10th Science - Public Exam 2022 - Original Question Papers with Answer Keys

Govt Exam - May 2022

10^th - Science

[Time Allowed : 3.00 Hours ]                                                                            [Maximum Marks : 75]

Instructions :  1) Check the question paper for fairness of printing. If there is any lack of fairness, inform the Hall Supervisor immediately.

                        2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

                                                              PART - I                                                  12×1=12

Note :  (i)  Answer all the questions.

(ii) Choose the most appropriate answer from the given four alternatives and write the option code and the corresponding answer.

 1. Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens?

      a) f                            b) infinity

      c) 2f                         d) between f and 2f

 

 2. If a molecule is made of similar kind of atoms, then it is called ________ molecule.

      a) Mono atomic           b) hetero atomic       

      c) homo atomic        d) poly atomic

 

 3. The number of components in a binary solution is _________ .

      a) 2                          b) 3

      c) 4                           d) 5

 

 4. A charge of 12 coulomb flows through a bulb in 5 second. What is the current through the bulb?

      a) 60 A                      b) 17 A

      c) 2.4 A                     d) 24 A

 

 5. Rectified spirit is an aqueous solution which contains about _______ of ethanol.

      a) 95.5 %                b) 75.5 %

      c) 55.5 %                  d) 45.5 %

 

 6.  The endarch condition is the characteristic feature of _______ .

      a) root                       b) stem

      c) leaves                    d) flowers

 

 7. The heart of fishes possess _________ chambers.

      a) 3                           b) 4

      c) 2                           d) 5

 

 8. Male gametes in angiosperms are formed by the division of _________ .

      a) Generative cell

      b) Vegetative cell

      c) Pollen grain mother cell

      d) Microspore

 

 9. Which one is referred as “Master Gland”?

      a) Pineal gland            b) Pituitary gland

      c) Thyroid gland         d) Adrenal gland

 

10.  Himgiri developed by hybridization and selection for disease resistance against rust pathogens is a variety of ________ .

      a) chilli                      b) maize

       c) sugarcane              d) wheat

 

11. Match the following :

      (1) Solar Energy                 (i) Flowing water

       (2) Petroleum                    (ii) Mobile phone

       (3) Hydropower                (iii) Inexhaustible energy

       (4) Electronic device        (iv) Exhaustible energy resource

      a) (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)

      b) (1) - (iii), (2) - (iv), (3) - (i), (4) - (ii)

      c) (1) - (iii), (2) - (i), (3) - (iv), (4) - (ii)

      d) (1) - (i), (2) - (iv), (3) - (ii), (4) - (iii)

 

12. Find the correct pair :

      a) Gregor Johann Mendel       -         Theory of Natural Selection

      b) Waldeyer                         -         Chromosomes

      c) Watson and Crick              -         Theory of Evolution

      d) Jean Baptiste Lamarck       -         Law of Heredity

 

PART - II

Note : Answer any seven of the following. Question No. 22 is compulsory.                       7×2=14

13.   State Newton’s second law. Unit - 1

14.   Write any two applications of echo. Unit - 5

15.   State Boyle’s Law. Unit - 3

16.   Write the functional group and the suffix used for the following class of compounds. Unit - 11

Class of Compounds	Functional Group	Suffix used
Alcohol
Aldehyde
Ketone
Carboxylic Acid

17.   What is the importance of rainwater harvesting? Unit - 22

18.   Identify the parts A, B, C, D in the given figure.  Unit - 16

19.   What is evolution? Who proposed the theories of evolution? Unit - 19

20.   Name the two maize hybrids rich in amino acid lysine. Unit - 20

21.   What is the importance of valves in the heart? Unit - 14

22.  A person with myopia can see objects placed at a distance of 4 m. If he wants to see objects at a distance of 20 m, what should be the focal length and power of the concave lens he
must wear? Unit - 2

 

PART - III

Note : Answer any seven of the following. Question No. 32 is compulsory.           7×4=28

23.   Differentiate mass and weight. Unit - 1

24.   List any four properties of light. Unit - 2

25.   Explain why the ceilings of concert halls are curved? Unit - 5

26.   (a) What is an alloy? Unit - 8

        (b) Give the reasons for alloying. Unit - 8

27.  Classify the following compounds based on the pattern of carbon chain and give their structural formula : Unit - 11

        (i) Propane                      (ii) Benzene

        (iii) Cyclobutane             (iv) Furan 

28.   (a) What is respiratory quotient? Unit - 12

        (b) Write the overall reaction for photosynthesis. Unit - 12

29.   (a) Draw and label the parts of process of transpiration. Unit - 14

        |(b) Draw the pictures of Granulocytes. Unit - 14

30.   (a) List the theories postulated to explain the origin of life. Unit - 19

        (b) Who coined the term ‘Ethnobotany’? Unit - 19

31.   Discuss the importance of biotechnology in the field of medicine. Unit - 20

32. ‘A’ is a blue coloured crystalline salt. On heating it loses blue colour and gives ‘B’. When water is added, ‘B’ gives back ‘A’. Identify ‘A’ and ‘B’. Write the equation. Unit - 9

 

PART - IV

Note : Answer all the questions. Draw diagrams wherever necessary.       3×7=21

33.   (a)  (i) What is meant by electric current? Unit - 4

             (ii) Name and define its unit. Unit - 4

 (iii) Which instrument is used to measure the electric current? How should it be connected in a circuit Unit - 4  

(OR)

        (b)  (i) Who discovered natural radioactivity? Unit - 6

             (ii) Write any three features of natural and artificial radioactivity. Unit - 6

            (iii) Give any three uses of radio isotopes in the field of agriculture. Unit - 6

 

34.   (a)  (i) Define : Atomicity. Give an example. Unit - 7

             (ii) Consolidate the major differences between atoms and molecules. Unit - 7

(OR)

        (b)  (i) Define combination reaction. Unit - 10

             (ii) Give an example for combination reaction. Unit - 10

            (iii) Differentiate reversible and irreversible reaction. Unit - 10

 

35.   (a) (i) What are synthetic auxins? Give examples. Unit - 16

             (ii) Define triple fusion. Unit - 17

            (iii) Name the secondary sex organs in male. Unit - 17

(OR)

        (b) (i) Why did Mendel select pea plant for his experiment? Unit - 18

             (ii) Suggest measures to overcome the problems of an alcoholic. Unit - 21