Chemical Bondin...

If the electronic configuration of an element is \(1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^6\, 3d^2\, 4s^2\), the four electrons involved in chemical bond formation will be.....

Which of the following angle corresponds to \(sp^2\) hybridisation?

The electronic configurations of three elements, A, B and C are given below. Answer the questions on the basis of these configurations.

Stable form of A may be represented by the formula :

The electronic configurations of three elements, A, B and C are given below. Answer the questions on the basis of these configurations.

Stable form of C may be represented by the formula :

The electronic configurations of three elements, A, B and C are given below. Answer the questions on the basis of these configurations.

The molecular formula of the compound formed from B and C will be

The electronic configurations of three elements, A, B and C are given below. Answer the questions on the basis of these configurations.

The bond between B and C will be

Which of the following statements are correct about \(CO_3^{2-}\)?

(i) The hybridisation of central atom is \(sp ^3 \).

(ii) Its resonance structure has one C-O single bond and two C=O double bonds.

(iii) The average formal charge on each oxygen atom is 0.67 units.

(iv) All C-O bond lengths are equal.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Among the two O-H bonds in \(H_2O\) molecule, the energy required to break the first O-H bond and the other O-H bond is the same.

Reason (R): This is because the electronic environment around oxygen is the same even after breakage of one O-H bond.

Match the items given in Column I with examples given in Column II.

Dimagnetic species are those which contain no unpaired electrons. Which among the following are dimagnetic?

(i) \(N_2\)

(ii) \(N_2^{2-}\)

(iii) \(O_2\)

(iv) \(O_2^{2-}\)

Which of the following order of energies of molecular orbitals of \(N_2\) is correct?

Species having same bond order are:

(i) \(N_2\)

(ii) \(N_2^-\)

(iii) \(F_2^+\)

(iv) \(O_2^-\)

Which of the following statements are not correct?

(i) NaCl being an ionic compound is a good conductor of electricity in the solid state.

(ii) In canonical structures, there is a difference in the arrangement of atoms.

(iii) Hybrid orbitals form stronger bonds than pure orbitals.

(iv) VSEPR Theory can explain the square planar geometry of \(X_eF_4 \).

Match the shape of molecules in Column I with the type of hybridisation in Column II.

Which of the following statement is not correct from the view point of molecular orbital theory?

Which of the following options represents the correct bond order?

The electronic configuration of the outermost shell of the most electronegative element is

Amongst the following elements whose electronic configurations are given below, the one having the highest ionisation enthalpy is

According to molecular orbital theory, which of the following is true with respect to \(Li_2^+\) and \(Li_2^-\) ?

For the chemical reaction \(N_{2(g)}+3H_{2(g)} \rightleftharpoons 2NH_{3(g)}\) The correct option is

Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding? 

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

The electro valency theory explains that atoms are held together by an___________that resulted due to transfer or sharing of electrons.

Molecule which contains only sigma bonds in it is:

A triple bond may be best described as :

Which of the following species has incomplete octet?

The $$O-H$$ bond length in $$H_2O$$ is $$xA^0$$. The $$O-H$$ bond length in $$H_2O_2$$ is:

The number of lone pairs available on the central atom of sulphur tetrafluoride is :

A chemical bond between two atoms is:

How many unpaired electrons are present in $$N_2^+$$ :