Which of the following molecules involves the formation of $\mathrm{d}\mathrm{\pi }-\mathrm{p}\mathrm{\pi }$ bonding?

Important Questions on Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Which of the following compounds contain(s) no covalent bond(s)?

$\mathrm{KCl},\mathrm{ }{\mathrm{PH}}_3,\mathrm{ }{\mathrm{O}}_2,\mathrm{ }{\mathrm{B}}_2{\mathrm{H}}_6,\mathrm{ }{\mathrm{H}}_2{\mathrm{SO}}_4$

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The numbers of lone pair and bond pairs in hydrazine are, respectively:

HARD

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The lattice energies of $\mathrm{NaCl},\mathrm{ }\mathrm{NaF},\mathrm{ }\mathrm{KCl}$ and $\mathrm{RbCl}$ follow the order

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

What do you understand by a lone pair of electrons?

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The sum of the number of dative bonds present in all the given species are; ${\mathrm{Al}}_2{\mathrm{Cl}}_6, \mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6, \mathrm{CO}, {\mathrm{NH}}_4^{+}$

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Give a reason for the following:

Ionic compounds have a high melting point.

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Among the following molecules, the one with the largest bond angle at the central atom is

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The number of $\pi$ -bonds and $\sigma$ -bonds present in naphthalene are respectively

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Draw the electron dot structure of Ammonium ion. $[\mathrm{N}=7, \mathrm{H}=1]$

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The compound(s) with two lone pairs of electrons on the central atom is (are)

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

In ozone molecule, the formal charge on the central oxygen atom is

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The number of co-ordination bonded water molecules associated with ${\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}$ is _______

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Arrange the following compounds in increasing order of $\mathrm{C}-\mathrm{O}\mathrm{H}$ bond length: methanol, phenol, $\mathrm{p}$ -ethoxyphenol

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Total number of lone pair of electrons in ${{\mathrm{I}}_3}^{-}$ ion is:

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The compound having longest $\mathrm{C}-\mathrm{Cl}$ bond is:

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The correct order of $\mathrm{C}-\mathrm{O}$ bond length is:

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

Which of the following pair contains $2$ lone pair of electrons on the central atom?

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

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

MEDIUM

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

The total number of dative bonds present in all the following $\mathrm{CO}, {\mathrm{NH}}_4\mathrm{Cl}, {\mathrm{Al}}_2{\mathrm{Cl}}_6, \mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6, {\mathrm{HNO}}_3$ and ${\mathrm{CO}}_2$ is

EASY

Physical Sciences>Matter and Its Interactions>Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.>Structure and Properties of Matter - A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

What is the nature of the bond between $\mathrm{B}$ and $\mathrm{O}$ in ${\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_2{\mathrm{OBH}}_3 ?$