Consider the molecules CH 4 , NH 3 and H 2 O. Which of the given statements is false?

The H-O-H bond angle in H 2 O is larger than the H-C-H bond angle in CH 4

The H-C-H bond angle in CH 4 is larger than the H-N-H bond angle in NH 3

The H-C-H bond angle in CH 4 , the H-N-H bond angle in NH 3 and the H-0-H bond angle in H 2 O are all greater than 90 o

The H-O-H bond angle in H 2 O is smaller than the H-N-H bond angle in NH 3

The state of hybridisation of C 2 , C 3 , C 5 and C 6 of the hydrocarbon is in the following sequence

s p , s p 3 , s p 2 a n d s p 3

s p 3 , s p 2 , s p 2 a n d s p

s p , s p 2 , s p 2 a n d s p 3

s p , s p 2 , s p 3 a n d s p 2

Chemistry - Chemical Bonding Molecular Structure - Quiz-11

Predict the correct order among the following.

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lone pair-lone pair > bond pair-bond pair >lone pair-bond pair
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bond pair-bond pair> lone pair-bond pair>lone pair-lone pair
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lone pair-bond pair > bond pair-bond pair >lone pair-lone pair
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lone pair-lone pair> lone pair-bond pair>bond pair-bond pair

Consider the molecules CH₄, NH₃ and H₂O. Which of the given statements is false?

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The H-O-H bond angle in H₂O is larger than the H-C-H bond angle in CH₄
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The H-C-H bond angle in CH₄ is larger than the H-N-H bond angle in NH₃
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The H-C-H bond angle in CH₄, the H-N-H bond angle in NH₃ and the H-0-H bond angle in H₂O are all greater than 90^o
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The H-O-H bond angle in H₂O is smaller than the H-N-H bond angle in NH₃

Which of the following species contains equal number of $σ$ and $π$ bonds?

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${HCO}_{3}^{-}$
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${XeO}_{4}$
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${(CN)}_{2}$
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CH₂(CN)₂

Which of the following pairs of ions are isoelectronic and isostructural?

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${CO}_{3}^{2 -}, {SO}_{3}^{2 -}$
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${ClO}_{3}^{-}, {CO}_{3}^{2 -}$
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${SO}_{3}^{2 -}, {NO}_{3}^{-}$
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${ClO}_{3}^{-}, {SO}_{3}^{2 -}$

Maximum bond angle at nitrogen is present in which of the following?

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${NO}_{2}$
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${NO}_{2}^{-}$
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${NO}_{2}^{+}$
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${NO}_{3}^{-}$

A molecule among the following having a maximum dipole moment is:

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$C O_{2}$
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$C H_{4}$
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$N H_{3}$
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$N F_{3}$

Which one of the following species has plane triangular shape ?

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$N_{3}$ ^-
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$N O_{3}^{-}$
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$N O_{2}$ ^-
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$C O_{2}$

Which among the following is an electron-deficient compound?

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(SiH₃)₂
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(BH₃)₂
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PH₃
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(CH₃)₂

Which one of the following molecules contains no π bond?

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H₂O
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SO₂
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NO₂
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CO₂

Which of the following is a polar molecule?

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SF₄
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SiF₄
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XeF₄
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BF₃

A paramagnetic molecule among the following is -

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O₂^–
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CN^–
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NO⁺
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CO

XeF₂ is isostructural with:

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ICl₂^–
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SbCl₃
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BaCl₂
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TeF₂

The bond order of 1.5 is shown by :

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$O_{2}^{+}$
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$O_{2}^{-}$
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$O_{2}^{2 -}$
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$O_{2}$

Identify the wrong statement among the following.

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Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
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Amongst isoelectronic species, greater the negative charge on the anion, larger is ionic radius
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Atomic radius of the elements encreases as one move down the first group of the Periodic Table
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Atomic radius of the elements decreases as one move across from left to right in the 2nd period of the Periodic Table

Which of the following species contains three bond pairs and one lone pair around the central atom?

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$H_{2} O$
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$B F_{3}$
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$N {H^{-}}_{2}$
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$P C l_{3}$

The pair of species with the same bond order is

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$O_{2}^{2 -}, B_{2}$
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$O_{2}^{+}, N O^{+}$
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NO,CO
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$N_{2}, O_{2}$

Which of the two ions from the list given below have the geometry that is explained by the same hybridisation of orbitals, ${NO}_{2}^{-}, {NO}_{3}^{-}, {NH}_{2}^{-}, {NH}_{4}^{-}, {SCN}^{-}$ ?

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${NH}_{4}^{-} and {NO}_{3}^{-}$
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${SCN}_{}^{-} and {NH}_{2}^{-}$
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${NO}_{2}^{-} and {NH}_{2}^{-}$
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${NO}_{2}^{-} and {NO}_{3}^{-}$

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has a high melting point?

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Metallic bonding
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Van der Waals' bonding
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Ionic bonding
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Covalent bonding

In which of the following pairs of molecules/ions, the central atoms have sp²hybridization ?

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$N O_{2}^{-} a n d N H_{3}$
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$B F_{3} a n d N O_{2}^{-}$
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$N H_{2}^{-} a n d H_{2} O$
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$B F_{3} a n d N H_{2}^{-}$

A molecule/ion among the following species that does not exist under normal conditions is -

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$B e_{2}^{+}$
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$B e_{2}$
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$B_{2}$
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$L i_{2}$

The correct order of increasing bond angles in the following species is

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$C l_{2} O < C l O_{2} < C l O_{2}^{-}$
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$C l O_{2} < C l_{2} O < C l O_{2}^{-}$
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$C l_{2} O < C l O_{2} < C l O_{2}$
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$C l O_{2}^{-} < C l_{2} O < C l O_{2}$

The state of hybridisation of C₂, C₃, C₅ and C₆of the hydrocarbon

is in the following sequence

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$s p, s p^{3}, s p^{2} a n d s p^{3}$
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$s p^{3}, s p^{2}, s p^{2} a n d s p$
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$s p, s p^{2}, s p^{2} a n d s p^{3}$
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$s p, s p^{2}, s p^{3} a n d s p 2$

Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order?

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$O_{2}^{-} < NO < C_{2}^{2 -} < {He}_{2}^{+}$
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$NO < C_{2}^{2 -} < O_{2}^{-} < {He}_{2}^{+}$
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$C_{2}^{2 -} < {He}_{2}^{+} < NO < O_{2}^{-}$
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${He}_{2}^{+} < O_{2}^{-} < NO < C_{2}^{2 -}$

The correct order of C-O bond length among CO, ${CO}_{3}^{2 -}$ , CO₂ is :

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$C O_{2} < C O_{3}^{2 -} < C O$
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$C O < C O_{3}^{2 -} < C O_{2}$
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$C O_{3}^{2 -} < C O_{2} < C O$
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$C O < C O_{2} < C O_{3}^{2 -}$

In which of the following pairs, the two species are iso-structural?

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$S F_{4} a n d X e F_{4}$
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$S O_{3}^{2 -} a n d N O_{3}^{-}$
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$B F_{3} a n d N F_{3}$
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$B r O_{3}^{-} a n d X e O_{3}$

Orbital that is used by oxygen atom to form sigma bond with other oxygen atom in $O_{2}$ molecule is :

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Pure p-orbital.
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$s p^{2} - h y b r i d o r b i t a l$ .
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$s p^{3}$ -hybrid orbital.
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sp-hybrid orbital.

The geometry and the dipole moment of $H_{2} S$ is:

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Angular (distorted tetrahedral) and non-zero.
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Angular and zero.
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Linear and zero.
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Linear and non-zero.

Match the oxide given in column I with its property given column II

Column I Column II

(i) ${Na}_{2} O$ (a) Neutral

(ii) $A l_{2} O_{3}$ (b) Basic

(iii) $N_{2} O$ (c) Acidic

(iv) $C l_{2} O_{7}$ (d) Amphoteric

Which of the following options has all correct pairs?

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(i)-(b), (ii)-(a), (iii)-(d), (iv)-(c)
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(i)-(c), (ii)-(b), (iii)-(a), (iv)-(d)
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(i)-(a), (ii)-(d), (iii)-(b), (iv)-(c)
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(i)-(b),(ii)-(d), (iii)-(a), (iv)-(c)

Which of the following is a paramagnetic compound?

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$N_{2}$
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$H_{2}$
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${Li}_{2}$
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$O_{2}$

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Practice Chemistry Quiz Questions and Answers

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Practice Chemistry Quiz Questions and Answers

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