Chemical Bonding and Molecular Structure

The order of dipole moments of $\mathrm{H}_2 \mathrm{O}(A), \mathrm{CHCl}_3(B)$ and $\mathrm{NH}_3(C)$ is

\(\text { Which of the following sets are correctly matched? }\)
$$ \begin{array}{llll} \hline & \text { Molecule } & \text { Hybridisation } & \text { Geometry } \\ \hline \text { I. } & \mathrm{BrF}_5 & s p^3 d^2 & \text { Square pyrami...

The sum of bond order of $\mathrm{O}_2^{2+}, \mathrm{O}_2^{2-}, \mathrm{O}_2^{+}, \mathrm{O}_2^{-}, \mathrm{O}_2$ and sum of the unpaired electrons present in them respectively are

The correct order of increasing bond lengths of $\mathrm{C}-\mathrm{H}$, $\mathrm{O}-\mathrm{H}, \mathrm{C}-\mathrm{C}$ and $\mathrm{H}-\mathrm{H}$ is

\(\text { Which of the following sets are correctly matched? }\)
$$ \begin{array}{llcc} \hline & \text { Molecule } & \begin{array}{c} \text { Number of lone } \\ \text { pair of electrons } \\ \text { on central atom } \end{array} & \tex...

\(\text { Match the following }\)


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Observe the following molecules/ions $\mathrm{NH}_4^{+}, \mathrm{NH}_3, \mathrm{BF}_3, \mathrm{OH}^{-}, \mathrm{CH}_3^{+}, \mathrm{H}^{+}, \mathrm{CO}, \mathrm{C}_2 \mathrm{H}_4$.
The number of Lewis bases in the above list is

The number of molecules having lone pair of electrons on central atom in the following is
$\mathrm{BF}_3, \mathrm{SF}_4, \mathrm{SiCl}_4, \mathrm{XeF}_4, \mathrm{NCl}_3, \mathrm{XeF}_6, \mathrm{PCl}_5, \mathrm{HgCl}_2, \mathrm{SnCl}_2$

A molecules has T -shape. The total number of electron pairs in the valence shell of central atom of it is

The sum of bond order values of $\mathrm{C}_2$ and $\mathrm{O}_2^{2+}$ is $x$, which is equal to sum of bond order values of $a, b$ and $c$. What are $a, b$ and $c$ ?

Identify the pair of molecules which have same hybridisation as the hybridisation in xenon (II) fluoride.

Identify the set containing isoelectronic species

Consider the following
Assertion (A) Dipole moment of $\mathrm{NF}_3$ is lesser than $\mathrm{NH}_3$.
Reason (R) In $\mathrm{NF}_3$, the orbital dipole due to lone pair of electrons is in the opposite direction to the resultant dipole momen...

How many of the following molecules / ions have trigonal planar structure?
\(\mathrm{BO}_3^{3-}, \mathrm{NH}_3, \mathrm{PCl}_3, \mathrm{BCl}_3, \mathrm{ClF}_3, \mathrm{XeO}_3\)

The pair of molecules / ions with the same bond order value is

How many of the following molecules have two lone pairs of electrons on central atom?
$\mathrm{SF}_6, \mathrm{BF}_3, \mathrm{ClF}_3, \mathrm{PCl}_5, \mathrm{BrF}_5, \mathrm{XeF}_4, \mathrm{H}_2 \mathrm{O}, \mathrm{SF}_4$

The increasing order of number of lone pair of electrons on the central atom of the following molecules is
(I) $\mathrm{ClF}_3$
(II) $\mathrm{XeF}_2$
(III) $\mathrm{SF}_4$
(IV) $\mathrm{SiH}_4$

Consider the following changes I and II
\(\mathrm{O}_2^{-} \underset{\text { II }}{\longleftarrow} \mathrm{O}_2 \xrightarrow[\text { I }]{ } \mathrm{O}_2^{+}\)
The correct statements about these changes (I) and (II) in accordance with MO ...

Identify the correct set of molecules with zero dipole moment

Identify the set of molecules in which the central atom has only one lone pair of electrons in their valence shells

Which of the following sets are correctly matched?
(i) $\mathrm{B}_2 \mathrm{H}_6$ - electron deficient hydride
(ii) $\mathrm{NH}_3$ - electron precise hydride
(iii) $\mathrm{H}_2 \mathrm{O}$ - electron rich hydride

Which of the following is /are ionic in nature?
(i) $\mathrm{GeF}_4$
(ii) $\mathrm{SnF}_4$
(iii) $\mathrm{PbF}_4$
The correct option is

The bond order of which of the following two species is same?

\(\text { In the given structure of diborane } \theta_1, \theta_2 \text { are respectively }\)

In which of the following sets the sum of bond orders of three species is maximum ?

In which of the following, there is no change in hybridisation of the central atom ?

The number of lone pairs of electrons on the central atom of $\mathrm{BrF}_5, \mathrm{XeO}_3, \mathrm{SO}_2$ respectively are

The basicity of $\mathrm{H}_3 \mathrm{PO}_2, \mathrm{H}_3 \mathrm{PO}_3 \cdot \mathrm{H}_3 \mathrm{PO}_4$ respectively is

The shape of colourless neutral gas formed on thermal decomposition of ammonium nitrate is

Species $A, B, C, D$ formed in the following bond cleavages respectively are

\(\text { Observe the following sets. }\)
$$ \begin{array}{lll} \hline \text { Order } & \text { Property } \\ \hline \text { (i) } \mathrm{NH}_3>\mathrm{H}_2 \mathrm{O}>\mathrm{SO}_2 & \text { Bond angle } \\ \hline \text { (ii) } \mathr...

Which of the following orders are correct regarding their covalent character?
(i) $\mathrm{KF}<\mathrm{KI}$
(ii) $\mathrm{LiF}<\mathrm{KF}$
(iii) $\mathrm{SnCl}_2<\mathrm{SnCl}_4$
(iv) $\mathrm{NaCl}<\mathrm{CuCl}$
The correct option is

The correct order of covalent bond character of $\mathrm{BCl}_3, \mathrm{CCl}_4, \mathrm{BeCl}_2, \mathrm{LiCl}$ is

In which of the following pairs, both molecules possess dipole moment?

\(\text { Observe the following structure, }\)

\(\text { The formal charges on the atoms 1,2,3 respectively are }\)

The correct order of bond angles of the molecules $\mathrm{SiCl}_4, \mathrm{SO}_3, \mathrm{NH}_3, \mathrm{HgCl}_2$ is

The bond angles $b_1, b_2$ and $b_3$ in the given structure are respectively (in ${ }^{\circ}$ )

Among the following species, correct set of isostructural pairs are $\mathrm{XeO}_3, \mathrm{CO}_3^{2-}, \mathrm{SO}_3, \mathrm{H}_3 \mathrm{O}^{+}, \mathrm{ClF}_3$

Observe the following reactions. Identify the reaction in which the hybridisation of underlined atom is changed

In which of the following sets of molecules, the centil atoms of molecules have same hybridisation?

The correct increasing order of number of lone pair of electrons on the central atom of $\mathrm{SnCl}_2, \mathrm{XeF}_2, \mathrm{CIF}_3$ and $\mathrm{SO}_3$ is

The bond lengths of diatomic molecules of elements $X$, $Y$ and $Z$ respectively are 143, 110 and 121 pm . The atomic numbers of $X, Y$, and $Z$ respectively are

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The correct formula used to determine the formal charge (Q) on an atom in the given Lewis structure of a molecule or ion is ( $V=$ number of valence electrons in free atom, $U=$ number of unshared electrons on the atom, $B=$ number of bonds...

Identify incorrectly matched set from the following.

If the bond order in $C_2$ is ' $x^{\prime}$ then the bond order in $B_2$ and $\mathrm{O}_2$, respectively are

\(\text { Which of the following sets is correct? }\)



Molecule
Hybridisation
Geometry
Number of lone pairs of electrons on central atom


I



SiH

4




SiH

4

SiH_(4)

s

p
3
...

Which of the following is not the property of covalent substances?

In the Lewis dot structure of carbonate ion shown under the formal charges on the oxygen atoms 1, 2 and 3 are respectively

The set of species having only fractional bond order values is