Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): N 2 is less reactive than P 4 . Reason (R): Nitrogen has more electron gain enthalpy than phosphorus.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Bismuth forms only one well characterised compound in +5 oxidation state. Reason (R): Elements of group-15 form compounds in +5 oxidation state.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O 2 . Reason (R): Oxygen forms pp-pp multiple bond due to small size and small bond length but pπ-pπ bonding is not possible in sulphur.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): SF 6 cannot be hydrolysed but SF 4 can be. Reason (R): Six atoms in SF 6 prevent the attack of H 2 O on sulphur atom of SF 6 .

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): HI cannot be prepared by the reaction of KI with concentrated H 2 SO 4 . Reason (R): HI has lowest H–X bond strength among halogen acids.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): F 2 has lower bond dissociation energy than Cl 2 . Reason (R): Fluorine is more electronegative than chlorine.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion(A): Group 18 gases exhibit very high ionisation enthalpy. Reason (R): They have a stable electronic configuration.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion(A): Helium diffuses through most commonly used laboratory materials. Reason(R): This gas has a very low melting point.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): HNO 3 makes iron passive. Reason (R): HNO 3 forms a protective layer of ferric nitrate on the surface of iron.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): NaCl reacts with concentrated H2SO4 to give colourless fumes with pungent smell. But on adding MnO2 the fumes become greenish yellow. Reason (R): MnO2 oxidises HCl to chlorine gas which is greenish yellow.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): NaCl reacts with concentrated H 2 SO 4 to give colourless fumes with pungent smell. But on adding MnO 2 the fumes become greenish yellow. Reason (R): MnO 2 oxidises HCl to chlorine gas which is greenish yellow

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): H 2 O a liquid and H 2 S a gas. Reason (R): Water molecules are held by H-bonds while in H 2 S molecules no such interactions are present between molecules.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): F 2 is a strong oxidizing agent. Reason (R): Electron gain enthalpy of fluorine is less negative.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): F 2 has lower reactivity. Reason (R): F-F bond has low Δ bond H o .

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion(A): The noble gases are inactive. Reason(R): These gases have a closed shell structure.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

Assertion and Reason Test: The p-Block Elements Free MCQ Practice Test with Solutions

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