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Classification of Elements and Periodicity in Properties

571 Questions Start Errorless Test
All Exams Errorless Allen
BHU 2006 Q126 Errorless Atomic and Ionic radii MCQ
The ionic radii (ƅ) of $C^{4-}$ and $O^{2-}$ respectively are 2.60 and 1.40. The ionic radius of the isoelectronic ion $N^{3-}$ would be
A.
2.6
B.
1.71
C.
1.4
D.
0.95
2006 Q127 Errorless Ionisation Energy MCQ
The increasing order of the first ionisation enthalpies of the elements B, P, S and F (lowest first) is [a] IEEE 2006; AFMC 2012]
A.
F < S < P < B
B.
P < S < B < F
C.
B < P < S < F
D.
B < S < P < F
Kerala PET 2006 Q128 Errorless Ionisation Energy MCQ
The successive ionisation energy values for an element $X$ are given below A. $1^{\mathrm{st}}$ ionisation energy $= 410 \mathrm{~kJ} \mathrm{mol}^{-1}$ B. $2^{\mathrm{nd}}$ ionisation energy $= 820 \mathrm{~kJ} \mathrm{mol}^{-1}$ C. $3^{\mathrm{rd}}$ ionisation energy $= 1100 \mathrm{~kJ} \mathrm{mol}^{-1}$ D. $4^{\mathrm{th}}$ ionisation energy $= 1500 \mathrm{~kJ} \mathrm{mol}^{-1}$ E. $5^{\mathrm{th}}$ ionisation energy $= 3200 \mathrm{~kJ} \mathrm{mol}^{-1}$ Find out the number of valence electron for the atom, X
A.
4
B.
3
C.
5
D.
2
E.
1
Kerala PMT 2006 Q129 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 Q130 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.
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 Q131 Errorless Electron affinity MCQ
Which of the following species has the highest electron affinity
A.
$F^{-}$
B.
O
C.
$O^{-}$
D.
$Na^{+}$
RPMT 2006 Q132 Errorless Electronegativity MCQ
Which of the following is a false statement
A.
Fluorine is more electronegative than chlorine
B.
Nitrogen has greater $IE_{1}$ than oxygen
C.
Lithium is amphoteric
D.
Chlorine is an oxidising agent
J & K CET 2006 Q133 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.
$X_{A} - X_{B} = \sqrt{\Delta}$
RPMT 2006 Q134 Errorless Valency and oxidation state MCQ
Which of the following element shows maximum valency
A.
Carbon
B.
Barium
C.
Nitrogen
D.
Sulphur
RPMT 2006 Q135 Errorless Valency and oxidation state MCQ
Fluorine is the best oxidising agent because it has
A.
Highest electron affinity
B.
Highest $E_{\mathrm{red}}^{\circ}$
C.
Highest $E_{\mathrm{oxid}}^{\circ}$
D.
Lowest electron affinity
Odisha JEE 2005 Q136 Errorless Ionisation Energy MCQ
Ionisation energy in group I-A varies in the decreasing order as
A.
$Li > Na > K > Cs$
B.
$Na > Li > K > Cs$
C.
$Li > Cs > K > Na$
D.
$K > Cs > Na > Li$
AIIMS 2005 Q137 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.
RPMT 2005 Q138 Errorless Electron affinity MCQ
The electron affinity of $Be$ is similar to
A.
He
B.
B
C.
Li
D.
Na
RPMT 2005 Q139 Errorless Electronegativity MCQ
The most polar bond is
A.
$O - F$
B.
$N - Cl$
C.
$N - F$
D.
$N - N$
AIIMS 2005 Q140 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 Q141 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 Q142 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 Q143 Errorless Critical Thinking MCQ
Which of the following oxides is amphoteric in character
A.
CaO
B.
$\mathsf{CO}_{2}$
C.
$\mathsf{SiO}_2$
D.
$\mathsf{SnO}_2$
KCET 2004; AFMC 2012 Q144 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 Q145 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 Q146 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 Q147 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
Odisha JEE 2004 Q148 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 Q149 Errorless Ionisation Energy MCQ
Which of the following has the highest first ionisation energy
A.
Li
B.
Be
C.
B
D.
C
CPMT 2004 Q150 Errorless Ionisation Energy MCQ
Flourine is the best oxidising agent because it has
A.
Highest electron affinity
B.
Highest $E_{red}^{o}$
C.
Highest $E_{oxid}^{o}$
D.
Lowest electron affinity