Chemistry - Chemical Bonding Molecular Structure - Quiz-2 - MCQExams.com

In an octahedral structure, the pair of d orbitals involved in d²sp³-hybridisation is

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$d_{x^{2} - y^{2}}, d_{z^{2}}$
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$d_{x y}, d_{x^{2} - y^{2}}$
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$d_{z^{2}}, d_{x z}$
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$d_{x y}, d_{y z}$

Equilateral shape has

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sp hybridisation
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sp² hybridisation
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sp³ hybridisation
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dsp² hybridisation

AsF₅ molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are

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$d_{x^{2} - y^{2}}, d_{z^{2}}, s, p_{x}, p_{y}$
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$d_{x y}, s, p_{x}, p_{y}, p_{z}$
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$s, p_{x}, p_{y}, p_{z}, d_{x y}$
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$d_{z^{2}}, s, p_{x}, p_{y}, p_{z}$

The types of hybrid orbitals of nitrogen in NO₂⁺, NO₃^- and NH₄⁺ respectively are expected to be

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sp, sp³ and sp²
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sp, sp² and sp³
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sp², sp and sp³
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sp², sp³ and sp

Which of the following statement is not correct from the view point of molecular orbital theory ?

s2s < s*2s < s2p_z < (p2p_x=p2p_y) < (p*2p_x=p*2p_y) < s*2p_z

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Be₂ is not a stable molecule
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He₂ is not a stable but He_2⁺ is expected to exist.
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Bond strength of N₂ is maximum amongst the homonuclear diatomic molecules belonging to the second period.
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The order of energies of molecular orbitals in N₂ molecule is

Compound that does not exhibit hydrogen bonding is-

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${CH}_{3} {CH}_{2} OH$
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PCl₅ is highly unstable and in a solid-state, it exists as into [PCl₄]⁺and [PCl₆]^-ions.

The geometry of [PCl₆]^- is

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Octahedral
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Tetrahedral
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Square pyramidal
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Square planar

Which of the following species has maximum number of lone-pair of electrons on the central atom ?

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XeF₂
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H₃O⁺
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XeF₄
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XeF₆

Which is the least polarizable gas among the following?

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He
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Ne
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Kr
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Xe

Correct statement among the following regarding the shape of HgCl₂, SnCl₂ and F₂O is:

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All have a linear shape.
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SnCl₂ are linear and HgCl₂ is V-shaped.
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HgCl₂ is linear while SnCl₂ and F₂O are V-shaped.
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None of the above.

The correct order of bond angle order is

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${NH}_{2}^{-} > {NH}_{3} > {NH}_{4}^{+}$
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${NH}_{4}^{+} > {NH}_{3} > {NH}_{2}^{-}$
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${NH}_{3}^{} > {NH}_{_{2}}^{-} > {NH}_{4}^{+}$
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${NH}_{3}^{} > {NH}_{4}^{+} > {NH}_{2}^{-}$

The correct order of the dipole moment of the following molecules is :

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I > II > III
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I = II = III
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III > II > I
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I > III > II

Species in which central atom is sp² hybridised

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(CH₃)₃N
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(SiH₃)₃N
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(SiO₂)_n
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4 :NH₃

The number of sigma bonds in P₄O₁₀ is

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6
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16
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20
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7

Among the following isostructural compounds, which one has highest lattice energy ?

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LiCl
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MgO
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NaCl
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LiF

A sbonded molecule MX₃ is T-shaped. The number of non-bonding pairs of electrons is :

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Can be predicted only if atomic number of M is known,
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0
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2
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1

In a chemical change from ${PCl}_{3} \overset{}{\to} {PCl}_{5}$ , the hybrid state of P changes from:

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sp² to sp³
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sp³ to sp²
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sp³ to sp³d
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sp³ to dsp²

The geometrical arrangement and shape of $I_{3}^{-}$ are respectively

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Trigonal bipyramidal geometry, linear shape
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Hexagonal structure, linear shape
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Triangular planar geometry, triangular shape
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Tetrahedral geometry, pyramidal shape

which is the incorrect about bond angles ?

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NH₃ > NF₃
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NF₃ < PF₃
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NH₃ > PH₃
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NH₃ > H₂O

Which molecules/ions are most paramagnetic?

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B₂
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C₂
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$O_{2}^{+}$
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$O_{2}^{-}$

In which case observed dipole moment is greater than theoretical dipole moment?

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Which has linear shape but not sp hibridisation ?

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${XeF}_{2}$
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$I_{3}^{-}$
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${CO}_{2}$
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Both 1 and 2

Which has highest bond energy ?

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CO
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CO⁺
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N₂
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$N_{2}^{+}$

Which has highest bond angle ?

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NH₃
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H₂O
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H₂S
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PH₃

The isostere pair is

1. CO₂ and N₂O

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4. Both and (2)
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2. CO and N₂
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3. O₂ and NO₂
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4

Select the correct order of solubility (in water) from the following:

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SrSO₄ < CaSO₄ < MgSO₄ < BeSO₄
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NaF < KF < RbF < CsF
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Ba(OH)₂ > Sr(OH)₂ > Ca(OH)₂ > Mg(OH)₂
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4 All of the above

Which of the following molecules exhibits H-bonding?

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CH₄
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H₂Se
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N₂H₄
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H₂S

Compound that is isoelectronic with an adduct of "Diborane and Ammonia" is-

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Hydrogen peroxide.
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Diborane (at absolute zero temp.).
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First member of alkyne series.
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Diborane (at 10 $°$ C temp).

Which of the following leads to bonding?

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Which of the following compounds has the lowest melting point?

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CaBr₂
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CaI₂
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CaF₂
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CaCl₂

0:0:1

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