Cis-butene dioic acid ⇌ K a 1 { - H + } X - 1 ⇌ K a 2 { - H + } X 2 2 - Trans-butene dioic acid ⇌ K a 1 ' { - H + } Y - 1 ⇌ K a 2 · { - H + } Y 2 2 - The incorrect statement regarding above the information is:

X 1 - species is more basic than Y 1 - species

X 2 2 - species is more basic than Y 2 2 - species

K ' a 2 is greater than K ' a 2

Chemistry - Chemical Bonding Molecular Structure - Quiz-8

Which of the following orbital can not form $π$ as well as $δ$ -bond?

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$d_{x y}$ (2) $d_{z^{2}}$
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2
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$d_{x^{2} - y^{2}}$ (4) $d_{y z}$
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4

Give the correct order of initials T and F for following statements. use T if statement is true and F if it is false :

(a) The order of repulsion betweeen different pair of electrons is $l_{p} - l_{p} > l_{p} - b_{p} > b_{p} - b_{p}$

(b) In general , as the number of lone pair of electrons on central atom increases, value of bond angle from normal bond angle also increases

(d) The structure of xeon fluorides and xenon oxyfluorides could not be explained on the basis of VSEPR

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TTTF
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TFTF
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TFTT
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TFFF

Which species is planar?

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() $C {O_{3}}^{2 -}$
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() $S {O_{3}}^{2 -}$
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() $C l {O_{3}}^{-}$
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() $B {F_{4}}^{-}$

On the left are given decreasing orders of elements for a certain property and on right side is given the property. The incorrect order for the given properties is:

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${AlF}_{3} > MgO > {MgF}_{2}$ : Lattice energy
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$Li > Na > Al > Mg$ : Electron affinity
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${PF}_{5} > {SF}_{6} > {SiF}_{4}$ : Lewis acidic character
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${SiCl}_{4} > {SiBr}_{4} > {SiI}_{4}$ : Decreasing ionic character

What is the shape of the $I B {r_{2}}^{-}$ ion ?

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Linear
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Bent shape with bond angle of about $90 °$
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Bent shape with bond angle of about $109 °$
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Bent shape with bond angle of about $120 °$

What is the shape of the $C l F_{3}$ molecule?

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Trigonal planar
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Trigonal pyramid
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T-shaped
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Tetrahedral

Which of the following compound has the smallest bond angle (X $—$ A $—$ Z) in each series respectively?

Options are as follows:

(a) $O S F_{2}, S b C l a n d P I_{3}$ (b) $O S B r_{2}, S B I_{3} a n d P I_{3}$

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$O S F_{2} O S C l_{2}$ $O S B r_{2}$
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$S b C l_{3}$ $S b B r_{3}$ $S b I_{3}$
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$P I_{3}$ $A s I_{3}$ $S b I_{3}$
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(c) $O S F_{2}, S B I_{3} a n d P I_{3}$
$O S F_{2}, S B C l_{3} a n d S B I_{3}$

According to VSEPR theory in, which species do all the atoms lie in the same plane?

1. $C {H_{3}}^{+}$ 2. $C {H_{3}}^{-}$

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(3) both 1 nd 2
(4) neither 1 nor 2
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(1) 1 only&nsp;
(2) 2 only
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3
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4

Idetify the correct sequence of increasing number of $π$ bonds in the structure of the following molecules :

(I) $H_{2} S_{2} O_{6}$ (II) $H_{2} S_{} O_{3}$ (III) $H_{2} S_{2} O_{5}$

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I II and III 2. II I and III
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2
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II III and I 4. I III and II
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4

The state of hybridisation of central atom in dimer of $B H_{3}$ and $B e H_{2}$ is:

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$s p^{2}, s p^{2}$
(2) $s p^{3}, s p^{2}$
(3) $s p^{3}, s p^{3}$
(4) $s p^{2}, s p^{3}$
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2
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3
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4

Which of the following species/molecules does not have same number of bond pairs and lone pairs?

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$O C N^{-}$
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$H_{2} O$
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$C_{2} H_{2} C l_{2}$
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$O_{3}$

O $—$ O bond length ( $in \overset{°}{A}$ ) in $H_{2} O_{2}$ and $O_{2} F_{2}$ is respectively:

2. 1.48 , 1.22

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1.22 , 1.48
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3. 1.22 , 1.22
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3
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1.48 , 1.48

In which of the following compounds B $—$ F bond length is shortest ?

(a) $B {F_{4}}^{-}$ (b) $B F_{3} \leftarrow N H_{3}$

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1
0%
2
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3
0%
4

In terms of polar character which of the following order is correct?

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$N H_{3} < H_{2} O < H F < H_{2} S$
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$H_{2} S < N H_{3} < H_{2} O < H F$
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$H_{2} O < N H_{3} < H_{2} S < H F$
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$H F < H_{2} O < N H_{3} < H_{2} S$

The correct order of boiling point among the following is:

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$T_{2} < D_{2} < H_{2}$
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n-pentane<neo pentane
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Xe<Ar<He
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m-nitrophenol>o-nitrophenol

The correct order of 'S $—$ O' bond length is:

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${SO}_{3}^{2 -} > {SO}_{4}^{2 -} > {SO}_{3} > {SO}_{2}$
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${SO}_{3}^{2 -} > {SO}_{4}^{2 -} > {SO}_{2} > {SO}_{3}$
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${SO}_{4}^{2 -} > {SO}_{3}^{2 -} > {SO}_{2} > {SO}_{3}$
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${SO}_{4}^{2 -} > {SO}_{3}^{2 -} > {SO}_{3} > {SO}_{2}$

The linear structure is possessed by :

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$S n C l_{2}$
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$N C O^{-}$
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$N {O_{2}}^{+}$
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$C S_{^{2}}$

Cis-butene dioic acid $\overset{K_{a_{1}} {- H^{+}}}{⇌} {X^{-}}_{1} \overset{K_{a_{2}} {- H^{+}}}{⇌} X_{2}^{2 -}$

Trans-butene dioic acid $\overset{K_{a_{1}}' {- H^{+}}}{⇌} {Y^{-}}_{1} \overset{K_{a_{2}} \cdot {- H^{+}}}{⇌} Y_{2}^{2 -}$

The incorrect statement regarding above the information is:

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$X_{2}^{2 -}$ species is more basic than $Y_{2}^{2 -}$ species
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$X_{1}^{-}$ species is more basic than $Y_{1}^{-}$ species
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$K_{a 1}$ is greater than $K'_{a 2}$
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$K'_{a 2}$ is greater than $K'_{a 2}$

In which of the following compounds octet is complete and incomplete for all atoms:

${Al}_{2} {Cl}_{6} {Al}_{2} {({CH}_{3})}_{6} {AlF}_{3} Dimer of {BeCl}_{2} Dimer of {BeH}_{2}$

where C denotes Complete and IC incomplete.

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IC IC IC C C
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C IC IC C IC
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C IC C IC IC
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IC C IC IC IC

A compound having a metal-to-metal bond is:

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Cupric chloride
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Stannous chloride
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Mercurous chloride
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Mercuric chloride

Which of the following pair of elements can form an ionic compound?

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Na and Ca
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K and $O_{2}$
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$O_{2}$ and ${Cl}_{2}$
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$Al and I_{2}$

The type of molecular forces of attraction present in the following compound is:

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Intermolecular H-bonding .
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Intramolecular H-bonding.
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Van der Waal's force.
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All of the above.

The species showing $p π$ - $d π$ overlapping is :

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$N {O_{3}}^{-}$
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$P {O_{4}}^{3 -}$
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$C {O_{3}}^{2 -}$
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$N {O_{2}}^{-}$

Which of the following interaction lies in the range of 8 - 42 kJ/mol?

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$H_{2} . . . H_{2} O$
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HCl...HCI
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$H_{2} O$ ...HF
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all

The number of antibonding electrons pairs in ${O_{2}}^{2 -}$ on the basis of MO theory are:

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4
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3
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2
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5

If ${CdI}_{2}$ is pink in colour, the ${CdCl}_{2}$ will be '.............' coloured.

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yellow
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red
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blue
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cannot be predicted

Which are true statements among the following?

(3) Electrons travel with speed of light

(4) $S e F_{4}$ and $C H_{4}$ has same charge on central atom

(5) ${I_{3}}^{+}$ has bent geometry

(b) 1,2,5

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$P H_{5}$ and $B i C l_{5}$ does not exist
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$p π$ - $d π$ bonds are present in $S O_{2}$
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(a) 1,3
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(d) 1,2,4

In which molecule all atoms are coplanar?

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$C H_{4}$
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$B F_{3}$
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$P F_{3}$
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$N H_{3}$

Among the following Which is paramagnetic ?

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$C l_{2} O_{6}$
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$C l_{2} O_{7}$
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$C l_{2} O$
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$C l O_{2}$

The correct statement among the following for a compound having a higher dipole moment is-

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Greater will the ionic nature.
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Lesser will be the polarity.
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Smaller will be the ionic nature.
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None of the above.

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Practice Chemistry Quiz Questions and Answers

0:0:1

Practice Chemistry Quiz Questions and Answers

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