Chhattisgarh Board Of Secondary Education, Raipur  

Academic Session 2020-21

Month- September 

Assignment - 1  

Class - 12th  

Subject - English

Instruction :- Please attempt the questions as per given instructions.  

Questions	Marks	Word limit
Q. 1	4	75-100
Q. 2	4	75-100
Q. 3	4	75-100
Q. 4	4	75-100
Q. 5	2+2 = 4	50

Q.1- What was the scene in school on the morning of the last lesson. How was it different  from that on other days?

Q.2- Draw the character sketch of M. Hamel.

Q. 3- Draw the character sketch of Franz?

Q. 4- Why are the young trees described as sprinting in poem “My mother at sixty six”?  

Q. 5- Read the following passage carefully and answer the questions given below it in  about 50 words each.  

India is a land of farmers who are very simple and hard working. Their only  wealth is their land. If their crops fail they run into debt and lead a miserable life. They  are mostly uneducated. They are not familiar with the new implements and improved  methods of farming. They use the same kind of plough as was used many centuries  ago. Our government is trying its best to improve the lot of the farmers. They are  encouraged to use modern implements good seeds and manures. They are given loans  at low rate of interest. Development blocks have been opened all over the country. The  blocks supply superior seeds and good manure.  

Questions:-  

 (a) Describe the farmers of India.  

 (b) How does our government encourage the farmers? 

Subject - Physics

Questions	Marks	Word limit
Q. 1	2 + 2 = 4	75-150
Q. 2	3 + 1 = 4	75-150
Q. 3	2 + 2 = 4	75-150
Q. 4	2 + 2 = 4	75-150
Q. 5	2 + 2 = 4	75-150

Instruction:- Please attempt the questions as per given instructions.

Q.1 (i) Name the physical quantity of unit N/C. Also mention that is it a vector or a scalar  quantity

(ii) Write the definition and dimensional formula of the physical quantity of unit  farad.

Q.2 The capacitance of a parallel plate capacitor having air between its plates is 10 μf. if  the distance between the plates is reduced to half and the medium between plates is  replaced by a medium of dielectric constant k=5, then find the value how much  increase or decrease will be there in the capacitance of the capacitor.

Q.3 A positive point charge (+q) is kept near a charged plate.  

(i) Draw the electric field lines of forces from point charge to the plate. 

(ii) Derive an expression for the electric field intensity at the surface of the plate.

Q. 4 Two point charge q_P =+2μC and  q_Q  =-2μC are placed at a distance of 10 cm in  air/vacuum.  

(a) Calculate the electric field intensity along the center of line joining the two  charges. 

(   (b) If a test charge   q_R  = -1.2 X 10^-9 placed at center of the PQ write the value of  force acting on test charge  q_R  and its direction. 

        

    Q. 5 Mention two differences between potential due to a point charge and potential due to an  electric dipole. Also derive an expression for the electric potential at a point on the  extended axis of an electric dipole.

Subject - Chemistry

Questions	Marks	Word limit
Q. 1	4	75-150
Q. 2	4	75-150
Q. 3	4	75-150
Q. 4	4	75-150
Q. 5	4	75-150

Instruction: - Please attempt the questions as per given instructions.

Q. 1 How will you distinguish between : - (i) Crystal lattice and Unit cell. (ii) Tetrahedral void and Octahedral void.

Q. 2 Calculate the mass percentage of benzene (C₆H₆) and carbon tetra chloride (CCl₄) if 22 gm of benzene is dissolved in 122 gm of carbon tetra chloride.

    Q.3 Define the term solution. How many types of solutions are formed. Write briefly about each type with an example.

    

    Q. 4 Define the following. (i) Specific Conductance. (ii) Molar Conductance.

    

    Q. 5 What is Kohlrauschs law ? Write its two applications.  

Subject - Biology

Questions	Marks	Word limit
Q. 1	3	50-75
Q. 2	3	50-75
Q. 3	4	75-100
Q. 4	5	100-150
Q. 5	5	100-150

    

    Instruction:- Please attempt the questions as per given instructions.

     

  Q.1 Draw a neat and clean, well labelled diagram of typical angiospermic ovule showing different parts?

   

    Q. 2 What is double fertilization and triple fusion ? Name the nuclei involved in triple fusion?

 

    Q. 3 What is parturition ? which hormones are involved in induction of parturition.

    Write the function of each of the following

    (a) Testes     (b) Ovary

  Q. 4 What is spermatogenesis ? write the names of hormones involved in it. Describe this process with the help of diagram.

   Q. 5 Name the chemical substance present in exine and intine of pollen grain- Draw a diagram of pollen grain and label following parts.

    (i) Exine                  (ii) intine

    (iii) Vegetative cell   (iv) Germinal cell

Subject - Economics

Questions	Marks	Word limit
Q. 1	3	75-100
Q. 2	3	75-100
Q. 3	4	75-100
Q. 4	5	75-100
Q. 5	5	75-100

Instruction:- Please attempt the questions as per given instructions.

Q. 1 Explain opportunity cost with the help of Production Possibility Curve.

Q . 2 Discuss the central problems of economy.

Q. 3 Write the differences between micro and macro economics.

Q. 4 Explain the Production Possibility Curve with the help of schedule and diagram.

Q. 5 Explain the various types of economy or various type of economic systems.

 

Official website Click the link below-

https://cgbse.nic.in/assig12.aspx

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