Chemical Bonding & Molecular Structure

Match List I with List II

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For \(\mathrm{OF}_{2}\) molecule consider the following :
A. Number of lone pairs on oxygen is 2 .
B. FOF angle is less than \(104.5^{\circ}\).
C. Oxidation state of \(\mathrm{O}\) is \(-2\).
D. Molecule is bent '\(\mathrm{V}\)' shaped.
E. ...

The number of molecules or ions from the following, which do not have odd number of electrons are _________.
(A) NO\(_2\)
(B) ICl\(_4^ -\)
(C) BrF\(_3\)
(D) ClO\(_2\)
(E) NO\(_2^ +\)
(F) NO

The bond dissociation energy is highest for

The magnetic behaviour of \(\mathrm{Li_2O,Na_2O_2}\) and \(\mathrm{KO_2}\), respectively, are :

According to MO theory the bond orders for \(\mathrm{O}\)\(_2^{2 - }\), \(\mathrm{CO}\) and \(\mathrm{NO^+}\) respectively, are

The total number of lone pairs of electrons on oxygen atoms of ozone is __________.

Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.
Statement II : The crossed arrow of the dipole moment symboli...

Order of Covalent bond;
\(\mathrm{A.~KF > KI ; LiF > KF}\)
\(\mathrm{B.~KF < KI ; LiF > KF}\)
\(\mathrm{C.~SnCl_4 > SnCl_2 ; CuCl > NaCl}\)
\(\mathrm{D.~LiF > KF ; CuCl < NaCl}\)
\(\mathrm{E.~KF < KI ; CuCl > NaCl}\)
Choose the correct answ...

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by
A. Liquid water
B. Ice
C. Impure water
Choose the correct answer from the options given below :

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : \(\mathrm{{N_2};N_2^ + ;{O_2};O_2^ + }\) ?

\(\mathrm{O}-\mathrm{O}\) bond length in \(\mathrm{H}_{2} \mathrm{O}_{2}\) is \(\underline{\mathrm{X}}\) than the \(\mathrm{O}-\mathrm{O}\) bond length in \(\mathrm{F}_{2} \mathrm{O}_{2}\). The \(\mathrm{O}-\mathrm{H}\) bond length in $$\ma...

Consider the following statements:

(A) NF3 molecule has a trigonal planar structure.

(B) Bond length of $\mathrm{N}_{2}$ is shorter than $\mathrm{O}_{2}$.

(C) Isoelectronic molecules or ions have identical bond order.

(D) Dipole moment ...

The number of $\mathrm{P}-\mathrm{O}-\mathrm{P}$ bonds in $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7},\left(\mathrm{HPO}_{3}\right)_{3}$ and $\mathrm{P}_{4} \mathrm{O}_{10}$ are respectively :

\(\mathrm{ClF}_{5}\) at room temperature is a:

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ?

Given below are two statements :
Statement I : \(\mathrm{SO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\) both possess V-shaped structure.
Statement II : The bond angle of \(\mathrm{SO}_{2}\) is less than that of \(\mathrm{H}_{2} \mathrm{O}\).
I...

The bond order and magnetic property of acetylide ion are same as that of

Match List - I with List - II:

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The maximum number of lone pairs of electrons on the central atom from the following species is ____________.
\(\mathrm{ClO}_{3}{ }^{-}, \mathrm{XeF}_{4}, \mathrm{SF}_{4}\) and \(\mathrm{I}_{3}{ }^{-}\)

The sum of lone pairs present on the central atom of the interhalogen IF\(_5\) and IF\(_7\) is _________

The number of bent-shaped molecule/s from the following is __________
N\(_3^-\), NO\(_2^-\), I\(_3^-\), O\(_3\), SO\(_2\)

The compound which does not exist is

The number of molecules from the following which contain only two lone pair of electrons is ________
$$\mathrm{H}_{2} \mathrm{O}, \mathrm{N}_{2}, \mathrm{CO}, \mathrm{XeF}_{4}, \mathrm{NH}_{3}, \mathrm{NO}, \mathrm{CO}_{2}, \mathrm{~F}_{2}$...

Amongst the following, the number of molecule/(s) having net resultant dipole moment is ____________.
NF3, BF3, BeF2, CHCl3, H2S, SiF4, CCl4, PF5

Number of lone pair(s) of electrons on central atom and the shape BrF3 molecule respectively, are

Consider the species CH4, NH\(_4^ +\) and BH\(_4^ -\). Choose the correct option with respect to the these species.

Number of lone pairs of electrons in the central atom of \(\mathrm{SCl}_{2}, \mathrm{O}_{3}, \mathrm{ClF}_{3}\) and \(\mathrm{SF}_{6}\), respectively, are :

Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?

Consider, \(\mathrm{PF}_{5}, \mathrm{BrF}_{5}, \mathrm{PCl}_{3}, \mathrm{SF}_{6},\left[\mathrm{ICl}_{4}\right]^{-}, \mathrm{ClF}_{3}\) and \(\mathrm{IF}_{5}\).
Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having $$...

The hybridization of P exhibited in PF5 is spxdy. The value of y is __________.

In the structure of SF4, the lone pair of electrons on S is in.

The number of interhalogens from the following having square pyramidal structure is :
\(\mathrm{ClF}_{3}, \mathrm{IF}_{7}, \mathrm{BrF}_{5}, \mathrm{BrF}_{3}, \mathrm{I}_{2} \mathrm{Cl}_{6}, \mathrm{IF}_{5}, \mathrm{ClF}, \mathrm{ClF}_{5}\)

The number of paramagnetic species among the following is ___________.
\(\mathrm{B}_{2}, \mathrm{Li}_{2}, \mathrm{C}_{2}, \mathrm{C}_{2}^{-}, \mathrm{O}_{2}^{2-}, \mathrm{O}_{2}^{+}\) and \(\mathrm{He}_{2}^{+}\)

Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select the most appropriate option.

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The correct order of increasing intermolecular hydrogen bond strength is :

Identify the incorrect statement for PCl5 from the following.

According to MO theory, number of species/ions from the following having identical bond order is ________.
\(\mathrm{CN}^{-}, \mathrm{NO}^{+}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2+}\)

Amongst the following, the number of oxide(s) which are paramagnetic in nature is
$$\mathrm{Na}_{2} \mathrm{O}, \mathrm{KO}_{2}, \mathrm{NO}_{2}, \mathrm{~N}_{2} \mathrm{O}, \mathrm{ClO}_{2}, \mathrm{NO}, \mathrm{SO}_{2}, \mathrm{Cl}_{2} \m...

Given below are two statements.
Statement I: \(\mathrm{O}_{2}, \mathrm{Cu}^{2+}\), and \(\mathrm{Fe}^{3+}\) are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement II: \(\mathrm{NaCl}\) a...

The number of molecule(s) or ion(s) from the following having non-planar structure is ____________.
$$\mathrm{NO}_{3}^{-}, \mathrm{H}_{2} \mathrm{O}_{2}, \mathrm{BF}_{3}, \mathrm{PCl}_{3}, \mathrm{XeF}_{4}, \mathrm{SF}_{4}, \mathrm{XeO}_{3}...

Match List - I with List - II.

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Consider the ions/molecule
O\(_2^ +\), O2, O\(_2^ -\), O\(_2^ {2-}\)
For increasing bond order the correct option is :

Amongst SF4, XeF4, CF4 and H2O, the number of species with two lone pairs of electrons is _____________.

Match List-I with List-II :

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Arrange the following in increasing order of their covalent character.
A. \(\mathrm{CaF}_{2}\)
B. \(\mathrm{CaCl}_{2}\)
C. \(\mathrm{CaBr}_{2}\)
D. \(\mathrm{CaI}_{2}\)
Choose the correct answer from the options given below.

Number of electron deficient molecules among the following
PH3, B2H6, CCl4, NH3, LiH and BCl3 is

Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron?
(A) NO
(B) N2
(C) O2
(D) C2
(E) B2
Choose the most appropriate answer from the options given below :

Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ____________.

Among the following species
\(\mathrm{N}_{2}, \mathrm{~N}_{2}^{+}, \mathrm{N}_{2}^{-}, \mathrm{N}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{-}, \mathrm{O}_{2}^{2-}\)
the number of species showing diamagnesim is _________...