← Back to Chemistry-I

Classification of Elements and Periodicity in Properties

301 Questions Start Errorless Test
All Exams Errorless
Kerala PET 2008 Q101 Errorless Ionisation Energy MCQ
The first ionisation energy of oxygen is less than that of nitrogen. Which of the following is the correct reason for this observation
A.
Lesser effective nuclear charge of oxygen than nitrogen
B.
Lesser atomic size of oxygen than nitrogen
C.
Greater inter-electron repulsion between two electrons in the same p orbital counter balances the increase in effective nuclear charge on moving from nitrogen to oxygen
KCET 2008 Q102 Errorless Ionisation Energy MCQ
The correct order in which the first ionisation potential increases is
A.
$K, Be, Na$
B.
$Be, Na, K$
C.
$Na, K, Be$
D.
$K, Na, Be$
Kerala PMT 2008 Q103 Errorless Critical Thinking MCQ
Which two elements in the periodic table would you expect to combine in the most violent fashion
A.
H and O
B.
Cl and F
C.
Mg and N
D.
P and O
E.
Cs and F
CBSE PMT 2007; CBSE PMT (Pre.) 2010; WB JEE 2012 Q104 Errorless Atomic and Ionic Radii MCQ
Identify the correct order of the size of the following
A.
$Ca^{2+} < K^{+} < Ar < S^{2-} < Cl^{-}$
B.
$Ca^{2+} < K^{+} < Ar < Cl^{-} < S^{2-}$
C.
$Ar < Ca^{2+} < K^{+} < Cl^{-} < S^{2-}$
D.
$Ca^{2+} < Ar < K^{+} < Cl^{-} < S^{2-}$
UPCPMT 2007 Q105 Errorless Atomic and Ionic Radii MCQ
Difference between $S$ and $S^{2-}$ as $S^{2-}$ has
A.
Larger radii and large size
B.
Smaller radii and large size
C.
Larger radii and small size
D.
Smaller radii and small size
CBSE PMT 2007 Q106 Errorless Ionisation Energy MCQ
With which of the following electronic configuration an atom has the lowest ionisation enthalpy
A.
$1s^{2}2s^{2}2p^{5}$
B.
$1s^{2}2s^{2}2p^{3}$
C.
$1s^{2}2s^{2}2p^{5}3s^{1}$
D.
$1s^{2}2s^{2}2p^{6}$
CBSE PMT 2007 Q107 Errorless Electron Affinity MCQ
Which one of the following ionic species has the greatest proton affinity to form stable compound
A.
$HS^{-}$
B.
$NH_{2}^{-}$
C.
$F^{-}$
D.
$I^{-}$
AIEEE 2006 Q108 Errorless Extended or Long Form of Periodic Table MCQ
Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture
A.
The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group
B.
In both alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group
C.
Chemical reactivity increase with increase in atomic number down the group in both the alkali metals and halogens
D.
In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group
AIEEE 2006; AFMC 2012 Q109 Errorless Ionisation Energy MCQ
The increasing order of the first ionisation enthalpies of the elements $B, P, S$ and $F$ (lowest first) is
A.
$F < S < P < B$
B.
$P < S < B < F$
C.
$B < P < S < F$
D.
$B < S < P < F$
Kerala PMT 2006 Q110 Errorless Ionisation Energy MCQ
Among the following transition elements, pick out the element / elements with highest second ionisation energy
(A) V (At. no = 23) (B) Cr (At. no. = 24)
(C) Mn (At. no = 25) (D) Cu (At. no = 29)
(E) Zn (At. no = 30)
A.
A and C
B.
B and D
C.
B and E
D.
Only D
E.
Only C
AIIMS 2006 Q111 Errorless Ionisation Energy MCQ
Assertion : $E^{o}$ for $Mn^{3+}/Mn^{2+}$ is more positive than $Cr^{3+}/Cr^{2+}$ . Reason : The third ionisation energy of Mn is larger than that of Cr.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
DCE 2006; AFMC 2010 Q112 Errorless Electron Affinity MCQ
Which of the following species has the highest electron affinity
A.
$F^{-}$
B.
O
C.
$O^{-}$
D.
$Na^{+}$
J & K CET 2006 Q113 Errorless Electronegativity MCQ
Pauling's equation for determining the electronegativity of an element is
A.
$X_{A}-X_{B}=0.208\sqrt{\Delta}$
B.
$X_{A}+X_{B}=0.208\sqrt{\Delta}$
C.
$X_{A}-X_{B}=0.208\Delta^{2}$
D.
$X_{A}-X_{B}=\sqrt{\Delta}$
CBSE PMT 2005, 04 Q114 Errorless Atomic and Ionic Radii MCQ
Ionic radii are
A.
Directly proportional to effective nuclear charge
B.
Directly proportional to square of effective nuclear charge
C.
Inversely proportional to effective nuclear charge
D.
Inversely proportional to square of effective nuclear charge
AIIMS 2005 Q115 Errorless Ionisation Energy MCQ
Assertion : First ionisation energy for nitrogen is lower than oxygen. Reason : Across a period effective nuclear charge decreases.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
CBSE PMT 2005; CBSE PMT (Pre.) 2010 Q116 Errorless Electron Affinity MCQ
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species
A.
Cl < F < S < O
B.
O < S < F < Cl
C.
S < O < Cl < F
D.
F < Cl < O < S
AIIMS 2005 Q117 Errorless Critical Thinking MCQ
The pair of amphoteric hydroxides is
A.
$Al(OH)_{3}$ , LiOH
B.
$Be(OH)_{2}$ , $Mg(OH)_{2}$
C.
$B(OH)_{3}$ , $Be(OH)_{2}$
D.
$Be(OH)_{2}$ , $Zn(OH)_{2}$
BHU 2005 Q118 Errorless Critical Thinking MCQ
What will be the order of I $^{st}$ ionisation energy
A.
Li > Na > K
B.
K > Li > Na
C.
Na > Li > K
D.
Li > K > Na
AIEEE 2005, JEE (Main) Jan. 2025 Q119 Errorless Critical Thinking MCQ
In which of the following arrangements the order is NOT according to the property indicated against it
A.
$Al^{3+} < Mg^{2+} < Na^{+} < F^{-}$ : Increasing ionic size
B.
$B < C < N < O$ : Increasing first ionisation enthalpy
C.
$I < Br < F < Cl$ : Increasing electron gain enthalpy (with negative sign)
D.
Li < Na < K < Rb : Increasing metallic radius
AIEEE 2005 Q120 Errorless Critical Thinking MCQ
Which of the following oxides is amphoteric in character
A.
CaO
B.
$\mathrm{CO}_{2}$
C.
$\mathrm{SiO}_2$
D.
$\mathrm{SnO}_2$
Odisha JEE 2005; JEE (Main) Sep. 2020, Jul. 2021, Aug. 2021, June 2022, Jan. 2023 Q121 Errorless Latest Trend MCQ
The correct increasing order of the ionic radii is
A.
$Cl^{-} < Ca^{2+} < K^{+} < S^{2-}$
B.
$K^{+} < S^{2-} < Ca^{2+} < Cl^{-}$
C.
$S^{2-} < Cl^{-} < Ca^{2+} < K^{+}$
D.
$Ca^{2+} < K^{+} < Cl^{-} < S^{2-}$
KCET 2004; AFMC 2012 Q122 Errorless Extended or Long Form of Periodic Table MCQ
The elements with atomic numbers 9, 17, 35, 53, 85 are all
A.
Noble gases
B.
Halogens
C.
Heavy metals
D.
Light metals
DPMT 2004 Q123 Errorless Atomic and Ionic Radii MCQ
Which of the following alkali metal ions has lowest ionic mobility in aqueous solutions
A.
$Rb^{+}$
B.
$Cs^{+}$
C.
$Li^{+}$
D.
$Na^{+}$
Pb.PMT 2004 Q124 Errorless Atomic and Ionic Radii MCQ
The trivalent ion having largest size in lanthanide series is
A.
Ti
B.
Zr
C.
Hf
D.
La
Odisha JEE 2004 Q125 Errorless Atomic and Ionic Radii MCQ
Correct energy value order is
A.
ns np nd(n-1)f
B.
ns np(n-1)d (n-2)f
C.
ns np(n-1)d (n-1)f
D.
ns(n-1)d n(n-1)f