Question Set B

CBSE 11th Chemistry Structure of Atom Model Questions Papers Study Material - QB365

Download CBSE Class 11th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Chemistry

Questions:

Multiple Choice Question

50 x 1 = 50

Considering the elements F, Cl, O and N, the correct order of their chemical reactivity in terms of oxidizing property is :

(a)

F > Cl > O > N

(b)

F > O > Cl > N

(c)

Cl > F > O > N

(d)

O > F > N > Cl

Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is :

(a)

B > C > Si > N > F

(b)

Si > C > B > N > F

(c)

F > N > C > B > Si

(d)

F > N > C > Si > B

Considering the elements B, Al, Mg, and K, the correct order of their metallic character is :

(a)

B > Al > Mg > K

(b)

Al > Mg > B > K

(c)

Mg > Al > K > B

(d)

K > Mg > Al > B

Which one of the following statements is incorrect in relation to ionization enthalpy?

(a)

Ionization enthalpy increases for each successive electron.

(b)

The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration.

(c)

End of valence electrons is marked by a big jump in ionization enthalpy.

(d)

Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.

The size of isoelectronic species — F^– , Ne and Na⁺ is affected by______.

(a)

nuclear charge (Z)

(b)

valence principal quantum number (n)

(c)

electron-electron interaction in the outer orbitals

(d)

none of the factors because their size is the same

Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?

(a)

Valence principal quantum number (n)

(b)

Nuclear charge (Z)

(c)

Nuclear mass

(d)

Number of core electrons

Which of the following statements related to the modern periodic table is incorrect?

(a)

The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-shell.

(b)

The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.

(c)

Each block contains a number of columns equal to the number of electrons that can occupy that subshell.

(d)

The block indicates value of azimuthal quantum number (l) for the last subshell that received electrons in building up the electronic configuration.

In the modern periodic table, the period indicates the value of :

(a)

atomic number

(b)

atomic mass

(c)

principal quantum number

(d)

azimuthal quantum number

The elements in which electrons are progressively filled in 4f-orbital are called______.

(a)

actinoids

(b)

transition elements

(c)

lanthanoids

(d)

halogens

10.

Which of the following is not an actinoid?

(a)

Curium (Z = 96)

(b)

Californium (Z = 98)

(c)

Uranium (Z = 92)

(d)

Terbium (Z = 65)

11.

3d-transition series of elements starts with scandium which has the electronic configuration _____.

(a)

3d¹4s²

(b)

3d¹4s¹

(c)

3d² 4s²

(d)

3d³ 4s²

12.

General outer electronic configuration of d-block elements is _____.

(a)

\((n-1) d^{1-10} n s^{3}\)

(b)

\((n+1) d^{1-10} n s^{0-2}\)

(c)

\((n-1) d^{1-10} n s^{0-2}\)

(d)

\((n-1) d^{0} n s^{0-2}\)

13.

The electronic configuration of gadolinium (Atomic number 64) is _____.

(a)

[Xe] 4f³ 5d⁵6s²

(b)

[Xe] 4f⁷ 5d² 6s¹

(c)

[Xe] 4f⁷ 5d¹ 6s²

(d)

[Xe] 4f⁸ 5d⁶ 6s²

14.

Predict the position of an element having the electronic configuration \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{1}\) _____.

(a)

Period 4, group 6

(b)

Period 6, group 4

(c)

Period 3, group 1

(d)

Period 4, group 5

15.

Successive filling of 35 and 3p orbitals give rise to the third period. The number of elements present in this period are _____.

(a)

(b)

(c)

(d)

16.

The symbol and name according to the IUPAC system for the element with atomic number = 120,respectively are _____.

(a)

Ubn and unbinilium

(b)

Ubn and unbiunium

(c)

Ubn and unnilbium

(d)

Ubn and unnilium

17.

Periodic classification of elements can be done on the basis of electronic configuration and is used to examine the _____.

(a)

periodic trends in physical properties of elements

(b)

periodic trends in chemical properties of elements

(c)

Both (a) and (b)

(d)

None of the above

18.

Who developed the long form of the periodic table?

(a)

Niels Bohr

(b)

Moseley

(c)

Mendeleef

(d)

Lothar Meyer

19.

The period number in the long form of the periodic table is equal to _____.

(a)

magnetic quantum number of any element of the period

(b)

atomic number of any element of the period

(c)

maximum principal quantum number of any element of the period

(d)

maximum azimuthal quantum number of any element of the period

20.

Elements having similar outer shell electronic configuration in their atoms are arranged in _____.

(a)

groups

(b)

vertical columns

(c)

families

(d)

All of these

21.

Mendeleev's left the gap under aluminium and a gap under silicon having atomic weights 68 and 72 respectively. These elements respectively are _____.

(a)

Eka-aluminium and Eka-silicon

(b)

aluminium and silicon

(c)

Eka-germanium and Eka-silicon

(d)

Eka-aluminium and Eka-germanium

22.

Which of the following statements is incorrect?

(a)

Mendeleev's arranged elements in horizontal rows and vertical columns

(b)

Mendeleev's arranged elements in order of their increasing atomic number

(c)

Mendeleev's system of classifying elements was more elaborate than that of Lother Meyer

(d)

None of the above

23.

Which important property did Mendeleev use to classify the elements in his periodic table?

(a)

Atomic weight

(b)

Atomic number

(c)

Melting point

(d)

None of these

24.

Which of the following properties of atom could be explained correctly by Thomson model of atom?

(a)

Overall neutrality of atom7

(b)

Spectra of hydrogen atom

(c)

Position of electrons, protons and neutrons in atom

(d)

Stability of atom

25.

The first line in the Balmer series in the H atom will have the frequency _______.

(a)

3.29 x 10¹⁵ S^-1

(b)

4.57 x 10¹⁴ S^-1

(c)

8.22 x 10¹⁵ S^-1

(d)

8.02 x 10¹⁴ S^-1

26.

The ionisation enthalpy of hydrogen atom is 1.312 x 10⁶J mol^-1. The energy required to excite the electron in the atoms from n₁ = 1 to n2 = 2 is_______.

(a)

6.56 x 10⁵ J mol^-1

(b)

9.84 x 10⁵ J mol^-1

(c)

7.56 x 10⁵J mol^-1

(d)

8.51 x 10⁵ J mol^-1

27.

The electronic transition from n = 2 to n = 1will produce the shortest wavelength in (where, n = principal quantum number) _______.

(a)

He⁺

(b)

(c)

H⁺

(d)

Li²⁺

28.

In the line spectrum of hydrogen, the lines described by the formula \(\bar{v}=109,677\left(\frac{1}{2^{2}}-\frac{1}{n^{2}}\right) \mathrm{cm}^{-1}\) where, n = integer, n > 3 Constitutes _______.

(a)

Balmer series

(b)

Lyman series

(c)

Pfund series

(d)

Paschen series

29.

A ray of white light is spread out into a series of coloured bands of visible light are called _______.

(a)

visible band

(b)

spectrum

(c)

electronic spectrum

(d)

None of these

30.

According to the electromagnetic theory of Maxwell, which one is correct?

(a)

Charged particles when accelerated should emit electromagnetic radiation

(b)

Charged particles when accelerated should absorb electromagnetic radiation

(c)

Charged particles when retarted should emit EMR

(d)

None of the above

31.

On bombarding a beam of a-particles on the atom of the gola sheet, a few particles get deflected whereas most of them go straight and remains undeflected. This is due to _______.

(a)

the nucleus occupy much smaller volume as compared to the volume of atom

(b)

the force of repulsion on fast moving a-particles is very small

(c)

the neutrons in the nucleus do not have any effect on α-particles

(d)

the force of attraction on a-particles by the oppositely charged electron is not sufficient

32.

Which of the following conclusions could not be derived from Rutherford's a-particle scattering experiment?

(a)

Most of the space in the atom is empty

(b)

The radius of the atom is about 10^-10 m while that of nucleus is 10^-15 m

(c)

Electrons move in a circular path of fixed energy called orbits

(d)

Electrons and the nucleus are held together by electrostatic forces of attraction

33.

If the value of azimuthal quantum number is 2, what will be the values for magnetic quantum number?

(a)

(b)

(c)

(d)

34.

The maximum number of electrons in a sub-shell is given by the equation _______.

(a)

n²

(b)

2n²

(c)

21-1

(d)

21 + 1

35.

The energy needed to remove a single electron (most loosely bound) from an isolated gaseous atom is called _______.

(a)

ionisation energy

(b)

electronegativity

(c)

kinetic energy

(d)

electron affinity

36.

The outermost electronic configuration of manganese (at. no. = 25) is _______.

(a)

3d⁵4s²

(b)

3d⁶4s¹

(c)

3d⁷4s^o

(d)

3d⁶ 4s²

37.

The orbital with n = 3 and 1 = 2 is _______.

(a)

(b)

(c)

(d)

38.

de Broglie equation is _______.

(a)

\(\lambda =\frac { h }{ mv } \)

(b)

\(\lambda =\frac { hv }{ m } \)

(c)

\(\lambda =\frac { mv }{ h } \)

(d)

\(\lambda =hmv\)

39.

The idea of stationary orbits was first given by _______.

(a)

Rutherford

(b)

J.J. Thomson

(c)

Niels Bohr

(d)

Max Planck

40.

The Balmer series in the spectrum of hydrogen atom falls in _______.

(a)

ultraviolet region

(b)

visible region

(c)

infrared region

(d)

none of these

41.

In a sodium atom (atomic number = 11 and mass number = 23) and the number of neutrons is _______.

(a)

equal to the number of protons

(b)

less than the number of protons

(c)

greater than the number of protons

(d)

none of these

42.

Cathode rays are deflected by _______.

(a)

electric field only

(b)

electric and magnetic field

(c)

magnetic field only

(d)

none of these

43.

Which element has smallest size?

(a)

(b)

(c)

(d)

44.

Which one of the following is isoelectronic with Ne?

(a)

N3^-

(b)

Mg²⁺

(c)

AI³⁺

(d)

all of the above

45.

Which of the following species are not known?

(a)

AgOH

(b)

PbI₄

(c)

PI₅

(d)

SH₆

46.

Diagonal relationships are shown by _____.

(a)

Be and Al

(b)

Mg and Al

(c)

Li and Mg

(d)

Band P

47.

In halogens, which of the following, increases from iodine to fluorine?

(a)

Bond length

(b)

Electronegativity

(c)

The ionization energy of the element

(d)

Oxidizing power

48.

What is the electronic configuration of the elements of group 14?

(a)

ns² np⁴

(b)

ns²np⁶

(c)

ns² np²

(d)

ns²

49.

Which of the following oxides is neutral?

(a)

Sn0₂

(b)

(c)

Al₂O₃

(d)

Na₂O

50.

The highest ionization energy is exhibited by _____.

(a)

halogens

(b)

alkaline earth metals

(c)

transition metals

(d)

noble gases

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

Multiple Choice Question

50 x 1 = 50

Within a period, the oxidising character increases from left to right. Therefore, among F, 0 and N, oxidising power decreases in the order: F > 0 > N. However, within a group, oxidising power decreases from top to bottom. Thus, F is a stronger oxidising agent than Cl. Further because 0 is more electronegative than Cl, therefore, 0 is a stronger oxidising agent than Cl. Thus, overall decreasing order of oxidising power is: F > 0 > Cl > N, i.e., option (b) is correct.

In a period, the non-metallic character increases from left to right. Thus, among B, C, Nand F, non-metallic character decreases in the order: F > N> C> B. However, within a group, non-metallic character decreases from top to bottom. Thus, C is more non-metallic than Si. Therefore, the correct sequence of decreasing non-metallic character is: F> N> C> B > Si, i.e., option (c) is correct.

In a period, metallic character decreases as we move from left to right. Therefore, metallic character of K, Mg and Al decreases in the order: K > Mg > AI. However, within a group, the metallic character, increases from top to bottom. Thus, Al is more metallic than B. Therefore, the correct sequence of decreasing metallic character is: K> Mg > Al > B, i.e., option (d) is correct.

(d)
Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.

(a)
nuclear charge (Z)

Statement (b) is incorrect.
The d-block has 10 columns because a maximum of 10 electrons can occupy all the orbitals in a d subshell.

In the modern periodic table, each period begins with the filling of a new shell. Therefore, the period indicates the value of principal quantum number. Thus, option (c) is correct.

10.

(d)
Terbium (Z = 65)

11.

(a)
3d¹4s²

12.

13.

14.

(a)
Period 4, group 6

15.

(d)
8

16.

(a)
Ubn and unbinilium

17.

18.

(a)
Niels Bohr

19.

20.

(d)
All of these

21.

(a)
Eka-aluminium and Eka-silicon

22.

(b)
Mendeleev's arranged elements in order of their increasing atomic number

23.

(a)
Atomic weight

24.

(a)
Overall neutrality of atom7

25.

(b)
4.57 x 10¹⁴ S^-1

26.

(b)
9.84 x 10⁵ J mol^-1

27.

(d)
Li²⁺

28.

(a)
Balmer series

29.

(b)
spectrum

30.

(a)
Charged particles when accelerated should emit electromagnetic radiation

31.

(a)
the nucleus occupy much smaller volume as compared to the volume of atom

32.

33.

(d)
5

34.

(d)
21 + 1

35.

(a)
ionisation energy

36.

(a)
3d⁵4s²

37.

38.

(a)
\(\lambda =\frac { h }{ mv } \)

39.

40.

(b)
visible region

41.

42.

(b)
electric and magnetic field

43.

(b)
N

44.

(d)
all of the above

45.

46.

47.

48.

49.

(b)
CO

50.

(b)
alkaline earth metals

CBSE 11th Chemistry Structure of Atom Model Questions Papers Study Material - QB365 Set B

QB365 Student Learing Managemnet System

Std: 11th Standard CBSE - Chemistry

chapter: Structure of Atom - Model Questions Papers

Visit QB365-SLMS - https://www.qb365.in/slms/ Complete Questions and Answers

Questions:

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

NEW MCQ Practice Test - CBSE Class 11

Chemistry CBSE Class 11 MCQ Practice Test

CBSE Class 11 MCQ Practice Test

11th Standard CBSE Study Materials