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question_answer1)
The correct sequence of increasing covalent character is represented by
A)
\[LiCl<NaCl<BeC{{l}_{2}}\] done
clear
B)
\[BeC{{l}_{2}}<NaCl<LiCl\] done
clear
C)
\[NaCl<LiCl<BeC{{l}_{2}}\] done
clear
D)
\[BeC{{l}_{2}}<LiCl<NaCl\] done
clear
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question_answer2)
Ionic radii are
A)
Directly proportional to effective nuclear charge done
clear
B)
Directly proportional to square of effective nuclear charge done
clear
C)
Inversely proportional to effective nuclear charge done
clear
D)
Inversely proportional to square of effective nuclear charge. done
clear
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question_answer3)
Which one of the following is expected to have largest size?
A)
\[{{F}^{-}}\] done
clear
B)
\[{{O}^{-2}}\] done
clear
C)
\[A{{I}^{+3}}\] done
clear
D)
\[{{N}^{-3}}\] done
clear
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question_answer4)
For C, N, O, and F, which of the following orders is correct for IP ?
A)
F>O>O>N done
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B)
O>F>N>C done
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C)
F>N>O>C done
clear
D)
N>F>O>C done
clear
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question_answer5)
Fluorine is the best oxidising agent because it has
A)
Highest electron affinity done
clear
B)
Highest \[{{E}^{0}}_{red}\] done
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C)
Highest \[{{E}^{0}}_{oxid}\], done
clear
D)
Lowest electron affinity done
clear
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question_answer6)
Among \[A{{l}_{2}}{{O}_{3}}\],\[Si{{O}_{2}}\]\[{{P}_{2}}{{O}_{3}}\] and \[S{{O}_{2}}\] the correct order of acid strength is
A)
\[A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<S{{O}_{2}}<{{P}_{2}}{{O}_{3}}\] done
clear
B)
\[Si{{O}_{2}}<S{{O}_{2}}<A{{l}_{2}}{{O}_{3}}<{{P}_{2}}{{O}_{3}}\] done
clear
C)
\[S{{O}_{2}}\]\[<{{P}_{2}}{{O}_{3}}\]\[<Si{{O}_{2}}\]\[<\]\[A{{l}_{2}}{{O}_{3}}\] done
clear
D)
\[A{{l}_{2}}{{O}_{3}}\]\[<Si{{O}_{2}}\]\[<{{P}_{2}}{{O}_{3}}\]\[<S{{O}_{2}}\] done
clear
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question_answer7)
In which of the following arrangements, the order is not correct according to the property indicated against it:
A)
Increasing size: \[A{{I}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] done
clear
B)
Increasing \[I{{E}_{1}}:B<C<N<O\] done
clear
C)
Increasing \[E{{A}_{1}}:I<Br<F<CI\] done
clear
D)
Increasing metallic radius: \[Li<Na<K<Rb\] done
clear
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question_answer8)
Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?
A)
\[A{{l}_{2}}{{O}_{3}}<MgO<N{{a}_{2}}O<{{K}_{2}}O\] done
clear
B)
\[Mg\,O\]\[<{{K}_{2}}O\]\[<\]\[A{{I}_{2}}{{O}_{3}}\]\[<N{{a}_{2}}O\] done
clear
C)
\[N{{a}_{2}}O\]\[<{{K}_{2}}O\]\[<MgO\]\[<\]\[A{{I}_{2}}{{O}_{3}}\] done
clear
D)
\[{{K}_{2}}O\]\[<N{{a}_{2}}O\]\[<\]\[A{{I}_{2}}{{O}_{3}}\]\[<MgO\] done
clear
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question_answer9)
Beryllium and aluminum exhibit many properties which are similar. But the two elements differ in:
A)
Exhibiting amphoteric nature in their oxides done
clear
B)
Forming polymeric hydrides done
clear
C)
Forming covalent halides done
clear
D)
Exhibiting maximum covalence in compounds done
clear
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question_answer10)
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species,\[{{K}^{+}},C{{a}^{2+}},M{{g}^{2+}}\] and \[B{{e}^{2+}}\]?
A)
\[M{{g}^{2+}}\]<\[B{{e}^{2+}}\]<\[{{K}^{+}}\]<\[C{{a}^{2+}}\] done
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B)
\[B{{e}^{2+}}\]<\[{{K}^{+}}\]<\[C{{a}^{2+}}\]<\[M{{g}^{2+}}\] done
clear
C)
\[{{K}^{+}}\]<\[C{{a}^{2+}}\]<\[M{{g}^{2+}}\]<\[B{{e}^{2+}}\] done
clear
D)
\[C{{a}^{2+}}\]<\[M{{g}^{2+}}\]<\[B{{e}^{2+}}\]<\[{{K}^{+}}\] done
clear
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question_answer11)
The ionic radii \[(in\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,)\] of \[{{N}^{3-}},{{O}^{2-}}\] and \[{{F}^{-}}\] are respectively:
A)
1.36, 1.40 and 1.71 done
clear
B)
1.36, 1.71 and 1.40 done
clear
C)
1.71, 1.40 and 1.36 done
clear
D)
1.71, 1.36 and 1.40 done
clear
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question_answer12)
The screening effect of d-electron is
A)
Equal to \[p\]-electron done
clear
B)
Much more. than \[p\]-electron done
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C)
Same as\[f\]-electrons done
clear
D)
Less than \[p\]-electrons done
clear
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question_answer13)
The size of species \[I,\text{ }{{I}^{\oplus }}\] and \[{{I}^{\Theta }}\] decreases in the order
A)
\[{{I}^{\oplus }}>{{I}^{\Theta }}>I\] done
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B)
\[{{I}^{\Theta }}>I>{{I}^{\oplus }}\] done
clear
C)
\[{{I}^{\Theta }}>{{I}^{\oplus }}>I\] done
clear
D)
\[I>{{I}^{\oplus }}>{{I}^{\Theta }}\] done
clear
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question_answer14)
The correct arrangement of decreasing order of atomic radius among Na, K, Mg and Rb is
A)
Rb>Na>K>Mg done
clear
B)
K>Rb>Na>Mg done
clear
C)
Rb>K>Na>Mg done
clear
D)
Mg>Rb>K>Na done
clear
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question_answer15)
In a given energy level, the order of penetration effect of different orbitals is
A)
f<d<p<s done
clear
B)
s=p=d=f done
clear
C)
s<p<d<f done
clear
D)
p>s>d>f done
clear
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question_answer16)
Which of the following is an energy consuming process?
A)
\[{{O}_{(g)}}+{{e}^{-}}\to {{O}^{\odot }}_{(g)}\] done
clear
B)
\[N{{a}^{\oplus }}_{(g)}+{{e}^{-}}\to N{{a}_{(g)}}\] done
clear
C)
\[{{O}^{\odot }}_{(g)}+{{e}^{-}}\to {{O}^{2-}}_{(g)}\] done
clear
D)
\[{{O}^{2-}}_{(g)}\to {{O}^{\odot }}+{{e}^{-}}\] done
clear
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question_answer17)
Which of the following are isoelectronic species? \[\overset{\oplus }{\mathop{C{{H}_{3}}}}\,(I),\text{ }\overset{\Theta }{\mathop{N{{H}_{2}}}}\,(II),\text{ }{{\overset{\oplus }{\mathop{NH}}\,}_{4}}(III)\,\,and\,\text{ }N{{H}_{3}}(IV)\]
A)
II, III and IV done
clear
B)
I, II and III done
clear
C)
I, II and IV done
clear
D)
II and I done
clear
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question_answer18)
\[I{{E}_{1}}\] and \[I{{E}_{2}}\] of Mg are 178 and 348 kcal \[mo{{l}^{\,-\,1}}\]. The energy required for the reaction \[Mg\xrightarrow{{}}M{{g}^{2+}}+2\,\,{{e}^{-}}\] is
A)
+170 kcal done
clear
B)
+526 kcal done
clear
C)
-170 kcal done
clear
D)
-526 kcal done
clear
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question_answer19)
Second and successive electron affinity of an element
A)
is always successive (energy is released) done
clear
B)
is always positive (energy is absorbed) done
clear
C)
can be positive or negative done
clear
D)
is always zero done
clear
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question_answer20)
Choose the correct decreasing order of thermal stability of the following.
A)
Be\[C{{O}_{3}}\] > Mg\[C{{O}_{3}}\] > Ca\[C{{O}_{3}}\] > Ba\[C{{O}_{3}}\] done
clear
B)
Ba\[C{{O}_{3}}\] > Ca\[C{{O}_{3}}\] > Mg\[C{{O}_{3}}\] > Be\[C{{O}_{3}}\] done
clear
C)
Be\[C{{O}_{3}}\] > Ca\[C{{O}_{3}}\] > Ba\[C{{O}_{3}}\] > Mg\[C{{O}_{3}}\] done
clear
D)
Mg\[C{{O}_{3}}\] > Ca\[C{{O}_{3}}\] > Ba\[C{{O}_{3}}\] > Be\[C{{O}_{3}}\] done
clear
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question_answer21)
Calculate the amount of energy required (in terms of \[{{10}^{6}}\]j) to convert 5 moles of sodium atom in the gaseous state to form sodium ion to the nearest possible integer. Lonisation enthalpy of Na=51 eV/atom.
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question_answer22)
How many elements are possible for 1 st period of periodic table if azimuthal quantum number can have integral values from0 , 1, 2... \[(n+1)\]?
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question_answer23)
Calculate the electronegativity of fluorine from the following data:
\[{{E}_{H-H}}=104.2\,kcal\,mo{{l}^{-1}}\] |
\[{{E}_{F-F}}=36.6\,kcal\,mo{{l}^{-1}}\] |
\[{{E}_{H-F}}=134.6\,kcal\,mo{{l}^{-1}}\] |
\[{{X}_{H}}=2.1\] |
Express your answer to the nearest possible integral.
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question_answer24)
From the given compounds if X number of compounds are acidic in water.\[CaO,S{{O}_{2,}}S{{O}_{3}},F{{e}_{2}}{{O}_{3}},C{{l}_{2}}{{O}_{7}},C{{O}_{2}},N{{a}_{2}}O\] Find the value of X.
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question_answer25)
Calculate the effective nuclear charge to the nearest possible integer, at the periphery of nitrogen atom when an extra electron is added in the formation of anion.
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