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Q. No.Given below are two statements:
| Assertion (A): | Solids are rigid. |
| Reason (R): | The constituent particles of solids cannot move from their positions. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Introduction & Crystal System |
83%
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Solids have a definite volume because of :
1. Strong intermolecular forces.
2. Weak intermolecular forces.
3. Weak intramolecular forces.
4. All of the above.
1. Strong intermolecular forces.
2. Weak intermolecular forces.
3. Weak intramolecular forces.
4. All of the above.
Subtopic: Introduction & Crystal System |
88%
From NCERT
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Match the items in column I with the items in column II.
1. a-i; b-ii; c-i; d-ii
2. a-ii; b-ii; c-i; d-i
3. a-ii; b-i; c-i; d-ii
4. a-i; b-i; c-ii; d-ii
| Column I: Solids | Column II: Types |
| a. Polyurethane | i. Crystalline |
| b. Naphthalene | ii. Amorphous |
| c. Benzoic acid | |
| d. Teflon |
1. a-i; b-ii; c-i; d-ii
2. a-ii; b-ii; c-i; d-i
3. a-ii; b-i; c-i; d-ii
4. a-i; b-i; c-ii; d-ii
Subtopic: Introduction & Crystal System |
51%
From NCERT
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| Statement 1: | Glass considered a super cooled liquid. |
| Statement 2: | Glass has tendency to flow slowly. |
1. Statement 1 is true , statement 2 is false.
2. Statement 1 is false, statement 2 is true.
3. Both statements are false.
4. Both statements are true.
Subtopic: Introduction & Crystal System |
72%
From NCERT
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Refractive index of a solid is observed to have the same value along all directions. Such solids are classified as -
1. Isotropic solid
2. Anisotropy solid
3. Crystalline solids
4. Cannot predict
1. Isotropic solid
2. Anisotropy solid
3. Crystalline solids
4. Cannot predict
Subtopic: Introduction & Crystal System |
77%
From NCERT
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Match the items in column I with the items in column II.
1. a-iv; b-iii; c-i, d-ii
2. a-ii; b-i; c-iv, d-iii
3. a-iv; b-ii; c-iv, d-i
4. a-iii; b-iv; c-i, d-ii
| Column I | Column II |
| a. Potassium sulphate | i. Molecular (non-polar) solid |
| b. Benzene | ii. Ionic solid |
| c. Water | iii. Covalent or network solid |
| d. Graphite | iv. Hydrogen bonded molecular solid |
1. a-iv; b-iii; c-i, d-ii
2. a-ii; b-i; c-iv, d-iii
3. a-iv; b-ii; c-iv, d-i
4. a-iii; b-iv; c-i, d-ii
Subtopic: Introduction & Crystal System |
89%
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Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. Such type of solid is known as -
1. Covalent or network solid
2. Ionic solids
3. Non polar molecular solid
4. Metallic solids
1. Covalent or network solid
2. Ionic solids
3. Non polar molecular solid
4. Metallic solids
Subtopic: Introduction & Crystal System |
62%
From NCERT
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Ionic solids conduct electricity in molten state but not in solid state because-
| 1. | In molten state, electricity is conducted by ions |
| 2. | In molten state, electricity is conducted by free electrons |
| 3. | In molten state, electricity is conducted by Pie electrons |
| 4. | None of the above |
Subtopic: Introduction & Crystal System |
62%
From NCERT
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Conductor, malleable and ductile solid among the following is -
1. Covalent or Network Solids
2. Molecular Solids
3. Metallic Solids
4. Ionic Solids
1. Covalent or Network Solids
2. Molecular Solids
3. Metallic Solids
4. Ionic Solids
Subtopic: Introduction & Crystal System |
81%
From NCERT
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The significance of a ‘lattice point’ is-
| 1. | Each lattice point represents octahedral void |
| 2. | Generally, each lattice point represents one unit cell in a solid |
| 3. | Each lattice point represents one constituent particle of a solid |
| 4. | Each lattice point represents tetrahedral void |
Subtopic: Introduction & Crystal System |
66%
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