The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is
(a) Cr > Mn > V > Ti
(b) V > Mn > Cr > Ti
(c) Mn > Cr > Ti > V
(d) Ti > V > Cr > Mn

Concept Questions :-

Ionization Energy (IE)
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The sequence of ionic mobility in aqueous solution is

(a) K+>Na+>Rb+>Cs+

(b) Cs+>Rb+>K+>Na+

(c) Rb+>K+>Cs+>Na+

(d) Na+>K+>Rb+>Cs+

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Which one of the following arrangements does not give the correct picture of the trends indicated against it?

(a) F> Cl> Br> I:Oxidising power
(b) F2 < Cl2 > Br2 > I: Electron gain enthalpy
(c) F> Cl> Br> I: Bond dissociation energy
(d) F> Cl> Br> I2: Electronegativity

Concept Questions :-

Ionization Energy (IE)
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The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCOis:
(a) BeCO3 < MgCO3 < K2CO< CaCO3
(b) BeCO3 < MgCO3 < CaCO3 < K2CO3
(c) MgCO3 < BeCO3 < CaCO3 < K2CO3
(d) K2CO3 < MgCO3 < CaCO3 < BeCO3

Concept Questions :-

Stability of Compound
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In which of the following the hydration energy is higher than the lattice energy?

(a) BaSO4                           (b) MgSO4

(c) RaSO4                           (d) SrSO4

Concept Questions :-

Lattice/Hydration Energy
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With which of the following electronic configuration an atom has the lowest ionisation enthalpy?

(a) 1s22s22p5                 (b) 1s22s22p3

(c) 1s22s22p53s           (d) 1s22s22p6

Concept Questions :-

Ionization Energy (IE)
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Identify the correct order of the size of the following:

(a) Ca2+<K+<Ar<S2-<Cl-

(b) Ca2+<K+<Ar<Cl-<S2-

(c) Ar<Ca2+<K+<Cl-<S2-

(d) Ca2+<Ar<K+<Cl-<S2-

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The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of NH3 (1.5 D) is larger than that of NF3 (0.2 D). This is because:

(a) in NH3 as well as in NF3 the atomic dipole and bond dipole are in the same direction
(b) in NH3 the atomic dipole and bond dipole are in the same direction whereas in NFthese are in opposite directions
(c) in NH3 as well as NF3 the atomic dipole and bond dipole are in opposite directions
(d) in NH3 the atomic dipole and bond dipole are in the opposite directions whereas in NF3 these are in the same directions

Concept Questions :-

Electronegativity
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The correct order of the mobility of the alkali metal ions in aqueous solution is:
(a) Li+ > Na+ > K+ > Rb+

(b) Na+ > K+ >Rb+ >Li+

(c) K+ > Rb+ > Na+ > Li+

(d) Rb+ > K+ > Na+ > Li+

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An element whose IUPAC name is ununtrium(Uut) belong to:

(a) s-block element                                (b) p-block element

(c) d-block element                                (d) Transition element

Concept Questions :-

Modern Periodic Table
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