← Back to Chemistry-I

Classification of Elements and Periodicity in Properties

571 Questions Start Errorless Test
All Exams Errorless Allen
AIPMT 2015 Q76 Errorless Extended or long form of periodic table MCQ
The number of d-electrons in $Fe^{2+}$ (Z=26) is not equal to the number of electrons in which one of the following
A.
p - electrons in Cl (Z=17)
B.
d - electrons in Fe (Z=26)
C.
p - electrons in Ne (Z=10)
D.
s - electrons in Mg (Z=12)
JEE (Main) 2015 Q77 Errorless Critical Thinking MCQ
The ionic radii (in ƅ) of $N^{3-}, O^{2-}$ and $F^{-}$ are respectively
A.
1.36, 1.40 and 1.71
B.
1.36, 1.71 and 1.40
C.
1.71, 1.40 and 1.36
D.
1.71, 1.36 and 1.40
CBSE PMT 2014; KCET 2018 Q78 Errorless Atomic and Ionic radii MCQ
Which of the following orders of ionic radii is correctly represented
A.
$F^{-} > O^{2-} > Na^{+}$
B.
$Al^{3+} > Mg^{2+} > N^{3-}$
C.
$H^{-} > H > H^{+}$
D.
$Na^{+} > F^{-} > O^{2-}$
NEET (Karnataka) 2013 Q79 Errorless Electron affinity MCQ
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O
A.
Al < Ca < O < C < F
B.
Al < O < C < Ca < F
C.
C < F < O < Al < Ca
D.
Ca < Al < C < O < F
MP PET 2013 Q80 Errorless Electron affinity MCQ
The amount of energy released when $10^{6}$ atoms of iodine in vapour state are converted to $I^{-}$ ions is $4.9 \times 10^{-13} J$ . What will be electron affinity of iodine in eV per atom
A.
2.0
B.
2.5
C.
2.75
D.
3.06
JEE (Main) 2013 Q81 Errorless Critical Thinking MCQ
Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar
A.
$Ca < S < Ba < Se < Ar$
B.
$S < Se < Ca < Ba < Ar$
C.
$Ba < Ca < Se < S < Ar$
D.
$Ca < Ba < S < Se < Ar$
JEE (Main) 2013 Q82 Errorless Critical Thinking MCQ
The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of $Na^{+}$ will be
A.
-2.55 eV
B.
-5.1 eV
C.
-10.2 eV
D.
+2.55 eV
J & K CET 2012 Q83 Errorless Extended or long form of periodic table MCQ
Properties of elements are periodic function of number of present in the nucleus
A.
Protons
B.
Electrons
C.
Neutrons
D.
Mesons
CBSE PMT (Pre.) 2012 Q84 Errorless Atomic and Ionic radii MCQ
Identify the wrong statement in the following
A.
Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
B.
Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius
C.
Atomic radius of the elements increases as one moves down the first group of the periodic table
D.
Atomic radius of the elements decreases as one moves across from left to right in the $2^{nd}$ period of the periodic table
AFMC 2012 Q85 Errorless Atomic and Ionic radii MCQ
The correct order of increasing radii of the ions $Br^{-}, F^{-}, O^{2-}$ and $S^{2-}$ is as follows
A.
$Br^{-} < F^{-} < O^{2-} < S^{2-}$
B.
$S^{2-} < O^{2-} < F^{-} < Br^{-}$
C.
$F^{-} < O^{2-} < S^{2-} < Br^{-}$
D.
$F^{-} < Br^{-} < O^{2-} < S^{2-}$
AMU (Med.) 2012 Q86 Errorless Atomic and Ionic radii MCQ
Which of the following is the correct increasing order of the ionic radii
A.
$Li^{+} < Mg^{2+} < K^{+} < Al^{3+}$
B.
$Al^{3+} < Li^{+} < Mg^{2+} < K^{+}$
C.
$Al^{3+} < Mg^{2+} < K^{+} < Li^{+}$
D.
$K^{+} < Al^{3+} < Mg^{2+} < Li^{+}$
AMU (Med.) 2012 Q87 Errorless Ionisation Energy MCQ
The decreasing order of the first ionization energy (in $kJ \, mol^{-1}$ ) of He, Mg and Na is $He > Mg > Na$ . The increasing order of the $2^{nd}$ ionization energy (in $kJ \, mol^{-1}$ ) of these elements will be
A.
$Na < Mg < He$
B.
$Mg < Na < He$
C.
$Mg < He < Na$
D.
$Na < He < Mg$
Kerala PMT 2012 Q88 Errorless Electron affinity MCQ
The element with positive electron gain enthalpy is
A.
Hydrogen
B.
Sodium
C.
Oxygen
D.
Fluorine
E.
Neon
J & K CET 2012 Q89 Errorless Valency and oxidation state MCQ
The most stable oxidation state exhibited by thallium is
A.
0
B.
+1
C.
+2
D.
+3
WB JEE 2012 Q90 Errorless Valency and oxidation state MCQ
The stable bivalency of $Pb$ and trivalency of $Bi$ is
A.
Due to $d$ contraction in $Pb$ and $Bi$
B.
Due to relativistic contraction of the 6s orbitals of $Pb$ and $Bi$ , leading to inert pair effect
C.
Due to screening effect
D.
Due to attainment of noble configuration
Odisha JEE 2012 Q91 Errorless Critical Thinking MCQ
Which of the following is not a periodic property
A.
Electronegativity
B.
Atomic volume
C.
Covalent radii
D.
Atomic mass
Odisha JEE 2011 Q92 Errorless Atomic and Ionic radii MCQ
Which of the following has the largest size
A.
$S^{2-}$
B.
$Se^{2-}$
C.
$O^{2-}$
D.
$Te^{2-}$
Kerala PET 2011 Q93 Errorless Ionisation Energy MCQ
The correct decreasing order of first ionisation enthalpies of five elements of the second period is
A.
Be > B > C > N > F
B.
N > F > C > B > Be
C.
F > N > C > Be > B
D.
N > F > B > C > Be
E.
F > C > N > B > Be
Kerala PMT 2011 Q94 Errorless Electronegativity MCQ
The correct order of decreasing electronegativity values among the elements I-beryllium, II-oxygen, III-nitrogen and IV-magnesium is
A.
(II) > (III) > (I) > (IV)
B.
(III) > (IV) > (II) > (I)
C.
(I) > (II) > (III) > (IV)
D.
(I) > (II) > (IV) > (III)
E.
(II) > (III) > (IV) > (I)
CBSE PMT (Mains) 2010 Q95 Errorless Atomic and Ionic radii MCQ
Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is
A.
Mg < Ca < Cl < P
B.
Cl < P < Mg < Ca
C.
P < Cl < Ca < Mg
D.
Ca < Mg < P < Cl
CBSE PMT (Mains) 2010 Q96 Errorless Atomic and Ionic radii MCQ
Among the following which one has highest cation to anion size ratio
A.
CsI
B.
CsF
C.
LiF
D.
NaF
AMU (Engg.) 2010 Q97 Errorless Atomic and Ionic radii MCQ
Which of the following sets will have highest hydration enthalpy and highest ionic radius
A.
Na and Li
B.
Li and Rb
C.
K and Na
D.
Cs and Na
AMU (Med.) 2010 Q98 Errorless Ionisation Energy MCQ
Among the following, the third ionisation energy is highest for
A.
Magnesium
B.
Boron
C.
Beryllium
D.
Aluminium
J & K CET 2010 Q99 Errorless Ionisation Energy MCQ
Which element is expected to have lowest first ionisation energy
A.
Sr
B.
As
C.
Xe
D.
S
KCET 2010 Q100 Errorless Ionisation Energy MCQ
Generally, the first ionisation energy increases along a period. But there are some exceptions. One which is NOT an exception is .....
A.
N and O
B.
Na and Mg
C.
Mg and Al
D.
Be and B