Rajasthan Board Varishtha Upadhyaya Question Paper 2020 General Science

 Roll No.

No. of Questions – 30
No. of Printed Pages – 7

  ( ) (GENERAL SCIENCE)
  , 2020
 3¼ 
  56

     :
GENERAL INSTRUCTION TO THE EXAMINEES :

(1)    -     
Candidate must write first his / her Roll No. on the questions paper compulsory.

(2)      
All the questions are compulsory.

(3)       -    
Write the answer to each question in the given answer-book only.

(4)      ,         
For questions having more than one part the answers to those parts are to be written
together in continuity.

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(5) -           //  
       
If there is any error/difference/contradiction in Hindi & English version of the
question paper, the question of the Hindi version should be treated valid.

(6)      
 1- 13 1
 14-24 2
 25-27 3
 28-30 4
Section Q. Nos. Marks per Question
A 1- 13 1
B 14-24 2
C 25-27 3
D 28-30 4

(7)   28  30     
There are internal choice in Question Nos. 28 to 30.

-
SECTION - A

1.      
Define magnetic flux. 1

2.           
Write the difference between moving magnet galvanometer and moving coil
galvanometer. 1

3.     
Write Lenz’s law. 1

4.         
Write any one example of electron deficient compound. 1

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5.     
Write the definition of fertilization. 1

6.        
Write the types of inflorescence of malvaceae family. 1

7.         
Write relation between half life and mean life. 1

8.           
Write the value of maximum efficiency of a full wave rectifier circuit. 1

9.  N2(g) + 3 H2(g) 2NH3(g)     (Kc)    

Write expression for equilibrium constant (Kc) for the reaction

N2(g) + 3 H2(g) 2NH3(g). 1

10.        
Write any one example of thermosetting polymer. 1

11.         
Write main difference between endocrine and exocrine glands. 1

12.            
Write botanical name of medicinal plant used in the high blood pressure regulation. 1

13.           ?
Morphine alkaloids are derived from which medicinal plant ? 1

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-
SECTION - B

14.     5  10–4 C   2.25 N           
 
A force of 2.25 N acts on the charge 5  10–4 C located in the electric field. Calculate the
intensity of electric field. 2

15.              
Derive the formula to find the internal resistance of the primary cell by a potentiometer. 2

16.                
 = o sin t   

Derive an expression  = o sin t of induced emf due to rotating coil in a uniform
magnetic field. 2

17. sp3      

Explain sp3 hybridisation with an example. 2

18.            
Explain gravity separation method used for concentration of ores. 2

19.               
Write any two differences between internal structure of monocot and dicot stem. 1+1=2

20.         
Write any two differences between transpiration and evaporation. 2

21.       
Explain digestive system of earthworm. 2

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22. P-  N-        

Write any two differences between P-type and N-type semiconductors. 2

23.   () []    (r)     
Establish a relation between magnetic susceptibility [] and relative permittivity (r). 2

24.      
     
()  (I) 
() 
  (II) 
()   (III) 
()  (IV) 
Match the following : ½+½+½+½=2
Name of Ore Name of metal

(A) Siderite (I) Copper
(B) Malachite (II) Aluminium
(C) Calamine (III) Iron
(D) Cryolite (IV) Zinc

-
SECTION - C
25.     ?         
What is common ion effect ? Explain the application of common ion effect in qualitative
analysis. 1+2=3

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26. ()         
(i)  (ii)  – 6, 6
()          
(A) Write the name of monomer units of following polymers.
(i) Terylene (ii) Nylon-6, 6
(B) Write the name of polymer used in making rain coat. 1+1+1=3

27. ()            
()            
(A) Write the name of enzyme, used in the conversion of starch into maltose.
(B) Explain the transportation of oxygen and carbon dioxide in respiration mechanism.
1+1+1=3

-
SECTION - D
28. ()     
()          
()            

()     
() X-       
() -      
(A) Write definition of isotope.
(B) Write any two postulates of Bohr’s atomic model.
(C) Draw a labelled diagram of discharge tube for production of positive rays. 1+2+1=4
OR
(A) Define radioactivity.
(B) Explain any two uses of X-rays.
(C) Draw a labelled diagram of Davission – Germer experiment.

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29. ()               
()  C4H10           

()            
()  C4H8           
(A) Define homologous series. Write two examples of homologous series of alkanes.
(B) Draw the structures of chain isomers of molecular formula C4H10 and write their
names. 1+1+1+1=4
OR
(A) Define isomerism. Write the name of types of isomerism.
(B) Draw the structures of chain isomers of molecular formula C4H8 and write their
names.

30. ()    ,      ?
()          
()         

()         
()        
()          
(A) Why hormones of adrenal gland are life saving hormones ?
(B) Draw a labelled diagram of male reproductive system of human.
(C) Draw a labelled diagram structure of spermatogenesis. 1+1+2=4
OR
(A) Write the function of secreted hormones by thyroid gland.
(B) Draw a labelled diagram structure of nephron.
(C) Draw a labelled diagram of mechanism of fertilization in mammals.
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VU-56-Gen. Science [ Turn over

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