worksheet on State of matter





The most common states of matter on Earth are Solid, Liquid and Gas. However,  most of the part of universe is in the form of hot plasma.

Hence, the distinction of matter is done based on the qualitative differences in bulk properties. The state of matter can change depending on the pressure, temperature etc.

 

In this article you can find some questions related to State of Matter and their answers:

 

Questions:

1. Crystals can be divided into:

(a)    9 categories

(b)   7 categories

(c)    5 categories

(d)   8 categories

 

2. Point defects are present is:

(a)    Ionic solid

(b)   Liquids

(c)    Amorphous solid

(d)   Molecular solid

 

3. In cubic close packed lattice of sphere, the volume space occupied is:

(a)    52.4%

(b)   74%

(c)    68%

(d)   60%

 

4. Schottky defect is likely to be found in:

(a)    ZnS

(b)   NaCl

(c)    ZnO

(d)   AgBr

 

5. Mark the false statement:

(a)    CsCl crystal shows Schottky defect

(b)   Photo sensitivity of AgBr is due to the presence of Frankel defect in its crystal

(c)    Crystals having F-centers are coloured and paramagnetic

(d)   None of these

 

6. Non – stochiometric metal deficiency are shown in the salts of:

(a)    Alkali metals only

(b)   Alkaline earth metals only

(c)    Metals only

(d)   Transition metals only

 

7. The unit Cell with crystal parameters:

a \neq c, \alpha = \beta = \gamma = 90^0 is:

(a)    Triclinic

(b)   Tetragonal

(c)    Ortho rhombic

(d)   Monoclinic

 

8. Which one of the following is a two dimensional covalent solid ?

(a)    Graphite

(b)   Pure germanium

(c)    Quartz

(d)   Carborundum

 

9. The correct statement regarding liquid state is:

(a)    A liquid resembles a gas near the critical temperature of the gas

(b)   A liquid gas short range order and long range disorder

(c)    A liquid resembles a solid near the melting point of the solid

(d)   All of the above

 

10. The best potential model to represent attraction and repulsion between molecules of liquids is:

(a)    Rigid sphere model

(b)   Lennard-Jones 6-12 potential model

(c)    Beattie Bridgemann model

(d)   Sutherland model

 

11. CCI_4 is an example of:

(a)    Hydrogen bonded liquid

(b)   Ionic liquid

(c)    Molecular liquid

(d)   None of these

 

12. Evaporation of a liquid depends on:

(a)    Surface area

(b)   Intermolecular attractive forces

(c)    Temperature

(d)   All the above

 

13. The ratio of molar heats of vapourisation and boiling point of a liquid is constant (nearly 21 cal K^{-1} mol^{-1}) This is known as:

(a)    Trouton’s rule

(b)   Ostwald’s rule

(c)    Vant Hoff rule

(d)   Phase rule

 

14. Water drops stick to a glass surface due to:

(a)    Flocculation

(b)   Adhesion

(c)    Cohesion

(d)   None of these

 

15. A surface active substance is:

(a)    Alcohol

(b)   Soap

(c)    Cholesterol

(d)   All

 

16. The most viscous liquid among the following is:

(a)    Alcohol

(b)   Water

(c)    Glycerol

(d)   Benzene

 

17. The increase of temperature, causes:

(a)    A decrease in viscosity of the liquid

(b)   No effect on the viscosity of the liquid

(c)    Only slight increase in the viscosity of the liquid

(d)   An increase in viscosity of the liquid

 

18. The free surface of a liquid has a tendency to contract and minimize its surface area. This tendency is due to:

(a)    Elasticity

(b)   Friction

(c)    Surface tension

(d)   Viscosity

 

19. The surface tension of a liquid:

(a)    Decreases with area

(b)   Increases with temperature

(c)    Increases with area

(d)   Decreases with temperature

 

20. Which of the following molecules has the highest velocity?

(a)    HF (l)

(b)   H_3PO_4 (l)

(c)    CH_2OH.CH_2OH (l)

(d)   Br_2 (l)

 

21. The velocity of a falling raindrop attains a limiting value because of:

(a)    The surface-tension effect

(b)   The viscous forces exerted by air

(c)    Air currents in the atmosphere

(d)   The up-thrust of air

 

22. A small steel ball falls through water more slowly than through air primarily because:

(a)    Of smaller density difference

(b)   The value of being lesser in water

(c)    Of viscous force

(d)   Of surface-tension effect

 

23. Molecular crystals are subdivided into:

(a)    Metallic crystals and alloys

(b)   Ionic crystals and polymers

(c)    van der Waals crystals and hydrogen-bonded crystals

(d)   covalent and nonmetallic networks

 

24. SiO_2 belongs to the:

(a)    Tetragonal system

(b)   Rhombohedral system

(c)    Hexagonal system

(d)   Orthorhombic system

 

25. On the basis of its unit-cell structure, NaHCO_3 , belongs to the:

(a)    Cubic system

(b)   Monoclinic system

(c)     Tetragonal system

(d)   Triclinic system

 

Answers

1.(c)        2. (d)        3. (b)        4. (a)            5. (a)

6. (c)       7. (d)        8. (a)        9. (a)          10. (c)

11. (a)     12. (a)      13. (d)       14. (c)         15. (c)

16. (b)     17. (d)     18. (a)       19. (b)          20. (d)

21. (b)     22. (c)     23. (a)       24. (c)        25. (a)



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