius of hydrogen atom is 0.53 Å. The radius of Li2+ is of:

A). 1.27 Å

B). 0.17 Å

C). 0.57 Å

D). 0.99 Å

25 / 25

Number of orbitals in L energy level:

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