SRI ADICHUNCHANGIRI HIGH SCHOOL (ENGLISH MEDIUM) H.D. KOTE
SSLC SCHOOL LEVEL PREFPARATORY EXAMINIATION 2020-21
SUBJET-SCIENCE
TIME 2.45HOURS MARKS: 80
I. Four alternatives are given for each of the following questions /incomplete statement.
Choose the correct alternative and write the complete answer along with its letter of
alphabet. 8x1=8
1. The is unit of electric charges is
a) Volt b) Amphere c) Coulomb d) joule
2. The hydracarbgon that undergoes additi0on reaction among the following is
a) C2
H6 b) C3
H8 c) CH4 d)C3
H6
3. In modern periodic table as we move from left right along the period the atomic
size of the elements
a) Increases b) Does not change
c)decrease d) first increases and then decreases
4. The practice of using used materials without changing their shape and form is
a) Reuse b) Recyclingc) Repurpose d) Reduce
5. The suitable focal length of the convex lens used as magnifying lens to read
Hallmark 916 written on ornaments is
a) 12cm b) 60cm c) 100cm d)120cm
6.The magnetic field lines inside a solenoid are in the form of parallel straight lines.
The reason for this is the magnetic field inside the solenoid is..
a) Very Highb) Uniform c) Zero d) Produced by electricity
7. The gas liberated when an acid reacts with a metal is
a) Hydrogen b)Chlorine c)carbon dioxide d)nitrogen dioxide.
8. The correct statement with respect to biodegradable substances among the
following: these Substances
a) Remain inert in the environment for a long time
b) Harm various organisms in the ecosystem.
c)Increase the densitiy of Harmful chemicals in different trophic level
d) undergo Recycling naturally in the environment
II. Answer the following questions 8x1=8
9. How is ozone layer formed in the atmosphere ?
10. Mention any two problems caused by the Construction of huge dams?
11. If the radius of curvature of a lens is 30cm then what is its focal length?
12. State modern periodic law?
13. Forests area called biodiversity hotspots why?
14. Is it possible to test the Hardness of water using detergents ?
Give reason for your answer?
15.In the experiment of refraction through a glass slab the angle of incidence Should
be less than 900
why?
Answers
Answered by
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Explanation:
shreyas manu why are you using apps to find answers..we are giving for developing your knowledge..but y r u doing this so..
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