question_answer 1)
Two elements X and Y have following electronic Configurations
\[X:1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{2}}\,3{{s}^{2}}\,3{{p}^{6}}4{{s}^{2}}\]
\[Y:1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{5}}\]
The expected compound formed by combination of X and Y will be expressed as
A)
\[X{{Y}_{2}}\] done
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B)
\[{{X}_{5}}{{Y}_{2}}\] done
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C)
\[{{X}_{2}}{{Y}_{5}}\] done
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D)
\[{{X}_{{}}}{{Y}_{5}}\] done
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question_answer 2)
The compound which contains both covalent and co-ordinate bond is
A)
\[{{C}_{2}}{{H}_{5}}NC\] done
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B)
\[{{C}_{2}}{{H}_{5}}CN\] done
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C)
\[HCN\] done
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D)
None of these done
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question_answer 3)
Which of the following Lewis structure does not contribute in resonance?
A)
I done
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B)
II done
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C)
III done
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D)
IV done
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question_answer 4)
The correct statement for the molecule \[Cs{{I}_{3}}\] is
A)
It is a covalent molecule done
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B)
It contains \[C{{s}^{+}}\] and \[{{I}^{-}}_{3}\] done
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C)
It contains \[C{{s}^{3+}}\] and \[{{I}^{-}}\] ions done
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D)
It contains \[C{{s}^{+}}\],\[{{I}^{-}}\] and lattice \[{{I}^{{}}}_{2}\] molecule done
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question_answer 5)
Out of the following which has highest dipole moment?
A)
2,2-dimethyl propane done
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B)
trans-2-pentene done
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C)
cis-3-hexene done
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D)
2,2,3,3-tetramethyl butane done
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question_answer 6)
Which of the following have distorted octahedral structure?
A)
\[S{{F}_{6}}\] done
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B)
\[P{{F}^{\odot }}_{6}\] done
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C)
\[Si{{F}^{2-}}_{6}\] done
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D)
\[Xe{{F}_{6}}\] done
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question_answer 7)
The statement true for azide ion (\[{{N}_{3}}^{\odot }\]) is
A)
It has a non-linear structure done
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B)
It is called pseudo halogens done
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C)
The formal oxidation state of N in this anion I -1 done
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D)
It is isoelectronic with \[N{{O}_{2}}\] done
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question_answer 8)
\[{{H}_{2}}O\] is dipolar, whereas \[Be{{F}_{2}}\] is not. It I because
A)
The electronegativity of F is greater than that of 0 done
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B)
\[{{H}_{2}}O\] involves hydrogen bonding whereas \[Be{{F}_{2}}\] is a discrete molecule done
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C)
\[{{H}_{2}}O\] is linear and \[Be{{F}_{2}}\] is angular done
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D)
\[{{H}_{2}}O\] is angular and \[Be{{F}_{2}}\] is linear done
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question_answer 9)
The electronegativity difference between N and F is greater than that between N and H, yet the dipole moment of \[N{{H}_{3}}\] (1.5 D) is larger than that of \[N{{F}_{3}}\] (0.2 D). This is because
A)
In \[N{{H}_{3}}\] the atomic dipole and bond dipole are in the same direction, whereas in \[N{{F}_{3}}\] these are in opposite directions done
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B)
In \[N{{H}_{3}}\] as well as \[N{{F}_{3}}\] the atomic dipole and bond dipole are in opposite directions done
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C)
In \[N{{H}_{3}}\] the atomic dipole and bond dipole are in the opposite directions, whereas in\[N{{F}_{3}}\]? 3 these are in the same direction done
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D)
In \[N{{H}_{3}}\] as well as in\[N{{F}_{3}}\] the atomic dipole and bond dipole are in the same direction done
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question_answer 10)
In which of the following molecules/ions\[B{{F}_{3}}\],\[N{{O}^{-}}_{2}\] \[N{{H}^{-}}_{2}\], and \[{{H}_{2}}O\] the central atom is \[s{{p}^{2}}_{}\] hybridized?
A)
\[B{{F}_{3}}\]and \[N{{O}^{-}}_{2}\] done
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B)
\[N{{O}^{-}}_{2}\]and \[N{{H}^{-}}_{2}\] done
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C)
\[N{{H}^{-}}_{2}\]and \[{{H}_{2}}O\] done
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D)
\[N{{O}^{-}}_{2}\]and \[{{H}_{2}}O\] done
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question_answer 11)
In which of the following pairs bond angle is\[109{}^\circ 28'\]?
A)
\[[N{{H}^{+}}_{4}],[B{{F}^{-}}_{4}]\] done
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B)
\[N{{H}^{+}}_{4}\],\[[B{{F}_{3}}]\] done
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C)
\[B{{H}_{2}}^{-}\][\[B{{F}^{-}}_{4}\]] done
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D)
\[[N{{H}^{{}}}_{3}]\],\[B{{F}^{{}}}_{3}\] done
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question_answer 12)
Which one of the following species is diamagnetic in nature?
A)
\[H{{e}^{+}}_{2}\] done
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B)
\[{{H}_{2}}\] done
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C)
\[{{H}^{+}}_{2}\] done
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D)
\[{{H}^{-}}_{2}\] done
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question_answer 13)
In which of the following ionization processes, the bond order has increased and the magnetic behavior has changed?
A)
\[{{C}_{2}}\to {{C}^{+}}_{2}\] done
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B)
\[NO\to N{{O}^{+}}\] done
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C)
\[{{O}_{2}}\to {{O}^{+}}_{2}\] done
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D)
\[{{N}_{2}}\to {{N}^{+}}_{2}\] done
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question_answer 14)
In which of the following pairs, the two species are not isostructural?
A)
\[C{{O}^{2-}}_{3}\,and\,N{{O}^{-}}_{3}\] done
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B)
\[PC{{l}^{+}}_{4}\,and\,SiC{{l}^{{}}}_{4}\] done
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C)
\[P{{F}_{5}}\,and\,Br{{F}_{5}}\] done
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D)
\[Al{{F}^{3-}}_{6}\,and\,S{{F}_{5}}\] done
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question_answer 15)
Which one of the following constitutes a group of the isoelectronic species?
A)
\[{{C}^{2-}}_{2},{{O}^{-}}_{2}CO,NO\] done
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B)
\[N{{O}^{+}}\],\[{{C}^{2-}}_{2},\]\[C{{N}^{-}},\]\[{{N}_{2}}\] done
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C)
\[C{{N}^{-}},\]\[{{N}_{2}}\],\[{{O}^{2-}}_{2},\]\[{{C}^{2-}}_{2},\] done
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D)
\[N{{O}_{2}}\],\[{{O}_{2}}\],\[N{{O}^{+}}\],\[CO\] done
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question_answer 16)
Specify the coordination geometry around and hybridization Of N and B atoms in a 1 : 1 complex of \[B{{F}_{3}}\] and \[N{{H}_{3}}\]:
A)
N: tetrahedral, \[s{{p}^{3}}\], B: tetrahedral, \[s{{p}^{3}}\] done
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B)
N: pyramidal, \[s{{p}^{3}}\]', B: pyramidal, \[s{{p}^{3}}\] done
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C)
N: pyramidal, \[s{{p}^{3}}\], B: planar, \[s{{p}^{2}}\] done
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D)
N: pyramidal, \[s{{p}^{3}}\], B: tetrahedral, \[s{{p}^{3}}\] done
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question_answer 17)
Which of the following diatomic molecules would be stabilised by the removal of an electron?
A)
\[{{O}_{2}}\] done
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B)
\[C{{N}^{\odot }}\] done
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C)
\[{{N}_{2}}\] done
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D)
\[{{C}_{2}}\] done
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question_answer 18)
Which of the following statements is correct for CO?
A)
A double bond between C and 0 atoms done
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B)
\[1\sigma \], \[1\pi \]In and 1 coordinate bond between C and 0 atoms done
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C)
One lone pair of electrons on each atom done
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D)
\[1\sigma \],\[2\pi \] bonds between C and 0 atoms done
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question_answer 19)
\[As{{F}_{5}}\] molecule is \[s{{p}^{3}}\]d hybridised and is trigonal bipyramidal (Tbp) shape. Which J-orbital is involved in \[s{{p}^{3}}\]d hybridisation.
A)
\[d{{x}^{2}}-{{y}^{2}}\] done
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B)
\[d{{z}^{2}}\] done
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C)
\[dxy\] done
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D)
\[dzx\] done
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question_answer 20)
Which of the following have been arranged in increasing bond order as well as bond dissociation energy?
A)
\[{{O}_{2}}^{-2}<{{O}_{2}}^{\odot }<{{O}^{\oplus }}_{2}<{{O}_{2}}\] done
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B)
\[{{O}_{2}}^{-2}<{{O}_{2}}^{\odot }<{{O}_{2}}<{{O}_{2}}\] done
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C)
\[{{O}_{2}}\]\[<{{O}^{\oplus }}_{2}\]\[<\]\[{{O}_{2}}^{2-}\]\[<{{O}_{2}}^{\odot }\] done
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D)
\[{{O}^{\oplus }}_{2}\]\[<\]\[{{O}_{2}}^{2-}\]\[<{{O}_{2}}^{\odot }\]\[<{{O}_{2}}\] done
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question_answer 21)
An ionic bond is established between a positive ion \[{{A}^{+}}\] and negative ion\[{{B}^{-}}\]. How many times strength of the ionic bond is affected by doubling the charge on \[{{A}^{+}}\] and making the radius halved?
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question_answer 22)
Find out number of \[P\]-orbitals of boron atom which participate in hybridisation in \[{{B}_{2}}{{H}_{6}}\] (number of\[p\]-orbitals taking part in hybridisation per atom of boron).
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question_answer 23)
\[A{{X}_{4}}\] Forms square planar type structure. Distance between A and X-atoms is 4 units. What is distance between two X-atoms in trans-position?
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question_answer 24)
At 300 K and 1.00 atm, density of gaseous HF is 3.17\[g{{L}^{-1}}\]. How many HF molecules are associated by H-bonding?
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question_answer 25)
Based on VSEPR theory, the number of 90 degree F-Br-F angles in \[Br{{F}_{5}}\]is
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