TBSE Class 10 Model Question Paper 2021 Science

Class - X: Science (Biology) : 30 Marks : 2020-2021
!Ó˲yàÈüÈܲ ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ ÙylÈüÈ1 1x8=8

1ä fl∫ˆÏ˲yç# ˛õ%!T˛Ó˚ çlƒ ≤ÈÏÎ˚yçl#Î˚ í˛z˛õܲÓ˚î •° û
ܲä ܲyÓ≈l í˛y•z x:y•zí˛ G ç° åáä ˆÜœ˛yˆÏÓ˚y!Ê˛° åàä §)Î≈yˆÏ°yܲ åâä í˛z˛õˆÏÓ˚Ó˚ §Óà%!°–
2ä Ó,E˛ ò%!ê˛ ÙylÓˆÏòˆÏ• ˆÎ ï˛ˆÏsfÓ˚ xÇ¢ Ó˚ã˛ly ܲˆÏÓ˚ ˆ§!ê˛ •° û
Ü˛ä ˛õ%!T˛ åáä Ÿª§l åàä ˆÓ˚ã˛l åâä §ÇÓ•l
3ä !lˆÏã˛Ó˚ ˆÜ˛yl‰ §Ù#ܲÓ˚î!ê˛ §yˆÏ°yܲ§ÇˆÏŸ’ˆÏ£ÏÓ˚ çlƒ ≤ÈÏÎyçƒ û
ܲä 6CO2+12H2O........... C6H12O6+6CO2+H2O
áä 6CO2+12H2O §)Î≈yˆÏ°yܲ .......... C6H12O6+O2+6H2O
àä 6CO2+12H2O ˆÜœ˛yˆÏÓ˚y!Ê˛°  §)Î≈yˆÏ°yܲ........... C6H12O6+6O2+6H2O
âä 6CO2+12H2O ˆÜœ˛yˆÏÓ˚y!Ê˛°  §)Î≈yˆÏ°yÜ ........... C6H12O6+6CO2+6H2O
4ä ~ܲ!ê˛ áyòƒ ¢,CˆÏ°Ó˚ ≤ÃÌÙ ˛õ%!T˛hflψÏÓ˚ xÇ¢@˝Ã•î ܲˆÏÓ˚ û
Ü˛ä ˛ï,˛îˆÏ˲yç# åáä ÙyÇ¢y§# åàä §Ó%ç í˛z!qò åâä !ÓˆÏÎ˚yçܲ
5ä ˛ GˆÏçylhflψÏÓ˚Ó˚ xÓ«˛ˆÏÎ˚Ó˚ çlƒ ≤Ãôylï˛ òyÎ˚# Ó˚y§yÎ˚!lܲ Ó›!ê˛ !ܲ ⁄
6ä ˜çÓ «˛!Î˚£÷Ï$ ~ܲ!ê˛ Óç≈ƒ ˛õòyˆÏÌ≈Ó˚ í˛zòy•Ó˚î òyG–
7ä ÓÇ¢à!ï˛ Óy §%≤Ãçll !ÓòƒyÓ˚ çlܲ ܲyˆÏܲ Ó°y •Î˚–
8ä §ç#Ó ˆÜ˛yˆÏ£ÏÓ˚ ≤Ãôyl Ÿª§l Ó›!ê˛Ó˚ lyÙ Ü˛Ó˚–
áÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 3x4=12
9ä !ܲ˲yˆÏÓ !çl ÙylÓˆÏòˆÏ• !¢¢%Ó˚ !°Aà !lô≈yÓ˚ˆÏî §y•y΃ ܲˆÏÓ˚–
10ä §Óyï˛ G xÓyï˛ Ÿª§ˆÏlÓ˚ !ï˛l!ê˛ ≤Ãôyl ˛õyÌ≈ܲƒ !°á–
11ä GˆÏçyl !ܲ⁄ !ܲ˲yˆÏÓ ~!ê˛ à!ë˛ï˛ •Î˚⁄ ~!ê˛ §ÇÓ˚«˛î xyÓ¢ƒÜ˛ ˆÜ˛l⁄
12ä xˆÏÎÔl çlˆÏlÓ˚ ~ܲܲ ˆÜ˛yl‰!ê˛ ⁄ xˆÏÎÔl G ˆÎÔl çlˆÏlÓ˚ ≤Ãôyl ò%!ê˛ ˛õyÌ≈ܲƒ !°á– 1+2
xÌÓy
xAàç çll ܲyˆÏܲ ӈϰ⁄ xAàç çlˆÏlÓ˚ ò%!ê˛ §%!Óôy !°á⁄ 1+2
àÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 5 5x2=10
13ä ÙylÓ •,Í!˛õˆÏu˛Ó˚ xhs˝à≈ë˛ˆÏlÓ˚ xÇ¢ !ã˛!•´ï˛ !ã˛eyAܲl ܲÓ˚⁄ •z•yÓ˚ Ùôƒ!òÎ˚y !ܲ˲yˆÏÓ Ó˚=˛ §ÇÓy!•ï˛ •Î˚ xyˆÏ°yã˛ly ܲÓ˚⁄
3 å!ã˛e 2+1ä +2 xÇ¢!lˆÏò≈¢ 1
xÌÓy
Ü˛ä ˆlÊ˛ˆÏlÓ˚ ˛õ!Ó˚FSÈߨ !ã˛e xAܲl ܲˆÏÓ˚ xÇ¢ !lˆÏò≈¢ ܲÓ˚– 3
áä í˛z!qòˆÏòˆÏ• ˆÓ˚ã˛l ˛õòyÌ≈ ï˛ƒyˆÏàÓ˚ ˆÎ ˆÜ˛ylG ò%!ê˛ ˛õÂô!ï˛ !°á– 2
14ä ˛õ%îÓ˚%Ͳõyòl !ܲ⁄ í˛zòy•Ó˚î òyG– xlyܲy!Cï˛ àË≈˛yÓfiÌy ~í˛¸yˆÏlyÓ˚ !ï˛l!ê˛ ≤Ãôyl í˛z˛õyÎ˚ !°á– 1+1+3=5
xÌÓy
ܲä ≤’yˆÏ§rê˛y Óy xÙÓ˚y !ܲ ⁄ xÙÓ˚yÓ˚ ˆÎˆÏܲyl ò%!ê˛ Ü˛yç !°á⁄
áä ˛ õ%Ó˚%ˆÏ£ÏÓ˚ ˆòˆÏ• ˆ§!Ùly° ˆË˛!§Ü˛° ~ÓÇ ≤ÈÏfiê˛ê˛@˝Ã!rÌÓ˚ Ë)˛!Ùܲy !°á⁄ 1+2+2=5

Class - X : Science (Biology) : 30 Marks : 2020-2021

Section-A: Each Questions Carries 1 Marks 1x8= 8

1. The antotrophic mode of nutrition requires –
a) Carbon dioxide and Water (b) Chlorophyll (c) Sunlight (d) All of the above.
2. The kidneys in human being are a part of the system for –
a) Nutrition (b) Respiration (c) Excretion (d) Circulation
3. Which of the following equation is appropriate for photosynthesis –
(a) 6CO2+12H2O........... C6H12O6+6CO2+H2O
(b) 6CO2+12H2O + sunlight .......... C6H12O6+O2+6H2O
(c) 6CO2+12H2O + Chlorophyll + Sunligh........... C6H12O6+6CO2+6H2O
(d) 6CO2+12H2O + Chlorophyll + Sunligh ........... C6H12O6+6CO2+6H2O
4. The first trophic level of a food chain is occupied by –
a) Herbivores (b) Carnivores (c) Green Plants (d) Decomposers
5. Name of the chemical substance which is mainly responsible for Ozone layer depletion.
6. Give example of one Biodegradable Waste ?
7. Who is considered as the father of Genetics ?
8. Give the name of chief respiratory substrate of living cell ?
Section - B Each Questions of Marks-3 3x4=12
9. How is the sex of the child determined genetically in human beings ?
10. Write 3(three) major difference between acrobic and anaerobic respiration?
11. What is Ozone ? How is it formed ? Why is it necessary to conserve it ?
12. What is the unit of asexual reproduction ? Mention 2(two) major differences between asexual
and sexual reproduction ? (1+2)
OR
What is vegetatine propagation ? Write any two advantages of vegetatine propagation ? 1+2
Section - C Each Questions Carries 5 Marks 5x2=10
13. Draw a laballed diagram of the internal structure of human heart ? Discuss the flow of circulation
through it ? 3 (Fig.2+lab1)+2
OR
a) Draw a neat laballed diagram of a nephran ?
b) Mention any two methods by which plants excrete their waste products? 3+2
14. Define regeneration ? Give example ? Write 3(three) major contraceptives used to prevent
unwanted pregnancy? 1+1+3
OR
a) What is placenta ? Mention any 2(two) functions of it.
(b) Write the role of Seminal Vesicle and prostrate gland present in human male? 1+2+2

Class - X : Science (Chemistry) : 25 Marks : 2020-2021
!Ó˲yàÈüÈܲ ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ ÙylÈüÈ1 1 x 6= 6

~ܲ!ê˛ ¢ˆÏ∑ Óy ~ܲ!ê˛ ÓyˆÏܲƒ !lˆÏ¡¨Ó˚ ≤ß¿à%!°Ó˚ í˛z_Ó˚ òyG /
1ä ˆ°y•y !l!Ù≈ï˛ !ç!l§ ˛õˆÏeÓ˚ í˛z˛õÓ˚ ˆÜ˛l Ó˚. ˆòGÎ˚y •Î˚⁄
2ä !lˆÏ¡¨Ó˚ §Ù#ܲÓ˚î!ê˛ §¡õ)î≈ ܲÓ˚ û
BaCl2 + H2SO4 → BaSO4 + ............
3ä !Ó¢%Âô ܲ˛õyÓ˚ §y°ˆÏÊ˛ê˛ oÓˆÏîÓ˚ Óî≈ !ܲÓ˚)˛õ ⁄
4ä ˆ°Ó%ˆÏï˛ í˛z˛õ!fiÌï˛ xƒy!§í˛!ê˛Ó˚ lyÙ !°á–
5ä ˛ ÙƒyàˆÏl!§Î˚yÙ ò•ˆÏlÓ˚ Ê˛ˆÏ° í˛zͲõߨ ˛õòyÌ≈!ê˛ !ܲ xy!¡‘ܲ ly «˛yÓ˚#Î˚⁄
6ä ~ܲ!ê˛ ï˛Ó˚° xôyï%˛Ó˚ lyÙ !°á–
áÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 3 3x3=9
!lˆÏ¡¨Ó˚ ≤ß¿à%!°Ó˚ §Ç!«˛Æ í˛z_Ó˚ !°á /
7ä åܲä ~ܲ!ê˛ !lˆÏò≈¢ˆÏܲÓ˚ lyÙ !°á–
åáä ≤âÙl !Ó!ܲÎ˚y ܲ#⁄
åàä xˆÏ¡‘Ó˚ ç°#Î˚ oÓî ï˛!í˛¸Í ˛õ!Ó˚Ó•l ܲˆÏÓ˚ ˆÜ˛l⁄ 1+1+1
8ä åÜ˛ä §!ܲÎ˚ï˛y ˆ◊!î !ܲ ⁄
åáä !lˆÏ¡¨Ó˚ !Ó!ܲÎ˚y!ê˛ §Çà!ë˛ï˛ •ˆÏÓ !ܲ ⁄ ܲyÓ˚ !°á–
Cu + FeSO4 → CuSO4 + Fe 1+2
9ä åÜ˛ä §Çl!Ùï˛ ≤ÃyÜ,˛!ï˛Ü˛ àƒyˆÏ§Ó˚ (CNG) ≤Ãôyl í˛z˛õyòyl ˆÜ˛yl!ê˛ ⁄
åáä x§Ç˛õ,=˛ (Unsaturated) •y•zˆÏí»˛yܲyÓ≈l ܲyˆÏܲ ӈϰ⁄ í˛zòy•Ó˚ !°á– 1+2
àÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 5 5x2=10
!lˆÏ¡¨Ó˚ ≤ß¿à%!°Ó˚ í˛z_Ó˚ òyG /
10ä åܲä ܲƒy!ê˛ˆÏl¢l ܲyˆÏܲ ӈϰ⁄
åáä §Ùàî#Î˚ ˆÏ◊!î ܲyˆÏܲ ӈϰ ⁄ í˛zòy•Ó˚î òyG–
åàä IUPAC ˛õÂô!ï˛ˆÏï˛ !lˆÏ¡¨Ó˚ ˆÎÔà!ê˛Ó˚ lyÙ !°á–

H O
H–C–C
OH
H

åâä ˆ˛õrê˛ylƒy° ~Ó˚ àë˛lÙ)°Ü˛ §ÇˆÏÜ˛ï˛ !°á– 1+2+1+1
11ä åÜ˛ä ˆÙˆÏu˛!°ˆÏÎ˚ˆÏ˲Ó˚ ˛õÎ≈yÎ˚ §yÓ˚î#Ó˚ ~ܲ!ê˛ §#ÙyÓÂôï˛y í˛zˆÏÕ‘á ܲÓ˚–
åáä xyô%!lܲ ˛õÎ≈yÎ˚ §yÓ˚!îˆÏï˛ ~ܲ!ê˛ ÚˆÏ◊!îÛ ~ÓÇ Ü˛Î˚!ê˛ ˛õÎ≈yÎ˚ xyˆÏSÈ⁄
åàä ˆÜœ˛y!Ó˚î ˛õÓ˚Ùyî%Ó˚ •zˆÏ°Ü˛ê˛∆l !Ólƒy§ !°á–
åâä ly•zˆÏê˛∆yˆÏçl G Ê˛§Ê˛Ó˚yˆÏ§Ó˚ ˛õÓ˚Ùyî% ˛Ü˛ÙyAܲ ÎÌyܲˆÏÙ 7 ~ÓÇ 15ñ ~ˆÏòÓ˚ ÙˆÏôƒ ˆÜ˛yl!ê˛ x!ôܲ ï˛!í˛¸Í }îydܲ
•ˆÏÓ ~ÓÇ ˆÜ˛l⁄ 1+1+1+2

Class - X : Science (Chemistry) : 25 Marks : 2020-2021
Section-A: Each Question Carries 1 Marks 1x6= 6

Anser the following questions in one word or in one sentence :
1. Why the iron materials are coated with paint ?
2. Complete the reaction –
BaCl2 + H2SO4 → BaSO4 + ..........
3. What is the colour of pure copper sulphate solution ?
4. Name the acid that is present in lemon.
5. Is the substance obtained by combustion of magnessium acidic or basic ?
6. Name one liquid non-metallic element.
Section - B Each Question Carries 3 Marks 3x3=9
Give brief answer of the following questions :
7. (i) Name one indicator.
(ii) What is ‘Neutralization Reaction’ ?
(iii) Why the aqueous solution of acid can conduct electricity ? 1+1+1
8. (i) What is ‘Reactivity Series’ ?
(ii) Explain whether the following reaction can occur or not –
Cu + FeSO4 → CuSO4 + Fe 1+2
9. (i) What is the main constituent of CNG ?
(ii) What is unsaturated hydrocarbon ? Explain with example ? 1+2
Section - C Each Question Carries 5 Marks 5x2=10
Answer the following questions
10. (i) What is catenation ?
(ii) What is homologous series ? Give example.
(iii) Write IUPAC name of the following compound –

H O
H–C–C
OH
H

(iv) Write structural formula of pentanal . 1+2+1+1
11. (i) Mention one limitation of Mendeleev’s periodic table.
(ii) How many ‘Group’ and ‘Period’ are there in Modern Periodic table ?
(iii) Write the electronic structure of chlorine atom.
(iv) Atomic number of nitrogen and phosphorous are 7 and 15 respectively. Which one is more
electronegative and why ? 1+1+1+2

lÙ%ly ≤ß¿˛õe / ò¢Ù ˆ◊!î / !ÓK˛yl å˛õòyÌ≈ !Óòƒyä / 25 l¡∫Ó˚ / 2020-2021
ܲÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl ÈüÈ1 1x6
A) ~ܲ ¢ˆÏ∑ ‡ÓyˆÏܲƒ í˛z_Ó˚ òyG / 1x5
1ä ~ܲà%FSÈ §yòy xyˆÏ°y !≤ÃçˆÏÙÓ˚ Ùôƒ !òˆÏÎ˚ ˆàˆÏ° !Ó˲y!çï˛ •Î˚– ~•z âê˛ly!ê˛Ó˚ lyÙ !ܲ ⁄
2ä ˆ§•z ˆË˛Ôï˛ Ó˚y!¢!ê˛Ó˚ lyÙ ˆ°á ÎyÓ˚ ~ܲܲ ˆË˛yŒê˛‡xƒy!¡õÎ˚yÓ˚–
3ä ˆÜ˛yl!ê˛Ó˚ ˆÓ˚yô ˆÓ!¢ ÈüÈ i) 220V - 100W ÓyÕ∫ xÌÓy (ii) 220V-60W ÓyÕ∫ ~ÓÇ ˆÜ˛l⁄
4ä l#ˆÏã˛Ó˚ !ã˛ˆÏe ò%!ê˛ òu˛ã%˛¡∫ܲˆÏܲ ˛õy¢y˛õy!¢ Ó˚yáy xyˆÏSÈ– P ~ÓÇ Q ˆÙÓ˚%Ó˚ ÙˆÏôƒ Ó°ˆÏÓ˚áyÓ˚ !ã˛e xAܲl ܲÓ˚–
S N S N
P Q
5ä ˆÜ˛yl §)ˆÏeÓ˚ §y•yˆÏ΃ ï˛!í˛¸ÍÓy•# }ç% ï˛yˆÏÓ˚Ó˚ ã˛yÓ˚!òˆÏܲ ˆã˛Ô¡∫ܲˆÏ«˛ˆÏeÓ˚ x!˲Ù%á !lî≈Î˚ ܲÓ˚y ÎyÎ˚⁄
B) §!ë˛Ü˛ í˛z_Ó˚!ê˛ ÓySÈy•z ܲÓ˚ / 1x1
6ä ï˛!í˛¸Íã%˛¡∫ܲ#Î˚ xyˆÏÓ¢ •° ÈüÈ
ܲä ~ܲ!ê˛ Ó›ˆÏܲ xyÎ˚l#ï˛ Ü˛Ó˚yÓ˚ ≤Ã!ܲÎ˚y åáä ~ܲ!ê˛ Ü%˛u˛°#Ó˚ Ùôƒ !òˆÏÎ˚ ï˛!í˛¸Í≤ÃÓy!•ï˛ ܲˆÏÓ˚ ˆã˛Ô¡∫ܲ ˆ«˛e§,!T˛Ó˚ ≤Ã!ܲÎ˚y
åàä ~ܲ!ê˛ ã%˛¡∫ܲ G ~ܲ!ê˛ Ü%˛u˛°#Ó˚ xyˆÏ˛õ!«˛Ü˛ à!ï˛Ó˚ çlƒ Ü%˛u˛°#ˆÏï˛ í˛zͲõߨ xy!ÓT˛ ï˛!í˛¸Í≤ÃÓy• åâä ~ܲ!ê˛ •zˆÏ°Ü˛!ê˛∆ܲ
ˆÙyê˛ˆÏÓ˚Ó˚ Ü%˛u˛°#Ó˚ â)î≈l ≤Ã!ܲÎ˚y–
áÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl ÈüÈ2 2x3=6
7ä ˆÜ˛yl Ó›ˆÏܲ ~ܲ!ê˛ xÓï˛° ò˛õ≈ˆÏîÓ˚ §yÙˆÏl ˆÊ˛yܲy§ G ˆÙÓ˚%Ó˚ ÙˆÏôƒ Ó˚yáy •ˆÏ° í˛zͲõߨ ≤Ã!ï˛!Ó¡∫ àë˛ˆÏlÓ˚ Ó˚!Ÿ¬ !ã˛e xAܲl
ܲÓ˚– í˛zͲõߨ ≤Ã!ï˛!ӈϡ∫Ó˚ ≤ÃÜ,˛!ï˛ G xyܲyÓ˚ !ܲ •ˆÏÓ ⁄ 2+1
D xÌÓy
ˆÜ˛yl Ó›ˆÏܲ ~ܲ!ê˛ í˛z_° ˆ°ˆÏ™Ó˚ §¡ø%ˆÏá ˆÊ˛yܲy§ ˜òˆÏâ≈ƒÓ˚ !mà%î ò)Ó˚ˆÏc Ó˚yáy •ˆÏ° í˛zͲõߨ ≤Ã!ï˛!Ó¡∫ àë˛ˆÏlÓ˚ Ó˚!Ÿ¬ !ã˛e xAܲl
ܲÓ˚– í˛zͲõߨ ≤Ã!ï˛!ӈϡ∫Ó˚ ≤ÃÜ,˛!ï˛ §¡õˆÏÜ≈˛ ˆ°á– 2+1
8ä ÜÑ˛yˆÏã˛Ó˚ !≤ÃçˆÏÙÓ˚ ÙˆÏôƒ !òˆÏÎ˚ §yòy xyˆÏ°y ˆàˆÏ° Óî≈ ˛õ!ê˛ ˜ï˛!Ó˚ •Î˚ ˆÏܲl⁄ ~Ó˚ Ó˚!Ÿ¬ !ã˛e xAܲl ܲÓ˚– 2+1
D xÌÓy
xyܲyˆÏ¢Ó˚ ï˛yÓ˚yà%!° !Ùê˛!Ùê˛ Ü˛ˆÏÓ˚ !Üv @˝Ã•à%!° ܲˆÏÓ˚ ly ˆÜ˛l⁄ í˛z_ˆÏÓ˚Ó˚ §˛õˆÏ«˛ Óƒyáƒy òyG–
9ä í˛yl •yˆÏï˛Ó˚ Ó,ÂôyAà%¤˛ §)e!ê˛ ˆ°á– ~ܲ!ê˛ xl%Ë)˛!Ùܲ ï˛!í˛¸ÍÓy•#ˆÏï˛ ï˛!í˛¸Í≤ÃÓy• ˛õ)Ó≈ ˆÌˆÏܲ ˛õ!Ÿã˛Ù x!˲Ù%á#– ~Ó˚ !ë˛Ü˛ l#ˆÏã˛
ˆÜ˛yl !Ó®%ˆÏï˛ ˆã˛Ô¡∫ܲ ˆÉ&«˛ˆÏeÓ˚ x!˲Ù%á !ܲ •ˆÏÓ⁄ Óƒyáƒy ܲÓ˚–
D xÌÓy
òu˛ã%˛¡∫ˆÏܲÓ˚ Óy•zˆÏÓ˚ ˆã˛Ô¡∫ܲ Ó°ˆÏÓ˚áyÓ˚ x!˲Ù%á !ܲ •ˆÏÓ⁄ ò%!ê˛ ã%˛¡∫ܲ Ó°ˆÏÓ˚áy ˛õÓ˚flõÓ˚ˆÏܲ ˆSÈò ܲˆÏÓ˚ ly ˆÜ˛l⁄
àÈüÈ!Ó˲yà ≤Ã!ï˛!ê˛ ≤Èϟ¿Ó˚ Ùyl 5 5x2=10
10ä åܲä ~ܲ!ê˛ xyˆÏ°yܲ Ó˚!Ÿ¬ ÓyÎ˚% ˆÌˆÏܲ çˆÏ° !ï˛Î≈ܲ˲yˆÏÓ ≤ÈÏÓ¢ ܲˆÏÓ˚– xyˆÏ°yܲ Ó˚!Ÿ¬!ê˛ !ܲ x!˲°ˆÏ¡∫Ó˚ !òˆÏܲ ˆÓшÏܲ xy§ˆÏÓ
ly!ܲ x!˲°¡∫ ˆÌˆÏܲ ò)ˆÏÓ˚ §ˆÏÓ˚ ÎyˆÏÓ⁄ ~Ó˚ Ó˚!Ÿ¬!ã˛e xAܲl ܲÓ˚–
åáä ~ܲ!ê˛ ÙyôƒˆÏÙÓ˚ ˛õÓ˚Ù ≤Ã!ï˛§Ó˚yˆÏAܲÓ˚ §ÇK˛y òyG– ¢)lƒ ÙyôƒˆÏÙ xyˆÏ°yÓ˚ à!ï˛ˆÏÓà 3 x 108m/s •ˆÏ° 1.5 ˛õÓ˚Ù ≤Ã!ï˛§Ó˚yˆÏAܲÓ˚
ˆÜ˛yl ÙyôƒˆÏÙ xyˆÏ°yÓ˚ à!ï˛ˆÏÓà !lî≈Î˚ ܲÓ˚– 2+(1+2)

xÌÓy
Ü˛ä ˆ°ˆÏ™Ó˚ «˛Ùï˛yÓ˚ §ÇK˛y òyG– Ú~ܲ!ê˛ ˆ°ˆÏ™Ó˚ «˛Ùï˛y +2.0DÛ ÈüüüÈ ~•z !ÓÓ,!ï˛!ê˛ ˆÌˆÏܲ ï%˛!Ù !ܲ ˆÓyV˛⁄
áä ˆï˛yÙyˆÏܲ 15ˆ§!Ù G 25ˆ§!Ù ˆÊ˛yܲy§ ˜òâ≈ƒ!Ó!¢T˛ ò%!ê˛ í˛z_° ˆ°™ ˆòGÎ˚y •°– ˆÜ˛yl!ê˛Ó˚ «˛Ùï˛y x!ôܲ •ˆÏÓ⁄ Î%!=˛ òyG–
(1.5+15+2)
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xÌÓy
ܲä ï˛!í˛¸Í ≤ÃÓyˆÏ•Ó˚ çlƒ í˛zͲõߨ ï˛yˆÏ˛õÓ˚ Ó˚y!¢Ùy°y!ê˛ ˆ°á ~ÓÇ ç%ˆÏ°Ó˚ §)e!ê˛ !ÓÓ,ï˛ Ü˛Ó˚–
áä 400W «˛Ùï˛y§¡õߨ ~ܲ!ê˛ ˜Óò%ƒ!ï˛Ü˛ ˆÓ˚!Ê˛çyˆÏÓ˚ê˛Ó˚ ≤Ã!ï˛!òl 8 ârê˛y ܲˆÏÓ˚ ã˛ˆÏ°– ~•z ï˛!í˛¸Í Îsf!ê˛ 30!òl ã˛°ˆÏ° ˆÎ ï˛!í˛¸Í
¢!=˛ áÓ˚ã˛ •ˆÏÓ KWH 3.00 ê˛yܲy !•§yˆÏÓ ï˛yÓ˚ Ù)°ƒ Ü˛ï˛ !lî≈Î˚ ܲÓ˚– 2.5+2.5

D x!ï˛!Ó˚=˛ ≤ß¿yÓ°#

Model Question : Class X : Science (Physics) : 25 Marks : 2020-2021
Section-A Each Question Carries 1 Mark 1x6=6
i) Answer in a word/sentence 1x5
1. A beam of white light splits when it passes through a prism. Name this phenomenon.
2. Name of physical quantity whose unit is volt/ampere.
3. Which is having more resistance– (i) 220v–100w bulb or (ii) 220v–60w bulb and why ?
4. Two magnets are lying side by side as shown below. Draw magnetic field lines between poles P
and Q.
S N S N
P Q
5. Name the rule which determines the direction of magnetic field around a straight current carring
conductor.
ii) Choose the correct option : 1x1
6. The phenomenon of electromagnetic induction is – (i) the process of charging a body (ii) the
process of generating magnetic field due to current passing through a coil (iii) producing induced
current in a coil due to relative motion between a magnet and a coil (iv) the process of rotating a coil
of an electric motor.
Section-B Each Question Carries 3 Marks 3x3=9
7. Draw a ray diagram of the image formed when the object is placed in front of a concave mirror in
between the focus and the pole of the mirror. What will be the nature and size of the image formed?
2+1
* OR
Draw a ray diagram to show the formation of image by a convex lens when an object is placed at
2f of that lens in front of it. Write about the nature of the image. 2+1
8. Why specturm is formed when white light is passed through a glass prism ? Draw the ray diagram.
2+1
*OR
Why do the stars appear to twinkle but the planets do not ? Explain your answer .
9. State Right Hand Thumb Rule. A current through a horizontal power line flows in east to west
direction. What is the direction of magnetic field at a point directly below it ? Explain it.
* OR
What is the direction of the magnetic field lines outside the bar magnet ? Why two magnetic lines of
force don’t intersect each other ? 1+2
Section-C Each Question Carries 5 Marks 5x2=10
10)(i) A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the
normal or away from the normal ? Darw a ray diagram.
(ii) Define the term absolute refractive index of a medium. If the speed of light in vacuum is 3 x
108m/s, find the speed of light in a medium of absolute refractive index 1.5.
OR
i) Define the power of a lens. What do you mean by the statement- ‘the power of a lens is +2.0D3.

(ii) You are provided with two convex lenses of focal length 15cm and 25cm respectively. Which of
the two is of larger power ? Give reason.
11. (i) State Ohm’s law. Derive the definition of resistance from it.
(ii) How the resistance of a conductor depends on its length and corss-sectional area ?
OR
i) Write an expression for the heat produced by electric current and state Joule’s Law.
ii) An electric refrigerator of power 400 W is used for 8 hours per day. Find the cost of electric
energy consumed in 30 days at the rate of Rs. 3.00 per kWH.