Chemistry MCQs Ch No.5 Atomic Structure Online MDCAT

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Book Name : Chemistry
Chapter No. 05
Chapter Name : Atomic Structure
Total MCQ from Text Book : 58
Book Version : 2022
Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade : 11 ( F.Sc. Intermediate)
Total Marks : 58
Total Time : 58 minutes

GRADE 11 - CHEMISTRY CHAPTER NO. 5 ATOMIC STRUCTURE

1 / 58

The positive particles obtained in-the discharge tube from Hydrogen gas was named proton by:

Millikan

Goldstein

Chadwick

Rutherford

2 / 58

The element which has maximum number of unpaired electrons:

Cr24

Ca20

Fe26

Cu29

3 / 58

Which is spherically symmetrical orbital?

4 / 58

Spin quantum number explains:

Self rotation of electron

Pauli's exclusion principal

Doublet of each line in hydrogen spectrum

All of the above

5 / 58

Each d-orbital has four lobes except:

dxy

dyz

dx2 - y2

dz2

6 / 58

Which of the following equation explains wave-particle duality?

E = mc2

E = hv

h/mv

C/v

7 / 58

Atoms with higher atomic numbers produce X-rays of:

Large wavelength

Shorter wavelength

Medium wavelength

All of these

8 / 58

Line spectrum is characteristic of:

Element

Compund

Alloy

Mixture

9 / 58

Which of the following set of quantum number is allowed?

n = 4 l = 2 m = 4 s = -1/2

n = 5 l = 3 m = 5 s = +1/2

n = 4 l = 3 m = 2 s = 0

n = 4 l = 2 m = 4 s = -1/2

10 / 58

Which of the following quantum number is not obtained from Schrondinger wave equation?

Principal quantum number (n)

Azimuthal quantum number (l)

Magnetic quantum number (m)

Spin quantum number (s)

11 / 58

Bohr's theory does not apply on:

He+

Li2+

12 / 58

[Ar]4s^l is the electronic configuration of:

21Sc

19K

20Ca

25Mn

13 / 58

When 6d is complete the entering electron goes to:

14 / 58

Maximum number of electrons in a subshell is given by:

2l + 3

2(2l+1)

2l + 2

2(2l-1)

15 / 58

Total number of spectral regions in a spectrum of white light is:

16 / 58

e/m of positive rays is maximum for:

Helium

Carbon

Sodium

Hydrogen

17 / 58

The negative charge on cathode rays was proved by:

J.J.Thomoson

Hund

Pauli

Crook

18 / 58

The energy associated with an electron revolving in^lst orbit of H-atom:

-1313.31 kJ mol-1

-328.32.33 kJ mol-1

-145.92 kJ mol-1

-82.08 kJ mol-1

19 / 58

The radius of second orbit of hydrogen atom is:

0.529 A

0.529 pm

2.11 A

2.11pm

20 / 58

The radius of first orbit of Hydrogen atom is:

0.529 A

0.529 pm

2.11 A

4.75 A

21 / 58

A node is the surface where the probability of finding an electron is:

Zero

25%

50%

100%

22 / 58

Orbitals having same energy are known as:

Valence orbitals

p-orbitals

d-orbitals

degenerate orbitals

23 / 58

Heisenberg's uncertainty principle's equation is:

&#916x &#916p &#8805 h/4&#960

&#916x &#916p = h/4&#960

&#916x &#916p > h/4&#960

&#916x &#916p = h

24 / 58

2p orbital has values of quantum number:

n = 2, l = 1

25 / 58

Electronic configuration of Cr is [Ar]

3d4 5s2

3d4 4s2

3d5 4s1

3d6 4s2

26 / 58

Orientations in a subshell are shown by quantum number:

Principla

Azimuthal

Magnetic

27 / 58

We can distinguish between two electrons of the same orbital by the quantum no. which is represented by:

28 / 58

What is the n + / value of 3d?

29 / 58

In Balmer series, limiting line lies in:

UV region

Visible region

IR region

All of these

30 / 58

Maximum frequency X-ray would be emitted from:

31 / 58

Radius of third shell of H-atom is:

2.11 A

4.75 A

8.4 A

13.22 A

32 / 58

de-Broglie wavelength associated with a-particle of mass 10^-6kg moving with a velocity of 10 m/s is:

6.62 x 10-7

6.62 x 10-11

6.62 x 10-21

6.62 x 10-29

33 / 58

If uncertainty in position of electron is zero, the uncertainty in its momentum would be:

Zero

Infinite

less than zero

h/2&#960

34 / 58

Which of the following has minimum e/m value for anode rays?

35 / 58

When tin stone is placed in the path of cathode rays it glows:

Red

Yellow

Green

Blue

36 / 58

In absence of magnetic field, the orbitals of f-subsliell are:

One fold degenerate

Three fold degen

Five fold degenerate

Seven fold degenerate

37 / 58

It has same number of electrons as an alpha particle:

H+

Li+

38 / 58

Which of the following particles would on losing an electron has its outermost p-orbital as half filled?

P- ion

Nitrogen atom

O+ ion

S+ ion

39 / 58

How many times of mass of neutron is greater than mass of electron ?

1480

2000

1840

1100

40 / 58

The value of e/m in coulombs kg^-1

9.1095 x 10 31

1.7588 x 10 11

1.7588 x 10 19

9.1095 x 10 11

41 / 58

Neutron was discovered by:

J.Thomson

Stoney

Goldstein

Chadwick

42 / 58

Proton was discovered by

Chadwick

E.Goldstein

Stoney

J.Perrin

43 / 58

Mass of electron in kg is:

9.1095 x 10 +31

9.1095 x 10 -19

9.1095 x 10 11

9.1095 x 10 -31

44 / 58

⁶⁵₂₉Cu + ¹₀n ? ⁶⁶₂₉Cu + Y What is y ?

Alpha rays

Beta rays

Electron

Gamma rays

45 / 58

¹⁴₇N + ¹₀n ? X + ⁴₂He What is x ?

Both a and B

46 / 58

¹₀ n ? ¹₊₁p +⁰₁ What is x ?

n00

n??

47 / 58

⁴₂ He + ⁹₄ Be ? ¹²₆ C + X What is x ?

n??

48 / 58

The process in which alpha particles are bombarded on Be is known as:

Artificial radioactivity

Natural radioactivity

n + l rule

Saytzeff's rule

49 / 58

When 6d orbital is complete, the entering electron goes into:

50 / 58

Orbitals having same energy are called:

hybrid orbitals

valence orbitals

degenerate orbitals

d-orbitals

51 / 58

Quantum number value for 2p orbitals are:

n = 2, l = 1

n = 1, l = 2

n = 1, l = 0

n = 2, l = 0

52 / 58

In the ground state of an atom, the electron is present:

In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

53 / 58

Splitting of spectral lines when atoms are subjected to strong electric field is called:

Zeeman effect

Stark effect

Photoelectric effect

Compton effect

54 / 58

Bohr model of atom is contradicted by:

Planck's quantum theory

Dual nature of matter

Heisenberg's uncertainty principle

All of the above

55 / 58

Rutherford's model of atom failed because :

The atom did not have a nucleus and electrons

It did not account for the attraction between protons and neutrons

It did not account for the stability of the atom

There is actually no space between the nucleus and the electrons

56 / 58

The wave number of the light emitted by a certain source is 2x10⁶m^-1. The wavelength of this light will be:

500 nm

500 m

200 nm

5 x 10 7

57 / 58

The velocity of photon is :

Independent of its wavelength

Depends on its wavelength

Equal to square of its amplitude

Depends on its source

58 / 58

The nature of the positive rays depend on:

The nature of electrode

The nature of discharge tube

The nature of residual gas

All of the above

Your score is

The average score is 49%

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