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Classification of Elements and Periodicity in Properties

571 Questions Start Errorless Test
All Exams Errorless Allen
JEE (Main) 2020 Q51 Errorless Latest Trend MCQ
In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is
A.
Electronegativity
B.
Electron gain enthalpy
C.
Ionization enthalpy
D.
Atomic radius
JEE (Main) 2020 Q52 Errorless Latest Trend MCQ
Three elements X, Y and Z are in the $3^{rd}$ period of the periodic table. The oxides of X, Y and Z, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of X, Y and Z is
A.
X < Y < Z
B.
Z < Y < X
C.
X < Z < Y
D.
Y < X < Z
JEE (Main) 2020 Q53 Errorless Latest Trend MCQ
The atomic number of the element unnilennium is
A.
119
B.
109
C.
108
D.
102
JEE (Main) 2020 Q54 Errorless Latest Trend MCQ
The elements with atomic numbers 101 and 104 belong to, respectively
A.
Actinoids and Group 4
B.
Group 11 and Group 4
C.
Group 6 and Actinoids
D.
Actinoids and Group 6
JEE (Main) 2020 Q55 Errorless Latest Trend MCQ
The ionic radii of $O^{2-}$ , $F^{-}$ , $Na^{+}$ and $Mg^{2+}$ are in the order
A.
$O^{2-} > F^{-} > Na^{+} > Mg^{2+}$
B.
$F^{-} > O^{2-} > Na^{+} > Mg^{2+}$
C.
$O^{2-} > F^{-} > Mg^{2+} > Na^{+}$
D.
$Mg^{2+} > Na^{+} > F^{-} > O^{2-}$
JEE (Main) 2020 Q56 Errorless Latest Trend MCQ
In the sixth period, the orbitals that are filled are
A.
$6s,5f,6d,6p$
B.
$6s,5d,5f,6p$
C.
$6s,6p,6d,6f$
D.
$6s,4f,5d,6p$
NEET 2020 Q57 Errorless Latest Trend MCQ
Identify the incorrect match Column-I(Name), Column-II(IUPAC Name)
Column-IColumn-II
(P)Unnilunium
(Q)Unniltrium
(R)Unnilhexium
(S)Unununnium
(I)Mendelevium
(II)Lawrencium
(III)Seaborgium
(IV)Darmstadtium
A.
(S), (IV)
B.
(P), (I)
C.
(Q), (II)
D.
(R), (III)
NEET 2020 Q58 Errorless Latest Trend MCQ
Match the following
Which of the following is correct option
Column-IColumn-II
(P)CO
(Q)BaO
(R)$Al_{2}O_{3}$
(S)$Cl_{2}O_{7}$
(I)Basic
(II)Neutral
(III)Acidic
(IV)Amphoteric
A.
p-iv, q-iii, r-ii, s-i
B.
p-i, q-ii, r-iii, s-iv
C.
p-ii, q-i, r-iv, s-iii
D.
p-iii, q-iv, r-i, s-ii
JEE (Main) 2019 Q59 Errorless Latest Trend MCQ
In general, the properties that decrease and increase down a group in the periodic table, respectively, are
A.
Electronegativity and electron gain enthalpy
B.
Electronegativity and atomic radius
C.
Atomic radius and electronegativity
D.
Electron gain enthalpy and electronegativity
JEE (Main) 2019 Q60 Errorless Latest Trend MCQ
When the first electron gain enthalpy $(\Delta_{eg}H)$ of oxygen is $-141\mathrm{kJ / mol}$ , its second electron gain enthalpy is
A.
Almost the same as that of the first
B.
Negative, but less negative than the first
C.
A positive value
D.
A more negative value than the first
JEE (Main) 2019 Q61 Errorless Latest Trend MCQ
The electronegativity of aluminium is similar to
A.
Boron
B.
Carbon
C.
Lithium
D.
Beryllium
JEE (Main) 2019 Q62 Errorless Latest Trend MCQ
The 71 $^{st}$ electron of an element X with an atomic number of 71 enters into the orbital
A.
4f
B.
6p
C.
6s
D.
5d
JEE (Main) 2019 Q63 Errorless Latest Trend MCQ
The correct order of the atomic radii of C, Cs, Al and S is
A.
S < C < Al < Cs
B.
S < C < Cs < Al
C.
C < S < Cs < Al
D.
C < S < Al < Cs
JEE (Main) 2019 Q64 Errorless Latest Trend MCQ
The amphoteric hydroxide is
A.
$Ca(OH)_{2}$
B.
$Be(OH)_{2}$
C.
$Sr(OH)_{2}$
D.
$Mg(OH)_{2}$
JEE (Main) 2019 Q65 Errorless Latest Trend MCQ
The correct option with respect to the Pauling electronegativity values of the elements is
A.
Ga < Ge
B.
Si < Al
C.
P > S
D.
Te > Se
JEE (Main) 2019 Q66 Errorless Latest Trend MCQ
The element with $Z = 120$ (not yet discovered) will be an/a
A.
Transition metal
B.
Inner-transition metal
C.
Alkaline earth metal
D.
Alkali metal
JEE (Main) 2019 Q67 Errorless Latest Trend MCQ
The correct order of atomic radii is
A.
Ce > Eu > Ho > N
B.
N > Ce > Eu > Ho
C.
Eu > Ce > Ho > N
D.
Ho > N > Eu > Ce
JEE (Main) 2019 Q68 Errorless Latest Trend MCQ
The IUPAC symbol for the element with atomic number 119 would be
A.
unh
B.
uun
C.
une
D.
uue
JEE (Main) 2019 Q69 Errorless Latest Trend MCQ
The element having greatest difference between its first and second ionization energies, is
A.
Ca
B.
K
C.
Ba
D.
Sc
JEE (Main) 2019 Q70 Errorless Latest Trend MCQ
The group number, number of valence electrons, and valency of an element with atomic number 15, respectively, are
A.
16, 5 and 2
B.
16, 6 and 3
C.
15, 5 and 3
D.
15, 6 and 2
JEE (Main) 2019 Q71 Errorless Latest Trend MCQ
The pair that has similar atomic radii is
A.
Sc and Ni
B.
Ti and HF
C.
Mo and W
D.
Mn and Re
NEET 2019; JEE (Main) 2022 Q72 Errorless Latest Trend MCQ
For the second period elements the correct increasing order of first ionisation enthalpy is
A.
Li < Be < B < C < N < O < F < Ne
B.
Li < B < Be < C < O < N < F < Ne
C.
Li < B < Be < C < N < O < F < Ne
D.
Li < Be < B < C < O < N < F < Ne
NEET 2019 Q73 Errorless Latest Trend MCQ
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is
A.
$5f > 6p > 5p > 4d$
B.
$6p > 5f > 5p > 4d$
C.
$6p > 5f > 4d > 5p$
D.
$5f > 6p > 4d > 5p$
NEET 2018 Q74 Errorless Atomic and Ionic radii MCQ
The correct order of atomic radii in group 13 elements is
A.
B < Al < In < Ga < Tl
B.
B < Al < Ga < In < Tl
C.
B < Ga < Al < Tl < In
D.
B < Ga < Al < In < Tl
JEE (Main) 2017 Q75 Errorless Critical Thinking MCQ
The group having isoelectronic species is
A.
$O^{-}, F^{-}, Na, Mg^{+}$
B.
$O^{2-}, F^{-}, Na, Mg^{2+}$
C.
$O^{-}, F^{-}, Na^{+}, Mg^{2+}$
D.
$O^{2-}, F^{-}, Na^{+}, Mg^{2+}$