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Classification of Elements and Periodicity in Properties

301 Questions Start Errorless Test
All Exams Errorless
Odisha JEE 2004 Q126 Errorless Atomic and Ionic Radii MCQ
The ionic conductance of following cation in a given concentration are in the order
A.
$Li^{+} < Na^{+} > K^{+} < Rb^{+}$
B.
$Li^{+} > Na^{+} > K^{+} > Rb^{+}$
C.
$Li^{+} < Na^{+} > K^{+} > Rb^{+}$
D.
$Li^{+} = Na^{+} < K^{+} < Rb^{+}$
BHU 2004 Q127 Errorless Ionisation Energy MCQ
Which of the following has the highest first ionisation energy
A.
Li
B.
Be
C.
B
D.
C
Kerala PMT 2004; WB JEE 2008 Q128 Errorless Ionisation Energy MCQ
In a given shell, the order of screening effect is
A.
s > p > d > f
B.
f > d > p > s
C.
p < d < s < f
D.
d > f < s > p
E.
f > p > s > d
AIEEE 2004 Q129 Errorless Ionisation Energy MCQ
The formation of the oxide ion $O_{(g)}^{2-}$ requires first an exothermic and then an endothermic step as shown below $O_{(g)} + e^{-} = O_{(g)}^{-}\Delta H^{o} = -142\ kJmol^{-1}$ $O_{(g)}^{-} + e^{-} = O_{(g)}^{2-}\Delta H^{o} = 844\ kJmol^{-1}$ This is because
A.
$O^{-}$ ion will tend to resist the addition of another electron
B.
Oxygen has high electron affinity
C.
Oxygen is more electronegative
AIEEE 2004 Q130 Errorless Electron Affinity MCQ
Which among the following factors is the most important in making fluorine the strongest oxidizing halogen
A.
Hydration enthalpy
B.
Ionisation enthalpy
C.
Electron affinity
D.
Bond dissociation energy
AFMC 2004 Q131 Errorless Electronegativity MCQ
Which of these have no unit
A.
Electronegativity
B.
Electron affinity
C.
Ionisation energy
D.
Excitation potential
AIEEE 2004 Q132 Errorless Electronegativity MCQ
Among $Al_{2}O_{3}, SiO_{2}, P_{2}O_{3}$ and $SO_{2}$ the correct order of acid strength is
A.
$Al_{2}O_{3} < SiO_{2} < SO_{2} < P_{2}O_{3}$
B.
$SiO_{2} < SO_{2} < Al_{2}O_{3} < P_{2}O_{3}$
C.
$SO_{2} < P_{2}O_{3} < SiO_{2} < Al_{2}O_{3}$
D.
$Al_{2}O_{3} < SiO_{2} < P_{2}O_{3} < SO_{2}$
AIEEE 2004 Q133 Errorless Valency and Oxidation State MCQ
Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in
A.
Forming covalent halides
B.
Forming polymeric hydrides
C.
Exhibiting maximum covalency in compounds
D.
Exhibiting amphoteric nature in their oxides
BHU 2004 Q134 Errorless Critical Thinking MCQ
Which of the following statement is correct with respect to the property of elements with an increase in atomic number in the carbon family (group 14)
A.
Atomic size decrease
B.
Ionisation energy increase
C.
Metallic character decrease
D.
Stability of $+2$ oxidation state increase
KCET 2003; MP PMT 2003; Odisha JEE 2010 Q135 Errorless Extended or Long Form of Periodic Table MCQ
Which of the following show diagonal relationship
A.
B and Si
B.
B and Al
C.
B and Ga
D.
B and C
AIEEE 2003 Q136 Errorless Extended or Long Form of Periodic Table MCQ
According to the periodic law of elements, the variation in properties of elements is related to their
A.
Atomic masses
B.
Nuclear masses
C.
Atomic numbers
D.
Nuclear neutron-proton number
MP PMT 2003; BHU 2003 Q137 Errorless Ionisation Energy MCQ
Correct order of polarising power is
A.
$Cs^{+} < K^{+} < Mg^{2+} < Al^{3+}$
B.
$K^{+} < Cs^{+} < Mg^{2+} < Al^{3+}$
C.
$Cs^{+} < K^{+} < Al^{3+} < Mg^{2+}$
D.
$K^{+} < Cs^{+} < Al^{3+} < Mg^{2+}$
Pb. CET 2003 Q138 Errorless Electron Affinity MCQ
Which of the following properties show gradual decrease with increase in atomic number across a period in the periodic table
A.
Electron affinity
B.
Ionisation potential
C.
Electronegativity
D.
Size of atom
Kerala PMT 2003 Q139 Errorless Electronegativity MCQ
An atom with high electronegativity has
A.
Large size
B.
High ionisation potential
C.
Low electron affinity
D.
Low ionisation potential
AIEEE 2003 Q140 Errorless Electronegativity MCQ
The solubilities of carbonates decreases down the magnesium group due to a decrease in
A.
Lattice energies of solids
B.
Hydration energies of cations
C.
Inter-ionic attraction
DCE 2003 Q141 Errorless Electronegativity MCQ
The polarising ability of which one of the following is highest
A.
Small highly +ve ion
B.
Large +ve ion
C.
Small highly -ve ion
D.
Large -ve ion
Kerala PMT 2003 Q142 Errorless Valency and Oxidation State MCQ
In any period the valency of an element with respect to oxygen
A.
Increases one by one from IA to VIIA
B.
Decreases one by one from IA to VIIA
C.
Increases one by one from IA to IVA and then decreases from VA to VIIA one by one
D.
Decreases one by one from IA to IVA and then increases from VA to VIIA one by one
UPSEAT 2003 Q143 Errorless Valency and Oxidation State MCQ
Which will show maximum non-metallic character
A.
$B$
B.
Be
C.
$Mg$
D.
Al
RPET 2003 Q144 Errorless Critical Thinking MCQ
Increasing order of electronegativity is
A.
Bi < P < S < Cl
B.
P < Bi < S < Cl
C.
S < Bi < P < Cl
D.
Cl < S < Bi < P
AMU 2002 Q145 Errorless Extended or Long Form of Periodic Table MCQ
Which of the following has smallest bond angle
A.
$H_{2}O$
B.
$NH_{3}$
C.
$CH_{4}$
D.
$CO_{2}$
AMU 2002 Q146 Errorless Extended or Long Form of Periodic Table MCQ
The metal-having highest melting point is
A.
Chromium
B.
Tungsten
C.
Diamond
D.
Silver
BHU 2002 Q147 Errorless Atomic and Ionic Radii MCQ
Which of the following is the correct order of ionic radii
A.
$F > Li > Na > K$
B.
$F > K > Na > Li$
C.
$Na > K > F > Li$
D.
$Li > Na > K > F$
KCET 2002 Q148 Errorless Atomic and Ionic Radii MCQ
Chloride ion and potassium ion are isoelectronic. Then
A.
Potassium ion is relatively bigger
B.
Depends on the other cation and anion
C.
Their size are same
D.
Chloride ion is bigger than potassium ion
CBSE PMT 2002; AFMC 2012 Q149 Errorless Ionisation Energy MCQ
Which of the following order is wrong
A.
$NH_{3} < PH_{3} < AsH_{3}$ -acidic nature
B.
$Li^{+} < Na^{+} < K^{+} < Cs^{+}$ -ionic radius
C.
$Al_{2}O_{3} < MgO < Na_{2}O < K_{2}O$ -basic
D.
Li < Be < B < C -1 $^{st}$ ionisation potential
KCET 2002 Q150 Errorless Valency and Oxidation State MCQ
Pentavalency in phosphorus is more stable when compared to that of nitrogen even though they belong to same group is due to
A.
Reactivity of phosphorus
B.
Inert nature of nitrogen
C.
Dissimilar electronic configuration
D.
Larger size of phosphorus atom