The dielectric constant of H 2 O is 80. The electrostatic force of attraction between Na + and Cl - will be

reduced to 1 80 in water than in air

reduced to 1 40 in water than in air

will be increased to 80 in water than in air

Chemistry - Chemical Bonding Molecular Structure - Quiz-1

The strongest hydrogen bond present among the following is-

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$O — H ‐ ‐ ‐ S$
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$S — H ‐ ‐ ‐ O$
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$F — H ‐ ‐ ‐ F$
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$F — H ‐ ‐ ‐ O$

Which of the following is the most basic oxide?

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$A l_{2} O_{3}$
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$S b_{2} O_{3}$
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$B i_{2} O_{3}$
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$S e O_{2}$

In which of the process, the bond order increases and magnetic behaviour changes?

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() $N_{2} \to {N_{2}}^{+}$
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() $C_{2} \to {C_{2}}^{+}$
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() $N O \to N O^{+}$
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() $O_{2} \to {O_{2}}^{+}$

Among the following, which has the maximum hydration energy?

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OH^-
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${NH}_{4}^{+}$
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F^-
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H⁺

Among the following oxides, which has the maximum lattice energy?

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MgO
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CaO
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SrO
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BaO

Which of the following pairs of species have similar shapes?

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${PCl}_{3}, {NH}_{3}$
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${CF}_{4}, {SF}_{4}$
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${PbCl}_{2}, {CO}_{2}$
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${PF}_{5}, {IF}_{5}$

Incorrect statement about resonance is :

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The resonating structures are hypothetical.
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The unpaired electrons in various resonating structures are same.
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Hybrid structure is most energetic.
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Hybrid structure is least energetic.

Which of the following species deviates from the octet rule?

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$C O_{3}^{2 -}$
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$H_{2} S O_{3}$
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$P C l_{3}$
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$O_{3}$

Which of the following species has a bent T-shape?

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${ICl}_{4}^{-}$
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${PCl}_{3}$
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${BrF}_{3}$
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$I_{3}^{-}$

In piperidine "N" atom has hybridization:

piperidine

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sp
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$s p^{2}$
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$s p^{3}$
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$d s p^{2}$

According to molecular orbital theory which of the following lists rank the nitrogen species in terms of increasing bond order ?

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$N_{2}^{-} < N_{2} < N_{2}^{2 -}$
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$N_{2}^{2 -} < N_{2}^{-} < N_{2}$
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$N_{2} < N_{2}^{2 -} < N_{2}^{-}$
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$N_{2}^{-} < N_{2}^{2 -} < N_{2}$

The correct order of increasing bond length of

C-H, C-O, C-C and C=C is

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C-C<C=C<C-O<C-H
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C-O<C-H<C-C<C=C
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C-H<C-O<C-C<C=C
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C-H<C=C<C-O<C-C

An element X is placed in group IA of the periodic table because it forms:

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An oxide which is acid
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A volatile chloride having formula XCl₂
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An ionic chloride having formula XCl
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An insoluble chloride XCl₄

Which of the following would have a permanent dipole moment ?

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BF₃
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SiF₄
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SF₄
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XeF₄

In the case of alkali metals, the covalent character decreases in the order

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MCl > MI > MBr > MF
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MF > MCl > MBr > MI
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MF > MCl > MI > MBr
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MI > MBr > MCl > MF

Which of the following two are isostructural?

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XeF₂, and IF₂^-
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NH₃, and BF₃
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CO₂, and SiO₂
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PCl₅, and IF₅

Which one of the following species does not exist?

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${Be}_{2}^{+}$
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Be₂
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B₂
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N₂

Which one of the following is not paramagnetic ?

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NO
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$N_{2}^{+}$
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CO
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$O_{2}^{-}$

In a regular octahedral molecule MX₆, the number of X-M-X bonds at 180 $°$ is-

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3
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2
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6
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4

Which of the following is not isostructural with SiCl₄?

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SCl₄
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SO₄^2-
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^PO₄3-
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NH₄⁺

In which of the following species the central atom has the type of hybridisation which is not the same as that present in the other three ?

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SF₄
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$I_{3}^{-}$
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${SbCl}_{5}^{2 -}$
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PCl₅

Which of the following has $pπ - dπ$ bonding?

4. ${CO}_{3}^{2 -}$

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${NO}_{3}^{-}$
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${SO}_{3}^{2 -}$
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${BO}_{3}^{3 -}$
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4

In BrF₃ molecule, the lone pairs occupy equatorial positions to minimize:

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Lone pair-bond pair repulsion.
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Bond pair-bond pair repulsion.
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Lone pair-lone pair repulsion and lone pair-bond pair repulsion.
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Lone pair-lone pair repulsion.

In which one of the following molecules, the central atom said to adopt sp² hybridisation ?

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BeF₂
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BF₃
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C₂H₂
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NH₃

Among the following molecules/ions BF₃, NO₂^-, NH₂^- , and H₂O, the central atom is sp² hybridized in :

3. NO₂^- and H₂O

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NO₂^-and NH₂^-
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NH₂^- and H₂O
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4. BF₃and NO₂^-
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4

Which one of the following is planar ?

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XeF₄
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XeO₄
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XeO₃
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XeO₃F₂

In ${PO}_{4}^{3 -}$ ion, the formal charge on each oxygen atom and P-O bond order respectively are :

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-0.75, 0.6
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-0.75, 1.0
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-0.75, 1.25
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-3.1, 1.25

The dielectric constant of H₂O is 80. The electrostatic force of attraction between Na⁺ and Cl^- will be

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reduced to $\frac{1}{40}$ in water than in air
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reduced to $\frac{1}{80}$ in water than in air
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will be increased to 80 in water than in air
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will remain unchanged

Which of the following is isoelectronic?

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${CO}_{2}, {NO}_{2}$
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${NO}_{2}^{-}, {CO}_{2}$
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${CN}^{-}, CO$
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${SO}_{2}, {CO}_{2}$

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

2. ${NO}_{2}^{-}$ < NO₂< ${NO}_{2}^{+}$

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${NO}_{2}^{-}$ < ${NO}_{2}^{+}$ < NO₂
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3. ${NO}_{2}^{+}$ < NO₂< ${NO}_{2}^{-}$
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3
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${NO}_{2}^{+}$ < ${NO}_{2}^{-}$ < NO₂

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Practice Chemistry Quiz Questions and Answers

0:0:1

Practice Chemistry Quiz Questions and Answers

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