Karnataka SSLC Preparatory Exam Question Paper 2022 Science

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KARNATAKA ETruCATION EX(AIIIINATION BOARD,
6th cRoss, MALLESHwARAIII, BANGALoRE - 560 oo3

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STATE LEVEL SSLC PREPARATORY EXAMtrNATION,
FEBRUARY 2022
iof,ed ioa3o : 83-E Codc No. 3 83-E

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Subject : SCIENCE
(zpa agad, dxaoS:d C5ad d:{ 8ed apd / Physics, Chemistry &. Biology )

1 aoflaio 6ruCod> / English Medium )
Boaod :26. 02.20221 I Oate :26. 02.2022
d&o$ : a3$f, 10-30 ood a$qtrdq 1-45 dddri ] [rime : 10-30 A.M. to 1-45 P.M.
rlod erodrls: : 80 ] Itutur. Marks : 8o

General Instructions to the Candidate :
1. There are three parts in the question paper :

PartA: Physics, PartB: Chemistry, PartC: Biology.
2. This Question Paper consists of objective and subjective types of
38 questions.
3. Follow the instructions given against both the objective and subjective
types of questions.
4. Figures in the right hand margin indicate ma-ximum marks for the
questions.
5. The maximum time to answer the paper is given at the top of the question
paper. It includes 15 minutes for reading the question paper.

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}IAR'E . A

{FE$.}:SICS }

Four alternatives &r'e gi'uen f,or each of the
following questions I
I.
and write the
incomplete statemaexnts" 6:!:r:sse the correct alternative

eomptr'eteans$lera!-ongpr:i'thitsletterofalphabet.3xl=3

. ffr" material used in Lhe fiiament of an electric bulb is

(A) sodiurn (B) coPPer

(C) tungsten r (D) aluminium.

2,.' In Fleming,s right hancl rul.e, the forefinger indiiates the
direction

of

(A) motion of the t :nductor

(B) magnetic {ield '

(C) induced electric current

(D) electric field.

is
3. The pcwer of a lens ''"ith one metre focal length

(A) one dioPtre (B) one volt

(C) one centimetrr (D) one watt.

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3 ES.E

Answer the following questions : 2*xL=2

Which mirror is used as a rear view mirror in the vehicles ?

5. Mention the nature of the image formed when the magnification of

the image of an object formed by a spherical mirror has negative

value.

III. Answer the following questions : 3x2=6
6. An electric refrigerator rated 500 W operates 8 hours a clay. \,VhaL is

the cost of the ener5r to operate it for 30 days at Rs. 5 per one kwh ?

a{ Draw the diagram of a simple electric motor and label the 'brushes'.

8. State the laws of reflection of light.

fV. Answer the following questions : 3x3=9

Mention the function of the following devices :

i) Electric fuse

iil Galvanometer

iii) Electric generator.

OR

a) List the properties of magnetic field lines.

b) What is a solenoid ?

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83-E 4

tP/ Draw the ray diagram of image formed when the object is kept
between Ft and 2F, of the convex lens. With the help of the

diagram, rnention the position and the nature of the image formed.

I Fr ' Principal focus of the lens ]

11. What is biomass ? What are the advantages of using the biogas ?

v. Answerthe followingquestions: 2x4= 8
12. a)-/- State Ohm's law. Mention the factors on which the resistance
of a conductor depends.

b) The potential difference between the terminals of an electric
heater is 6O V, when it draws a current of 4 A from the source.

What current will the heater draw if the potential difference is
increased to 120 V ?

OR

e) State Joule's law of heating.

b) An electric bulb is connected to a 22O V generator. The current
is 2A. Find the 'power'and 'resistance'of the bulb.

13. a) Frnd the focal length of a convex mirror that has a radius of
curvature 32 cm.

An object 4 cm in height is placed at 25 cm in front of a
/
concave mirror of focal length 15 cm. At rvhat distance lrom
the mirror should a screen be placed in order to obtain a sharp
image ? Write the nature of the image formed.

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5 8&-S

PART " B

( cHErvlES"RY )

VI. Fawr aXternatives are gir,ren for eaeh of the fo!,lowing q.u*sti,$:rs i

incomnplete statersterats. Choose the correct altenaative a.:rrl sirrit* the

eomrplete answer along rrflth its letter of alphabet. S >: tr .. ii

14. The acicl present in the lemon is .

iA) ta-r'taric acid (B) methanoic acid

{Cl crtric acid (D) lactic acid'

15' ZnO + C ----> Zn + CO, the substance that undergoe:i redilcircn

- in this ch,ernical reaction is

(AI C' (B) Zno
(C) Zrt (D) CO.

16. The eiernents sodium, Magnesium, Aluminium and tiiiicorr are
placed in the sarne period in the modern periodic tabie having the

atomic numbers l1 , 12, 13 and 14 respectively. The el{rment thiit

has the smallest atomic siZe is.

(A) sodiurn (B) magnesium
(C) aluminiurn (D) silicon.,

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VII. Answer the following questions : 3x1=3

\,7. What is catenation ?

18. What are exothermic reactions ? '

lY Aluminium oxide is called an'amphoteric oxide'. Why ?

VIII. Answer the following questions : 3x2=6

2/k-'List any two uses of 'bleaching powder'and 'baking soda'.
-j

OR

How is tooth decay caused in humans ? How can it be prevented ?

,/4!
Write any four physical properties of metals.

OR

List any four general properties of ionic compounds.

2/ Draw the diagram to show the arrangement of apparatus used for

testing the conductivity of a salt solution and label 'graphite rod''

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7 83-E

IX. Answer the following questions : 3x3=9

23. Write tJle balanced chemical equations for the following chemical

reactions :

a) Iron sulphate Heat , Iron oxide + Sulphur dioxide

+ Sulphur trioxide

b) Sodium sulphate + Barium chloride -------+ Barium sulphate

+ Sodium chloride

c) Copper + Oxygen
Heat , Copper oxide.

OR

Write the balanced chemical equations for the following chemical

reactions :

a) Hydrogen gas reacts with chlorine gas to form hydrogen

chloride.

b) Potassium metal reacts with water to produce potassium

hydroxide and hydrogen gas.

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z*t

83-E B

24. Draw the diagram of the arrangement of apparatus to shorv the
reaction of zinc granules with dilute sulphuric acid and testing the
hydrogen gas by burning. Label the.following parts :

il Zinc granuies

ii) Delivery tube.

25. State Mendeleev's periodic lri'w. XVrite any tn'o iimitations of
Mencieleev's periodic table.

X. Answerthefollowingquestion: Lx4=4
2d Write the molecular formula and structural arrangernent of the
following compounds :

a) Ethene bi Ivlethane

c) Benzene d) Propanol.

PART . C

{ BroLoGY }

XI. ?our alternatives are given for each of the following questions I
incomplete statements. Choose the correct alternative and v.rrite the '

complete answer along with its letter of alphabet. 2xL=2

27':' The hormone responsible for the good grcwttr o1'lr"uits and seeds in
plants is

(A) gibbereilin, (B) cytokinin
(C) abscisic acid (D) auxin.

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XIV. Answer the following questions : 3x3=9

34. "In humans the sex of the child is determined by the father." Explain
this statement scientifrcally.

OR

A pea plant producing red flowers ( RR ) is crossed with a pea plant

producing white flowers ( rr ). Mention the type of plants that is
obtained in F, generation. Represent the results of F, generation

with the help of a checker board and write the ratio of the plants

obtained.

35. How is ozone layer formed ? What is the reason for the depletion of
this layer ? What is the effect of ozone layer depletion ?

36. What is placenta ? Mention its functions.

OR

What is fertilization ? Mention the changes that occur in the flowers

after fertilization.

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Lx4=4
X1/. Answer the following question
:

diagram showing the structure
of the human brain and

)

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11 83-E

)(V. Answer the following question : Lx4=4

3f'. Draw the diagram showing the structure of the human brain and

label the following parts :

Cerebrum

ii) Mid-brain.

XVI. Answer the following question : 1x5=5

38. Mention the events that occur during photosynthesis. How are the

photosynthetic products translocated in the piants ? Mention the

wastes generated during this process.

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