Assertion and Reasons of Solid State MCQ Basic Level

Assertion and Reasons of Solid State MCQ Basic Level

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Assertion : Diamond is a precious stone.
  Reason : Carbon atoms are tetrahedrally arranged in diamond.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If both assertion and reason are true but reason is not the correct explanation of the assertion.

Q2. Assertion : In crystal lattice, the size of the cation is larger in a tetrahedral hole than in an octahedral hole.
  Reason : The cations occupy more space than anions in crystal packing.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If the assertion and reason both are false.

Q3. Assertion : Crystalline solids have short range order.
  Reason : Amorphous solids have long range order.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If the assertion and reason both are false.

Q4. Assertion : In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.
  Reason : Equal number of cation and anion vacancies are present.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If both assertion and reason are true and the reason is the correct explanation of the assertion.

Q5. Assertion : In close packing of spheres, a tetrahedral void is surrounded by four spheres whereas an octahedral void is surrounded by six spheres.
  Reason : A tetrahedral void has a tetrahedral shape whereas an octahedral void has an octahedral shape.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If assertion is true but reason is false.

Q6. Assertion : Anion vacancies in alkali halides are produced by heating the alkali halide crystals with alkali metal vapour.
  Reason : Electrons trapped in anion vacancies are referred to as -centres.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If both assertion and reason are true but reason is not the correct explanation of the assertion.

Q7. Assertion : Electrical conductivity of semiconductors increases with increasing temperature.
  Reason : With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If both assertion and reason are true and the reason is the correct explanation of the assertion.

Q8. Assertion : On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
  Reason : The electrons change their spin on heating.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If both assertion and reason are true and the reason is the correct explanation of the assertion.

Q9. Assertion : Lead zirconate is a piezoelectric crystal.
  Reason : Lead zirconate crystals have no dipole moment.

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If assertion is true but reason is false.

Q10. Assertion : The presence of a large number of Schottky defects in NaCl lowers its density.
  Reason : In NaCl, there are approximately 10⁶ Schottky pairs per cm³ at room temperature

•  If both assertion and reason are true and the reason is the correct explanation of the assertion.
•  If both assertion and reason are true but reason is not the correct explanation of the assertion.
•  If assertion is true but reason is false.
•  If the assertion and reason both are false.

If both assertion and reason are true but reason is not the correct explanation of the assertion.