ECAT Pre General Science Physics Chapter 17 Physics of Solids Online Test With Answers

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ECAT Pre General Science Physics Chapter 17 Physics of Solids Online Test

Sr. # Questions Answers Choice
1 Tick the one which is not polymer solid:
 Zirconia Polythene Nylon Synthetic rubber None of these
2 Polymers are the chemical combination of carbon with: Nitrogen Oxygen Hydrogen All of these None of these
3 Examples of crystalline solids are: Cooper NaCl Zirconia Both (A) and (B) All of these
4 Examples of polymeric substances are: Plastic Synthetic rubbers Zirconia All of these Both (A) and (B)
5 A structure of polymeric solid is: An ordered structure A disordered structure Intermediate between order and disorder Any of these None of these
6 When relatively simple molecules are chemically combined into massive molecules, the reaction is called: Fission reaction Fusion reaction Polymerization Any of these None of these
7 Each atom in metal crystal: Remains fixed Vibrates about a fixed point Moves randomly Rotates about center of a crystal None of these
8 The smallest three dimensional basic structure is called as: An atom Unit cell Crystal lattice Polymer None of these
9 In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of: Adhesive force Nuclear forces Inter atomic cohesive force Electromagnetic force None of these
10 The pattern of NaCl particles have a shape which is : Cubic Body centred cubic Simple cubic face centred Both (A) and (C)
11 The whole structure obtained by the repetition of unit cells is called: Crystal lattice Amorphous solid Polymeric solid Polysterne None of these
12 The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called: Critical temparature Temperature of vaporization Melting point Both (A) and (C) Both (A) and (B)
13 Tick the one which is not a crystalline solid: Zirconia Glass Copper Ceramic solid An ionic compound
14 A unit cell is smallest basic structure which is: One dimensional Two dimensional Three dimensional Four dimensional None of these
15 The arrangement or molecules or atoms in a crystalline solid can be studied by using: Chemical methods Neutrons X-ray techniques Copper atoms Both (A) and (B)
16 An ordinary glass gradually softens into a 'paste -like' state before it becomes a very viscous liquid. It happens almost at: 800<sup>o</sup>C 500<sup>o</sup>C 300<sup>o</sup>C 100<sup>o</sup>C None of these
17 In a cubic crystal, All solids meet at: 60<sup>o</sup> 90<sup>o</sup> 109<sup>o</sup> 30<sup>o</sup> 10<sup>o</sup>
18 The pattern of crystalline solid is: One dimesional Two dimensional Three dimensional None of these Either (A) or (B)
19 Amorphous solids: Have definite melting points Are called glassy solids Have no definite melting point Both (B) and (C) Both (A) and (C)
20 The word amorphous means: Without any structure With definite structure Regular arrangement of molecules Both (B) and (C) None of these
21 The force which maintain the strict long-range order between atoms of a crystalline solid is the: Nuclear force Cohesive force Adhesive force Coulomb force None of these
22 The transition from solid state to liquid state is: Abrupt Slow Continous Discontinous Both (A) and (D)
23 The transition from solid to liquid is actually from: Order to disorder Disorder to order Order to order Disorder to disorder None of these
24 Each atom in a metal crystal vibrates about a fixed point with an amplitude that: Decrease the rise in temprature Is not affected by rise in temprature Increase with rise in temprature Both (B) and (C) None of these
25 Zirconia is classified as: Ceramic solid Ionic compound Metal Either (A) or (B) Either (B) or (C)
26 The solids are classified as: Metals Crystalline Amorphous Polymeric All except (A)
27 Crystalline solids are in the form of: Metals Ionic Compounds Ceramics Both (A) and (B) All of these
28 In the phenomenon of hysteresis magnetism leads the magnetising current magnetism lags behind the magnetising current meganetism goes along the magnetising current none of them
29 The curie temperature of iron is about 250<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 500<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 750<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
30 Above the curie temperature, iron becomes ferromagnetic paramagnetic diamagnetic any one of them
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