Chemical Bondin...

In the following question, 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): Though the central atom of both NH₃ and H₂O molecules are sp³ hybridised, yet H–N–H bond angle is greater than that of H–O–H.

Reason (R): This is because nitrogen atom has one lone pair and oxygen atom has two lone pairs.

In the following question, 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): Crystals of hydrated calcium sulphate (gypsum: CaSO₄, 2H₂O) are soft and easily cleaved.

Reason(B): Crystals of anhydrous calcium sulphate (anhydrite: CaSO₄) are very hard and very difficult to cleave.

In the following question, 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): The dipole moment helps to predict whether molecule is polar or non-polar

Reason (R): The dipole moment helps to predict the geometry of molecules.

In the following question, 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): Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound.

Reason (R): This is because sodium and chloride ions acquire octet in sodium chloride formation.

In the following question, 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): Ionic bonds are always stronger than covalent bonds.

Reason(B): They break only when bombarded with electrons.

In the following question, 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 H₂O 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.

In the following question, 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): NO⁺ and CN^- both have same bond order and magnetism

Reason(B): NO⁺ and CN^- are isoelectornic species.