CHAPTER # 1 Periodic Classification of Elements & Periodicity MCQ's
1.
Which of the following
pairs are chemically dissimilar?
(A)
Na and K (B) Ba and Sr
(C) Zr and Hf (D) Ca and Zn.
(C) Zr and Hf (D) Ca and Zn.
2.
The total number of inner
transition elements is
(A)
10 (B) 14
(C)
28 (C) 30
3.
The alkali metal which is
liquid at 15oC is
(A)
K (B) Cs
(C)
Na (D) None
4.
Which of the following ion
will form most water soluble
hydroxide?
(A) K+
(B) Ni2+
(B) Zn2+
(C) Al3+
5.
Which of the following has
greatest tendency to lose electron?
(A)
F (B) Fr
(B)
S (C) Be.
6.
The oxide of which of the
following elements will be acidic in character
(A)
Mg (B) Rb
(C) Li (C) CI
7.
Which of the following is
isoelectronic with carbon atom?
(A)
Na+ (B) Al3+
(C)
O2-
(D) N+
8.
Which of the following ions
are paramagnetic in character?
(A)
Zn2+ (B) Cu+
(C)
Ni2+ (D) Ag+
9.
Ca2+ ion is
isoelectronic with
(A)
Mg2+ (B) Na+
(C)
Ar (D) Kr
10.
Gradual addition of
electronic shells in the noble gases causes a decrease in their
(A) Ionization
energy (B) atomic radius
(C) Boiling point (D) density.
(C) Boiling point (D) density.
11.
Which of the following has
highest first ionization potential?
(A) Carbon (B) Oxygen
(C) Nitrogen (C) Boron.
(C) Nitrogen (C) Boron.
12.
Which of the following has
the smallest size?
(A)
Na+ (B) Mg2+
(C)
Al3+
(D) CI
13.
Which of the following
element has the maximum electron affinity?
(A) F (B) S
(C) I (D) CI.
(C) I (D) CI.
14.
Which of the following is
isoelectronic as well as has the same structure as that of N2O
?
(A)
N3H (B) H2O
(B)
NO2 (C) CO2
15.
The atomic radius increases
as we move down a group because
(A) Effective nuclear charge increases
(B) Atomic mass increases
(C) Additive electrons are accommodated in new electron level
(D) Atomic number increase.
16.
Which one of the following
is an incorrect statement?
(A)
The ionization potential of
nitrogen is greater than that of
chlorine
(B)
The electron affinity of
fluorine is greater than that of chlorine
(C)
The ionization potential of
beryllium is greater than that of boron
(D)
The electronegativity of
fluorine is greater than that of chlorine.
17.
Electron affinity depends
on
(A) Atomic size
(B) Nuclear charge
(C) Atomic number
(C) Atomic number
(D)
Atomic size and nuclear charge both.
18.
Two elements whose
eletronegativities are 1.2 and 3.0, the
bond formed between them would be
(A) Ionic (B) covalent
(C)
Coordinate (C) metallic.
19.
Ionic radii are
(A) Directly proportional to square of effective nuclear charges
(B) Inversely proportional to effective nuclear charge
(C) Inversely proportional to square of effective nuclear charge
(D) Directly proportional to effective nuclear charge.
20.
Which of the following
oxides is atmospheric in character?
(A) CaO (B) CO2
(C)
SiO2 (D)
SnO2
21.
Mark the correct statement:
(A) Na+ is smaller than Na atom
(B) Na+ is larger than Na atom
(C) CI- is smaller than CI atom
(D) CI- and CI are equal in size
22.
Who introduced the zero
groups?
(A) Lothar Meyer (B) Lockery
(C)
Mendleev (D) Ramsay
23.
Element, of group I-B are
called
(A) Representative elements
(B) Transition elements
(C) Rare earth
(D) Coinage metals
24.
The element with Z = 24 is
placed in the period
(A) 5 (B) 2
(C)
3 (D)
4
25.
Which is the part of
metalloids?
(A)
NA and K (B) F and
CI
(C)
None of these (D) Cu and
Au
26.
Which one of the following
has the maximum electron affinity?
(A)
I (B) Br
(C)
CI (D) F
27.
On electrolysis of NaH,
hydrogen is liberated
(A)
At anode (B) in the
electrolyte
(C)
At cathode (D) none of them
28.
Elements with greater
number of electrons have _________values of ionization
energy.
a)
Only one b)
More than one
c)
Zero d)
Infinite
29.
Which of the following
possess maximum hydration power?
a)
Na+ b) K+
c)
Mg+2 d) Ca+2
30.
Higher value of electron
affinity means_________
a.
Atom will lose electron
easily
b.
Atom will gain electron
easily
c.
Atom may form di-positive
ion
d.
The reason is unknown
31.
Melting points of VII-A
group ___________ down the group
a. Increase b Decrease
c. Remain constant d. No regular trend
32.
Oxidation state of an atom
represents______
a.
No. of electrons gained
b.
No. of electrons lost
c. No. of electrons gained or lost
d.
None of above correctly
represent it
33.
Mendeleev’s periodic table
was based on
a) Atomic number b) Atomic mass
c) Atomic volume d) Electronic configuration
34.
Elements present in a same
group have the same
a)
Atomic number
b)
Molecular weight
c)
Chemical properties
d)
Electronic configuration
35.
“s” and “p” block elements
are also called
a) Transition elements
b) Inert elements
c) Typical elements
d) Rare earth elements
36.
What is the symbol of the
element with only three electrons and three protons?
a) Li b)
C
c) Ag
d)
Cu
37.
Elements with seven
electrons in their valence shell are known as
a) Inert b) Lanthanides
c)
Halogens d)
Alkali metals
38.
Which of the following
pairs of elements are chemically most similar?
a) Na and Al b)
Cu and Cu
c) S
and F d)
Sc and Zn
39.
A student of chemistry will
identify positively the following symbols as sodium
23 40
a) W b) X
11 19
26 32
c)
Y d)
Z
13 16
40.
In the periodic table each
period begins with a metal, which is
a) Most electronegative
b) Most electropositive
c) Less electropositive
d) Less electronegative
41.
Which one of the following
is not a coinage metal?
a) Au b)
Cu
c) Ag
d)
Pd
42.
Which is the most metallic
element of 2nd period?
a) Lithium b)
Beryllium
c)
Boron d)
Carbon
43.
The outer most orbital
involved in chemical bonding is called
a) Molecular orbital b)
Complete orbital
c)
Valence orbital d) Free orbital
44.
Elements, which form basic
oxides are
a) Electropositive b)
Electronegative
c)
Inert d)
None of these
45.
Which of the following has
the most basic character?
a) Na2O b)
MgO
c) Al2O3 d)
P2O3
46.
Which of the following is
smallest in size?
a) K+1 b)
O-2
c) F-1 d)
Na+
47.
Ionization energy is lowest
for
a) Inert gases b)
Halogens
c) Alkali metals d) Alkaline earth metals
48.
An isotope of hydrogen
is
a) Neptunium b)
Plutonium
c)
Thorium d)
Tritium
49.
With respect to chlorine,
hydrogen will be
a) Electropositive b)
Electronegative
c)
Neutral d)
None of these
50.
Which of the following has
the highest electron affinity?
a) 1S2 2S2 2P3 b)
1S2 2S2 2P6 3S1
c)
1S2 2S2 2P5 d)
1S2 2S2 2P5
51.
Excluding hydrogen and
helium, the smallest elements in the periodic table is
a) Lithium b)
Fluorine
c)
Cesium d)
Iodine
52.
Which halogen has the
smallest electron affinity?
a) F b)
Cl
c) Br
d)
I
53.
The element with atomic
number 7 is likely to have same properties to the element whose atomic number
is
a) 11 b)
2
c) 15
d)
F
54.
Which of the following will
have largest size?
a) Br b)
I -1
c) I d)
F
55.
In its chemical properties,
calcium is most similar to
a) Cs b)
Cu
c) Sc
d)
Sr
56.
Which two of the following
are iso electronic with one another?
a) Na+ and O b)
Na+ and K+
c)
Na+ and Ne d) Ne and O
57.
Which of the following is a
transuranic element?
a) Americium b)
Plutonium
c)
Neptunium d)
All of these
58.
The hydrogen, which is
present in the atmosphere of sun and stars in a large amount, is
a) H2 b) H
c) H+ d)
H-
59.
Cesium and Francium are
liquids above
a) 10oC b) 15oC
c) 20oC d)
30oC
60.
In an aqueous solution the
hydrides of alkali metals are
a) Stable b)
Unstable
c) No
change d)
None of these
61.
As the atomic number of the
halogen increases, the halogens
a) Lose their outermost electrons less easily
b) Become less dense
c) Becomes lighter in color
d) Gain electrons less easily
62.
The electron affinity of
fluorine is
a) – 348.8 kj/mol b) –
337 kj/mol
c)
337 kj/mol d)
348.8 kj/mol
63.
Which ionic halides have
high m.p and b.p?
a) Fluoride b)
Chloride
c)
Bromide d)
Iodide
64.
Which gas is used in the
making of tungsten bulb filaments?
a) H2 b)
N2
c) O2
d)
CO2
65.
The ionic halides in order
of decreasing m.p and b.p can be arranges as
a) Iodide>bromide>chloride> fluoride
b) Bromide>chloride>fluoride>iodide
c) Chloride>bromide>iodide>fluoride
d) Fluoride>chloride>bromide>iodide
66.
A hydride ion and helium
atom has same number of
a) Protons b)
Neutrons
c)
Electrons d)
All of these
67.
Ionic hydrides are also
called
a) Saline hydrides b) Salt
like hydrides
c)
Both a & b d)
None of these
68.
The hydrides are acts as
powerful reducing agents are
a) Ionic b) Covalent
c)
Interstitial d)
Complex
69.
The hydrides which are non
stoichiometric in nature are
a) Ionic b) Covalent
c)
Interstitial d)
Complex
70.
Which one is the example of
complex hydride?
a) PH3 b) NaH
c)
LaH3 d) NaBH4
71.
The adsorption of hydrogen
by platinum is known as
a) Hydrogenation b)
Dehydrogenation
c)
Occlusion d)
Substitution
72.
From left to right in a
periodic table charge to mass ratio increases therefore the hydration energy
a) Decreases b)
Increases
c)
Remains constant d) None of these
73.
______ elements have been
discovered so far.
a) 100 b) 110
c)
120 d)
150
74.
_______ classified the then
known elements into metals, non metals and their derivatives.
a) Dobreiner b)
Al – Razi
c)
Newlands d)
Mendeleeve
75.
Dobreiner’s work led to the
law of triads which states that ______
a) Atomic weight of any one element was found to be approximately the mean of
the other two elements of triad.
b) Atomic weight of the middle element was found to be approximately the mean of
the other two elements of a triad.
c) Atomic number of any one element was found to be approximately the mean of
the other two elements of a triad.
d) Atomic number of the middle element was found t be approximately the mean of
the other two elements of a triad.
76.
The law of octaves was
given by _______
a) Dobreiner b)
Al – Razi
c)
Newlands d)
None of these
77.
Law of octave states that
______
a) The properties of every 6th element from the given one were similar to the first.
b) The properties of every 9th element from the given one were similar to the first.
c) The properties of every 8th element from the given one were similar to the first.
d) The properties of every 7th element from the given one were similar to the second.
78.
Mendeleev’s Periodic Table
was based on _______
a) Atomic number b) Atomic
mass
c)
Atomic volume d) Electronic
configuration
79.
Moseley’s work led to the
periodic law, which states that _______
a) The number of the electrons in the 1st energy level increases as the atomic number increases.
b) The properties of the elements are a periodic function of their atomic
mass.
c) The x – rays spectra of the elements are
more complex than the optical spectra.
d) The properties of elements are the periodic function of their atomic number.
80.
A pair of elements in the
same family in the periodic table classification is ________
a) Chlorine and carbon
b) Calcium and aluminum
c) Nitrogen and neon
d) Sodium and potassium
81.
In the period, the elements
are arranged in strict
sequence in order of _______
a) Increasing charges in the nucleus.
b) Increasing atomic weights.
c) Increasing number of electrons in valence shell.
d) Increasing valency.
82.
Uranium is a member of
a) s – block b)
p – block
c)
d – block d)
f – block
83.
How many ionization
energies can carbon have?
a) 1 b)
2
c)
4 d)
6
84.
Which ion has the maximum
polarization power?
a) L+ b)
Mg 2+
c)
Al 3+ d) O 2-
85.
Which of the following
halides is not oxidized by MnO2?
a) F b)
Cl-
c)
Br d)
I
86.
The process requiring
absorption of energy is
a) F → F b) Cl → Cl
c)
O → O2 d)
H → H
87.
Most of the known elements
are metals of ______ of periodic
table.
a) D – block b)
P – block
c)
III – group d) Zero block
88.
The volume in cubic
centimeters occupied by one
gram atom of the element is called ______
a) Atomic volume b) Atomic
weight
c)
Mass number d) None
89.
The lowest ionization
energies are found in the
a) Inert gases b) Alkali metals
c)
Transition elements d) Halogens
90.
The unit of ionization
energy is _______
a) Joule b)
Calorie
c)
Electron volt d) None
91.
The electropositive
elements form _____
a) Acidic oxides b) Basic oxides
c)
Neutral oxides d) Amphoteric
oxide
92.
The electronegative
elements form _____
a) Acidic oxides b) Basic oxides
c)
Neutral oxides d) Amphoteric
oxide
93.
The ionization energy of
nitrogen is more than oxygen because of _______
a) More attraction of electrons by the nucleus
b) More penetration effect
c) The extra stability of half filled p – orbital
d) The size of nitrogen atom is smaller.
94.
_______ ion has the largest
radius.
a) Al+3 b) Cl-1
c)
F-1 d)
O-2
95.
Ionic hydrides are usually
_______
a) Liquids at room temperature
b) Good reducing agents
c) Good electrical conductors in solid state
d) Easily reduced.
96.
The hydronium ion is a/an
_______
a) Ion with formula H2O+
b) Ion with the formula H3O+
c) Free radical rather than an ion
d) Ion formed by removal of H- form a water molecule.
97.
When steam is passed over
red hot coke at 1000oC, a mixture of carbon monoxide and hydrogen
gas is produced. It is known as
a) Heavy water b) Water gas
c)
Phosgen gas d) None
More than 300 different organizations from at least 40 countries worldwide have used Alfa Chemistry's products and services since its inception. 1-carboxymethyl-3-methylimidazolium nitrate
ReplyDelete