CHEMISTRY IMPORTANT QUESTIONS FOR CLASS 12th

 CHEMISTRY IMPORTANT QUESTIONS FOR CLASS 12th

chapter -1                                 solid state



Question no. : 1


Why are solids hard and why are their volume fixed ?

Question no. : 2


What are lattice points ? Explain


Question no. : 3


What is a shotkey error Explain by appropriate example.

Question no. : 4


What is a unit cell called ?

Question no. : 5


What are crystal lattice point defects How many types are there ?

Question no. : 6


Depending on the geometry of the crystal which seven basic types of crystals – which are ?

Question no. : 7


Distinguish between quadrilateral vacuum and octahedral vacancies

Question no. : 8


Explain the following 

      a)    Interstellar b) F – Center          

Question no. : 9


How many types of crystals are there Explain

Question no. : 10


Explain the following 

      a) iron magnetism b) anucumbakatva                     

Question no. : 11


What effect does the shot defect have on the density of matter  ?

Question no. : 12


What is the coordination number samajhaiyem  ?

Question no. : 13


What is Frankel’s fault explain by giving two examples  ?

Question no. : 14


What effect does heat increase have on the conductivity of semiconductors  ?

Question no. : 15


Write the difference between Frankl and Shotki’s fault  ?

Question no. : 16


What is cutasphalakiya and octahedral spaces they explain the importance  ?

Question no. : 17


What are interstitial vacancies  ?

Question no. : 18


Write the difference between crystalline and non-crystalline solids  ?

Question no. : 19


Write a comment on the following.

  1. Metal excess defects 
  2. Equatorial vacancies 

Question no. : 20


Carbon dioxide is a molecular solid, while silic is a covalent solid. Why  ?

Question no. : 21


Write the symptoms of ionic solids  ?

Question no. : 22


What is a cell, write its types  ?

Question no. : 23


 Calculate the density of a unit cell  ?

Question no. : 24


Write the characteristics of covalent solid  ?

Question no. : 25


Write the types of semiconductors.


Question no. : 1


  1. Ordinary salt sometimes looks yellow instead of colorless why ?
  2. Pure alkaline metal halides do not show Frenkel defects, why? 

Question no. : 2


What is the effect of heat on the conductivity of metals and semiconductors?

Question no. : 3


Find the number of atoms in a single cell of the following types of crystals.

      i) Ordinary cubic crystals or SCC    

      ii) What a focused BCC   

      iii) Panel centered or FCC   

Question no. : 4


Explain why ions are conductors of electricity in solid state but not in solid state .

Question no. : 5


Give reasons 

      i) zno is white in color but when heated it turns yellow.    

      ii) The coordinate number of   Na + in NaCl crystal is .     

Question no. : 6


Explain the difference between crystalline and non-crystalline solids.

Question no. : 7


Explain the following in a defective crystal 

      (a) What is vacuum defect and intraocular defect ?   

      (b) What effect does the above defects have on the density of the crystal ?   

Question no. : 8


  1. Explain why old glass windows get thick on the floor?
  2. Ionic solids that have negative vacuoles due to metal – excess defects are colored. Explain this with the help of suitable example.   Explain the above two types of defects with examples. 

Question no. : 9


Fractal defect does not affect the density of solids whereas in shorty defect the density of solids decreases. Why?

Question no. : 10


Carbon dioxide is an atomic solid while silica is a compound why ?


Question no. : 11


Placing a non-magnetic substance in a magnetic field increases its weight why?

Question no. : 12


Which is the point defect in which there is no effect on the density of the solid and the other type of defect in which the density of the solid decreases Explain the reasons and explain both the above types of defects with examples. Need a new ad?

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