Science Exam: 12th Grade Quiz!

11 Questions | Total Attempts: 524

SettingsSettingsSettings
Science Exam: 12th Grade Quiz! - Quiz

.


Questions and Answers
  • 1. 
    Which of the following condition favors the existence of a substance in the solid-state?
    • A. 

      High temperature

    • B. 

      Low temperature

    • C. 

      High thermal energy

    • D. 

      Weak cohesive forces

  • 2. 
    Which of the following is not a characteristic of a crystalline solid?
    • A. 

      Definite and characteristic heat of fusion

    • B. 

      Isotropic nature

    • C. 

      A regular periodically repeated pattern of arrangement of constituent particles in the entire crystal

    • D. 

      A true solid

  • 3. 
    Which of the following is an amorphous solid?
    • A. 

      Graphite

    • B. 

      Quartz glass

    • C. 

      Chrome alum

    • D. 

      Silicon carbide

  • 4. 
    Which of the following is true about the value of the refractive index of quartz glass?
    • A. 

      Same in all directions

    • B. 

      Different in different directions

    • C. 

      Cannot be measured

    • D. 

      Always zero

  • 5. 
    Which of the following statement is not true about amorphous solids?
    • A. 

      On heating they may become crystalline at certain temperature

    • B. 

      They may become crystalline on keeping for a long time

    • C. 

      Amorphous solids can be moulded by heating

    • D. 

      They are anisotropic in nature

  • 6. 
    The sharp melting point of crystalline solids is due to
    • A. 

      A regular arrangement of constituent particles observed over a short distance in the crystal lattice

    • B. 

      A regular arrangement of constituent particles observed over a long distance in the crystal lattice

    • C. 

      Same arrangement of constituent particles in different directions

    • D. 

      Different arrangement of constituent particles in different directions

  • 7. 
    Iodine molecules are held in the crystals lattice by:
    • A. 

      London forces

    • B. 

      Dipole-dipole interactions

    • C. 

      Covalent bonds 

    • D. 

      Coulombic forces

  • 8. 
    Which of the following is a network solid?
    • A. 

      S0​​​​​2

    • B. 

      I​​​​​​2

    • C. 

      Diamond

    • D. 

      H​​​​​​2​​​​​O

  • 9. 
     The total number of tetrahedral voids in the face-centered unit cell is:
    • A. 

      6

    • B. 

      10

    • C. 

      8

    • D. 

      12

  • 10. 
    Which of the following point defects are shown by AgBr (s) crystals? (A) Schottky defect (B) Frenkel defect (C) Metal excess defect (D) Metal deficiency defect
    • A. 

      A and B

    • B. 

      C and D

    • C. 

      A and C

    • D. 

      B and D

  • 11. 
    The percentage of empty space in a body-centered cubic arrangement is:
    • A. 

      74

    • B. 

      68

    • C. 

      32

    • D. 

      26

Back to Top Back to top