Science Past Year Paper SA-1(Set -8) - 2016, Class 10, CBSE Class 10 Notes | EduRev

Past Year Papers For Class 10

Created by: Manju Sen

Class 10 : Science Past Year Paper SA-1(Set -8) - 2016, Class 10, CBSE Class 10 Notes | EduRev

 Page 1


 
 
 
 
YGAON62 
?????? ???
?–1 : 2016–17 
Summative Assessment – 1 : 2016-17 
??
?? / Science 
?
? – X / Class – X 
?????? ??? : 3 ??            ?????? ???:90 
Time Allowed : 3 hours              Maximum Marks : 90 
 
???? ???? 
1. ??  ? ?? ?? ?????, ???-? ?? ???-? ? ????? ??? ??? ???? ????? ????? ? ? ?? 
? ? ?? ????? ? ? 
2. ???  ?????? ? ? 
3. ???? ???-? ?? ???-? ? ? ??? ?? ? ? ?? ????-???? ????? ?????? 
4. ???-? ? ?  ??$? 1 ?? 3 ? ?  ??-?? ??? ? ? ? ? ??? ? ?? ?? ?! ???? 
?? ??" ? ?? 
5. ???-? ? ?  ??$? 4 ?? 6 ? ?  ??-?? ????? ? ? ? ? ??? ? ?? ???? 30-30 ?!?? 
? ?? 
6. ???-? ? ?  ??$? 7 ?? 18 ? ?  ???-??? ????? ? ? ? ? ??? ?? ???? 50-50 
?!?? ? ?? 
7. ??? ? ? ?  ??$? 19 ?? 24 ? ?  ????-???? ????? ? ? ?  | ??? ? ?? ???? 70-
70 ?!?? ? ? | 
8. ???-? ? ?  ??$? 25 ?? 33 ? ?  ????'? ???? ?? ???+?? ?-???.?  ? ? 
/??  ??-?? ??? ?? ??? ??? ??? ??? ???.?? ? ?? ???? ? ? ?? ?? ???? ????3 
???. ????? ??? 
9. ???-? ? ?  ??$? 34 ?? 36 ? ?  ????'? ???? ?? ???+?? ??-?? ????? ? ? ? ? 
 
General Instructions 
1. The question paper comprises of two Sections, A and B. You are to attempt both the sections. 
2. All questions are compulsory. 
3. All questions of Section-A and all questions of Section-B are to be attemped separately. 
4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in 
one word or in one sentence. 
5. Question numbers 4 to 6 in Section-A are two marks questions. These are to be answered in 
about 30 words each. 
6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered 
in about 50 words each. 
7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered 
in about 70 words each. 
8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical 
skills. Each question is a one mark question. You are to select one most appropriate response 
out of the four provided to you. 
Page 2


 
 
 
 
YGAON62 
?????? ???
?–1 : 2016–17 
Summative Assessment – 1 : 2016-17 
??
?? / Science 
?
? – X / Class – X 
?????? ??? : 3 ??            ?????? ???:90 
Time Allowed : 3 hours              Maximum Marks : 90 
 
???? ???? 
1. ??  ? ?? ?? ?????, ???-? ?? ???-? ? ????? ??? ??? ???? ????? ????? ? ? ?? 
? ? ?? ????? ? ? 
2. ???  ?????? ? ? 
3. ???? ???-? ?? ???-? ? ? ??? ?? ? ? ?? ????-???? ????? ?????? 
4. ???-? ? ?  ??$? 1 ?? 3 ? ?  ??-?? ??? ? ? ? ? ??? ? ?? ?? ?! ???? 
?? ??" ? ?? 
5. ???-? ? ?  ??$? 4 ?? 6 ? ?  ??-?? ????? ? ? ? ? ??? ? ?? ???? 30-30 ?!?? 
? ?? 
6. ???-? ? ?  ??$? 7 ?? 18 ? ?  ???-??? ????? ? ? ? ? ??? ?? ???? 50-50 
?!?? ? ?? 
7. ??? ? ? ?  ??$? 19 ?? 24 ? ?  ????-???? ????? ? ? ?  | ??? ? ?? ???? 70-
70 ?!?? ? ? | 
8. ???-? ? ?  ??$? 25 ?? 33 ? ?  ????'? ???? ?? ???+?? ?-???.?  ? ? 
/??  ??-?? ??? ?? ??? ??? ??? ??? ???.?? ? ?? ???? ? ? ?? ?? ???? ????3 
???. ????? ??? 
9. ???-? ? ?  ??$? 34 ?? 36 ? ?  ????'? ???? ?? ???+?? ??-?? ????? ? ? ? ? 
 
General Instructions 
1. The question paper comprises of two Sections, A and B. You are to attempt both the sections. 
2. All questions are compulsory. 
3. All questions of Section-A and all questions of Section-B are to be attemped separately. 
4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in 
one word or in one sentence. 
5. Question numbers 4 to 6 in Section-A are two marks questions. These are to be answered in 
about 30 words each. 
6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered 
in about 50 words each. 
7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered 
in about 70 words each. 
8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical 
skills. Each question is a one mark question. You are to select one most appropriate response 
out of the four provided to you. 
 
 
 
 
9. Question numbers 34 to 36 in Section-B are questions based on practical skills. Each question 
is of two marks. 
 
??? – ? / Section – A 
 
1. ??? ?? ??4???? 6? ???? ??? 
What is emulsification of fat? 
 
2. 7?? ?? ???:???? ??;??? ??<?? | 
State the principle on which a fuse works. 
 
3. ??? ? ? ?? ? ? ?=+?? ??? ?? ???? ???? ?? ?>?? ??<?? | 
Mentions the purpose of blackening the interior of a solar cooker. 
 
4. @??-A?? ?B?? 6? ??? ???? ?? ?? ???C ? ? ??? ?? ?B?? ? ???? ???? ????B?? 
?? ??????? ???????? ?????? ??<?? | 
What is chlor-alkali process? Write a balanced chemical equation of the reaction involved 
in this process to justify your answer. 
 
5. /?? ?? ??-?? ?????? ????? : 
(i) ??E ?????? ?? ?? ???? ?? ?F ?????? ?? ?? ????? 
(ii) ??? ? ??? ?? ? ? ???? ?? ???? ?? ??? ? ??? ?? ?????? ?? ????? 
Write one example each of: 
(i) a metal having low melting point and non-metal having high melting point. 
(ii) a metal which is poor conductor of electricity and a non-metal which is good conductor 
electricity. 
 
6. ?<I? ????????:? ?? ??? ??? ????? ??? 
How does auxin promote phototropism? 
 
7. (a) ???????? ?????? ??<???: 
(i) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ????? ???? ???? ?? | 
(ii) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ?????? ? ????? ???? 
???? ??| 
(b) ? ? <4?? ???L??? ? ? ?? ????M ?? ? ??? N??? ?? ???? ?????? | 
(a) Write chemical equations: 
(i) when carbon dioxide gas is passed through lime water 
(ii) when excess of carbon dioxide gas is passed through lime water 
(b) List two different natural forms of calcium carbonate 
 
8. ??? ???? ?? ?? ????? ????? ????? ?? | ???? ????? ?? ? ? ? ?????? ???? ????? 
??? ??? ?? ??? ?? ? ???? ? ???? | ???? ???? ?? ?? ???? ??: ???? ?? ??: ?? 
Page 3


 
 
 
 
YGAON62 
?????? ???
?–1 : 2016–17 
Summative Assessment – 1 : 2016-17 
??
?? / Science 
?
? – X / Class – X 
?????? ??? : 3 ??            ?????? ???:90 
Time Allowed : 3 hours              Maximum Marks : 90 
 
???? ???? 
1. ??  ? ?? ?? ?????, ???-? ?? ???-? ? ????? ??? ??? ???? ????? ????? ? ? ?? 
? ? ?? ????? ? ? 
2. ???  ?????? ? ? 
3. ???? ???-? ?? ???-? ? ? ??? ?? ? ? ?? ????-???? ????? ?????? 
4. ???-? ? ?  ??$? 1 ?? 3 ? ?  ??-?? ??? ? ? ? ? ??? ? ?? ?? ?! ???? 
?? ??" ? ?? 
5. ???-? ? ?  ??$? 4 ?? 6 ? ?  ??-?? ????? ? ? ? ? ??? ? ?? ???? 30-30 ?!?? 
? ?? 
6. ???-? ? ?  ??$? 7 ?? 18 ? ?  ???-??? ????? ? ? ? ? ??? ?? ???? 50-50 
?!?? ? ?? 
7. ??? ? ? ?  ??$? 19 ?? 24 ? ?  ????-???? ????? ? ? ?  | ??? ? ?? ???? 70-
70 ?!?? ? ? | 
8. ???-? ? ?  ??$? 25 ?? 33 ? ?  ????'? ???? ?? ???+?? ?-???.?  ? ? 
/??  ??-?? ??? ?? ??? ??? ??? ??? ???.?? ? ?? ???? ? ? ?? ?? ???? ????3 
???. ????? ??? 
9. ???-? ? ?  ??$? 34 ?? 36 ? ?  ????'? ???? ?? ???+?? ??-?? ????? ? ? ? ? 
 
General Instructions 
1. The question paper comprises of two Sections, A and B. You are to attempt both the sections. 
2. All questions are compulsory. 
3. All questions of Section-A and all questions of Section-B are to be attemped separately. 
4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in 
one word or in one sentence. 
5. Question numbers 4 to 6 in Section-A are two marks questions. These are to be answered in 
about 30 words each. 
6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered 
in about 50 words each. 
7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered 
in about 70 words each. 
8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical 
skills. Each question is a one mark question. You are to select one most appropriate response 
out of the four provided to you. 
 
 
 
 
9. Question numbers 34 to 36 in Section-B are questions based on practical skills. Each question 
is of two marks. 
 
??? – ? / Section – A 
 
1. ??? ?? ??4???? 6? ???? ??? 
What is emulsification of fat? 
 
2. 7?? ?? ???:???? ??;??? ??<?? | 
State the principle on which a fuse works. 
 
3. ??? ? ? ?? ? ? ?=+?? ??? ?? ???? ???? ?? ?>?? ??<?? | 
Mentions the purpose of blackening the interior of a solar cooker. 
 
4. @??-A?? ?B?? 6? ??? ???? ?? ?? ???C ? ? ??? ?? ?B?? ? ???? ???? ????B?? 
?? ??????? ???????? ?????? ??<?? | 
What is chlor-alkali process? Write a balanced chemical equation of the reaction involved 
in this process to justify your answer. 
 
5. /?? ?? ??-?? ?????? ????? : 
(i) ??E ?????? ?? ?? ???? ?? ?F ?????? ?? ?? ????? 
(ii) ??? ? ??? ?? ? ? ???? ?? ???? ?? ??? ? ??? ?? ?????? ?? ????? 
Write one example each of: 
(i) a metal having low melting point and non-metal having high melting point. 
(ii) a metal which is poor conductor of electricity and a non-metal which is good conductor 
electricity. 
 
6. ?<I? ????????:? ?? ??? ??? ????? ??? 
How does auxin promote phototropism? 
 
7. (a) ???????? ?????? ??<???: 
(i) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ????? ???? ???? ?? | 
(ii) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ?????? ? ????? ???? 
???? ??| 
(b) ? ? <4?? ???L??? ? ? ?? ????M ?? ? ??? N??? ?? ???? ?????? | 
(a) Write chemical equations: 
(i) when carbon dioxide gas is passed through lime water 
(ii) when excess of carbon dioxide gas is passed through lime water 
(b) List two different natural forms of calcium carbonate 
 
8. ??? ???? ?? ?? ????? ????? ????? ?? | ???? ????? ?? ? ? ? ?????? ???? ????? 
??? ??? ?? ??? ?? ? ???? ? ???? | ???? ???? ?? ?? ???? ??: ???? ?? ??: ?? 
 
 
 
 
??? ?? | ??? ? ?A? ?? ???? ?????? ???? ????? ??? ????:? ?T?? ?? ??? 
??<??? | 6? ???? ?? ?? ??? ??????? ?? ????? ???? ??? 
Rama wanted her house to be white washed. She bought some quicklime from the market 
and dissolved. It in water in a big tub. She noticed that the container became hot without 
any heating. Give reason for her observation with equation and name the product formed. 
What happed when it is applied on the walls? 
 
9. ??????? 6? ??? ??????? ?? ???? ?? ??U?:? ??? ??? ???? ???? ??? ??A?? ? 
???????| 
What is cinnabar? How is a metal extracted from cinnabar? Explain briefly. 
 
10. ???? ??????? A, B, C, D ??? E ?? ?? ???:?? ???? ?? ???? ?? ???? ?? ?? pH ? ? ??? 
B??? 4, 7, 1, 11 ??? 9 ?Y ???? ?  | ????? ????? ??: 
(i) ?????? 
(ii) ?? ?Z?? 
(iii) ?? A???? 
(iv) ???:? A???? 
(v) ???:? ?Z?? 
pH ? ? ????? ?? ???? [ ??? ??? ?? ???\?? ? ? ????? B? ? ]?<^?? ????? | 
Five solutions A, B, C, D and E showed pH as 4, 7, 1, 11 and 9 respectively when tested by 
universal indicator. Which solution is: 
(i) Neutral 
(ii) Stronger acidic 
(iii) Strongly alkaline 
(iv) Weakly alkaline 
(v) Weakly acidic 
Arrange the pH in increasing order of H
+
 concentration. 
 
11. (a) ?=??? ? ???????? ??`?? ??? ??? ???? ?? | 
(b) ?????? ??3 ??? ??? ???? ?? ???? 6?? ?? ???? ??? 
(a) How does chemical coordination take place in animals? 
(b) It is advised to use iodised salt, Give reason. 
 
12. ?? ? ??<^?? ?? ???? [ ???? ????C ?? ??? ??<??? | ??a ?? ??? ??b??? ???? 
??? ?? ??? ?? ???? ?? ??? ?? ????? ??? ??? ???? ??? 
Name one nitrogenous waste present in urine. What is the basic filtration unit of kidney 
called? How is the amount of urine produced regulated? 
 
13. ???? c?? ?d ?? ?? ?????? ?? ??? ??E ?? ??????? ?????: 
(i) ? ? ? 
(ii) f??? 
Page 4


 
 
 
 
YGAON62 
?????? ???
?–1 : 2016–17 
Summative Assessment – 1 : 2016-17 
??
?? / Science 
?
? – X / Class – X 
?????? ??? : 3 ??            ?????? ???:90 
Time Allowed : 3 hours              Maximum Marks : 90 
 
???? ???? 
1. ??  ? ?? ?? ?????, ???-? ?? ???-? ? ????? ??? ??? ???? ????? ????? ? ? ?? 
? ? ?? ????? ? ? 
2. ???  ?????? ? ? 
3. ???? ???-? ?? ???-? ? ? ??? ?? ? ? ?? ????-???? ????? ?????? 
4. ???-? ? ?  ??$? 1 ?? 3 ? ?  ??-?? ??? ? ? ? ? ??? ? ?? ?? ?! ???? 
?? ??" ? ?? 
5. ???-? ? ?  ??$? 4 ?? 6 ? ?  ??-?? ????? ? ? ? ? ??? ? ?? ???? 30-30 ?!?? 
? ?? 
6. ???-? ? ?  ??$? 7 ?? 18 ? ?  ???-??? ????? ? ? ? ? ??? ?? ???? 50-50 
?!?? ? ?? 
7. ??? ? ? ?  ??$? 19 ?? 24 ? ?  ????-???? ????? ? ? ?  | ??? ? ?? ???? 70-
70 ?!?? ? ? | 
8. ???-? ? ?  ??$? 25 ?? 33 ? ?  ????'? ???? ?? ???+?? ?-???.?  ? ? 
/??  ??-?? ??? ?? ??? ??? ??? ??? ???.?? ? ?? ???? ? ? ?? ?? ???? ????3 
???. ????? ??? 
9. ???-? ? ?  ??$? 34 ?? 36 ? ?  ????'? ???? ?? ???+?? ??-?? ????? ? ? ? ? 
 
General Instructions 
1. The question paper comprises of two Sections, A and B. You are to attempt both the sections. 
2. All questions are compulsory. 
3. All questions of Section-A and all questions of Section-B are to be attemped separately. 
4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in 
one word or in one sentence. 
5. Question numbers 4 to 6 in Section-A are two marks questions. These are to be answered in 
about 30 words each. 
6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered 
in about 50 words each. 
7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered 
in about 70 words each. 
8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical 
skills. Each question is a one mark question. You are to select one most appropriate response 
out of the four provided to you. 
 
 
 
 
9. Question numbers 34 to 36 in Section-B are questions based on practical skills. Each question 
is of two marks. 
 
??? – ? / Section – A 
 
1. ??? ?? ??4???? 6? ???? ??? 
What is emulsification of fat? 
 
2. 7?? ?? ???:???? ??;??? ??<?? | 
State the principle on which a fuse works. 
 
3. ??? ? ? ?? ? ? ?=+?? ??? ?? ???? ???? ?? ?>?? ??<?? | 
Mentions the purpose of blackening the interior of a solar cooker. 
 
4. @??-A?? ?B?? 6? ??? ???? ?? ?? ???C ? ? ??? ?? ?B?? ? ???? ???? ????B?? 
?? ??????? ???????? ?????? ??<?? | 
What is chlor-alkali process? Write a balanced chemical equation of the reaction involved 
in this process to justify your answer. 
 
5. /?? ?? ??-?? ?????? ????? : 
(i) ??E ?????? ?? ?? ???? ?? ?F ?????? ?? ?? ????? 
(ii) ??? ? ??? ?? ? ? ???? ?? ???? ?? ??? ? ??? ?? ?????? ?? ????? 
Write one example each of: 
(i) a metal having low melting point and non-metal having high melting point. 
(ii) a metal which is poor conductor of electricity and a non-metal which is good conductor 
electricity. 
 
6. ?<I? ????????:? ?? ??? ??? ????? ??? 
How does auxin promote phototropism? 
 
7. (a) ???????? ?????? ??<???: 
(i) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ????? ???? ???? ?? | 
(ii) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ?????? ? ????? ???? 
???? ??| 
(b) ? ? <4?? ???L??? ? ? ?? ????M ?? ? ??? N??? ?? ???? ?????? | 
(a) Write chemical equations: 
(i) when carbon dioxide gas is passed through lime water 
(ii) when excess of carbon dioxide gas is passed through lime water 
(b) List two different natural forms of calcium carbonate 
 
8. ??? ???? ?? ?? ????? ????? ????? ?? | ???? ????? ?? ? ? ? ?????? ???? ????? 
??? ??? ?? ??? ?? ? ???? ? ???? | ???? ???? ?? ?? ???? ??: ???? ?? ??: ?? 
 
 
 
 
??? ?? | ??? ? ?A? ?? ???? ?????? ???? ????? ??? ????:? ?T?? ?? ??? 
??<??? | 6? ???? ?? ?? ??? ??????? ?? ????? ???? ??? 
Rama wanted her house to be white washed. She bought some quicklime from the market 
and dissolved. It in water in a big tub. She noticed that the container became hot without 
any heating. Give reason for her observation with equation and name the product formed. 
What happed when it is applied on the walls? 
 
9. ??????? 6? ??? ??????? ?? ???? ?? ??U?:? ??? ??? ???? ???? ??? ??A?? ? 
???????| 
What is cinnabar? How is a metal extracted from cinnabar? Explain briefly. 
 
10. ???? ??????? A, B, C, D ??? E ?? ?? ???:?? ???? ?? ???? ?? ???? ?? ?? pH ? ? ??? 
B??? 4, 7, 1, 11 ??? 9 ?Y ???? ?  | ????? ????? ??: 
(i) ?????? 
(ii) ?? ?Z?? 
(iii) ?? A???? 
(iv) ???:? A???? 
(v) ???:? ?Z?? 
pH ? ? ????? ?? ???? [ ??? ??? ?? ???\?? ? ? ????? B? ? ]?<^?? ????? | 
Five solutions A, B, C, D and E showed pH as 4, 7, 1, 11 and 9 respectively when tested by 
universal indicator. Which solution is: 
(i) Neutral 
(ii) Stronger acidic 
(iii) Strongly alkaline 
(iv) Weakly alkaline 
(v) Weakly acidic 
Arrange the pH in increasing order of H
+
 concentration. 
 
11. (a) ?=??? ? ???????? ??`?? ??? ??? ???? ?? | 
(b) ?????? ??3 ??? ??? ???? ?? ???? 6?? ?? ???? ??? 
(a) How does chemical coordination take place in animals? 
(b) It is advised to use iodised salt, Give reason. 
 
12. ?? ? ??<^?? ?? ???? [ ???? ????C ?? ??? ??<??? | ??a ?? ??? ??b??? ???? 
??? ?? ??? ?? ???? ?? ??? ?? ????? ??? ??? ???? ??? 
Name one nitrogenous waste present in urine. What is the basic filtration unit of kidney 
called? How is the amount of urine produced regulated? 
 
13. ???? c?? ?d ?? ?? ?????? ?? ??? ??E ?? ??????? ?????: 
(i) ? ? ? 
(ii) f??? 
 
 
 
 
Draw a diagram of human respiratory system and label the following parts on it: 
(i) Larynx  
(ii) Trachea 
 
14. ???? ??? ????? ?g?? 1m ?? ?? ????? 25 ?? ?? | ??? ?? ??? ?? ?h? 
0.15mm ??, ?? ??? ? ????: ?? ???????? ?+????? ????? | 
Resistance of a metal wire of length 1 metre is 25 omhs. If the radius of the wire is 0.15 
mm, calculate the resistivity of the material. 
 
15. ?+??????? ?? 6? ??T?: ??? ??? ???????? ?+??????? ??? ??? ]???? ???? ??? 
???? ??? ????? ??<?? | 
What is meant by solenoid? How does a current carrying solenoid behave? Give its main 
use. 
 
16. ???? ??? ?? ??? ? ??? ?+??? ?? ?i?? ????? ?? 5O ? ? ?????? ? ? ????? ? ? ??? 
?????=? j?? ????? | 
 
Study the following electric circuit and calculate the potential difference across 5O 
resistor. 
 
 
17. ????k ?????? ? ? ???? ?? ?/??? ???? ? ? ?? ???? ?? | ?????? ?? ????k ???? 
?????? ? ????? ??? ???? ?  | 
(i) ?? ???N? ???+?? ?? ????? ??l?? ?? ??????? ?? ???? ????? ????? ?????? ? ? 
???? ???? ???? ???? ? ? ?? ?? ?? ???? ?? ???? ?? | 
(ii) ????k ?????? ?? ????? ?? ???? ? ? ?? ? ? ???+?3 ??? ?? ???????: ??? 
??<?? | 
Burning of fossil fuels cause lots of air pollution. Generally these fossil fuels are used in our 
vehicles. 
(i) As an aware citizen, list two ways to reduce air pollution caused to vehicles. 
(ii) Write two harmful effects other than air pollution, that are reduced due to burning of 
fossil fuels. 
 
Page 5


 
 
 
 
YGAON62 
?????? ???
?–1 : 2016–17 
Summative Assessment – 1 : 2016-17 
??
?? / Science 
?
? – X / Class – X 
?????? ??? : 3 ??            ?????? ???:90 
Time Allowed : 3 hours              Maximum Marks : 90 
 
???? ???? 
1. ??  ? ?? ?? ?????, ???-? ?? ???-? ? ????? ??? ??? ???? ????? ????? ? ? ?? 
? ? ?? ????? ? ? 
2. ???  ?????? ? ? 
3. ???? ???-? ?? ???-? ? ? ??? ?? ? ? ?? ????-???? ????? ?????? 
4. ???-? ? ?  ??$? 1 ?? 3 ? ?  ??-?? ??? ? ? ? ? ??? ? ?? ?? ?! ???? 
?? ??" ? ?? 
5. ???-? ? ?  ??$? 4 ?? 6 ? ?  ??-?? ????? ? ? ? ? ??? ? ?? ???? 30-30 ?!?? 
? ?? 
6. ???-? ? ?  ??$? 7 ?? 18 ? ?  ???-??? ????? ? ? ? ? ??? ?? ???? 50-50 
?!?? ? ?? 
7. ??? ? ? ?  ??$? 19 ?? 24 ? ?  ????-???? ????? ? ? ?  | ??? ? ?? ???? 70-
70 ?!?? ? ? | 
8. ???-? ? ?  ??$? 25 ?? 33 ? ?  ????'? ???? ?? ???+?? ?-???.?  ? ? 
/??  ??-?? ??? ?? ??? ??? ??? ??? ???.?? ? ?? ???? ? ? ?? ?? ???? ????3 
???. ????? ??? 
9. ???-? ? ?  ??$? 34 ?? 36 ? ?  ????'? ???? ?? ???+?? ??-?? ????? ? ? ? ? 
 
General Instructions 
1. The question paper comprises of two Sections, A and B. You are to attempt both the sections. 
2. All questions are compulsory. 
3. All questions of Section-A and all questions of Section-B are to be attemped separately. 
4. Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in 
one word or in one sentence. 
5. Question numbers 4 to 6 in Section-A are two marks questions. These are to be answered in 
about 30 words each. 
6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered 
in about 50 words each. 
7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered 
in about 70 words each. 
8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical 
skills. Each question is a one mark question. You are to select one most appropriate response 
out of the four provided to you. 
 
 
 
 
9. Question numbers 34 to 36 in Section-B are questions based on practical skills. Each question 
is of two marks. 
 
??? – ? / Section – A 
 
1. ??? ?? ??4???? 6? ???? ??? 
What is emulsification of fat? 
 
2. 7?? ?? ???:???? ??;??? ??<?? | 
State the principle on which a fuse works. 
 
3. ??? ? ? ?? ? ? ?=+?? ??? ?? ???? ???? ?? ?>?? ??<?? | 
Mentions the purpose of blackening the interior of a solar cooker. 
 
4. @??-A?? ?B?? 6? ??? ???? ?? ?? ???C ? ? ??? ?? ?B?? ? ???? ???? ????B?? 
?? ??????? ???????? ?????? ??<?? | 
What is chlor-alkali process? Write a balanced chemical equation of the reaction involved 
in this process to justify your answer. 
 
5. /?? ?? ??-?? ?????? ????? : 
(i) ??E ?????? ?? ?? ???? ?? ?F ?????? ?? ?? ????? 
(ii) ??? ? ??? ?? ? ? ???? ?? ???? ?? ??? ? ??? ?? ?????? ?? ????? 
Write one example each of: 
(i) a metal having low melting point and non-metal having high melting point. 
(ii) a metal which is poor conductor of electricity and a non-metal which is good conductor 
electricity. 
 
6. ?<I? ????????:? ?? ??? ??? ????? ??? 
How does auxin promote phototropism? 
 
7. (a) ???????? ?????? ??<???: 
(i) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ????? ???? ???? ?? | 
(ii) ?? ???:? ????I??? ??? ?? ???? ? ? ???? ? ?????? ? ????? ???? 
???? ??| 
(b) ? ? <4?? ???L??? ? ? ?? ????M ?? ? ??? N??? ?? ???? ?????? | 
(a) Write chemical equations: 
(i) when carbon dioxide gas is passed through lime water 
(ii) when excess of carbon dioxide gas is passed through lime water 
(b) List two different natural forms of calcium carbonate 
 
8. ??? ???? ?? ?? ????? ????? ????? ?? | ???? ????? ?? ? ? ? ?????? ???? ????? 
??? ??? ?? ??? ?? ? ???? ? ???? | ???? ???? ?? ?? ???? ??: ???? ?? ??: ?? 
 
 
 
 
??? ?? | ??? ? ?A? ?? ???? ?????? ???? ????? ??? ????:? ?T?? ?? ??? 
??<??? | 6? ???? ?? ?? ??? ??????? ?? ????? ???? ??? 
Rama wanted her house to be white washed. She bought some quicklime from the market 
and dissolved. It in water in a big tub. She noticed that the container became hot without 
any heating. Give reason for her observation with equation and name the product formed. 
What happed when it is applied on the walls? 
 
9. ??????? 6? ??? ??????? ?? ???? ?? ??U?:? ??? ??? ???? ???? ??? ??A?? ? 
???????| 
What is cinnabar? How is a metal extracted from cinnabar? Explain briefly. 
 
10. ???? ??????? A, B, C, D ??? E ?? ?? ???:?? ???? ?? ???? ?? ???? ?? ?? pH ? ? ??? 
B??? 4, 7, 1, 11 ??? 9 ?Y ???? ?  | ????? ????? ??: 
(i) ?????? 
(ii) ?? ?Z?? 
(iii) ?? A???? 
(iv) ???:? A???? 
(v) ???:? ?Z?? 
pH ? ? ????? ?? ???? [ ??? ??? ?? ???\?? ? ? ????? B? ? ]?<^?? ????? | 
Five solutions A, B, C, D and E showed pH as 4, 7, 1, 11 and 9 respectively when tested by 
universal indicator. Which solution is: 
(i) Neutral 
(ii) Stronger acidic 
(iii) Strongly alkaline 
(iv) Weakly alkaline 
(v) Weakly acidic 
Arrange the pH in increasing order of H
+
 concentration. 
 
11. (a) ?=??? ? ???????? ??`?? ??? ??? ???? ?? | 
(b) ?????? ??3 ??? ??? ???? ?? ???? 6?? ?? ???? ??? 
(a) How does chemical coordination take place in animals? 
(b) It is advised to use iodised salt, Give reason. 
 
12. ?? ? ??<^?? ?? ???? [ ???? ????C ?? ??? ??<??? | ??a ?? ??? ??b??? ???? 
??? ?? ??? ?? ???? ?? ??? ?? ????? ??? ??? ???? ??? 
Name one nitrogenous waste present in urine. What is the basic filtration unit of kidney 
called? How is the amount of urine produced regulated? 
 
13. ???? c?? ?d ?? ?? ?????? ?? ??? ??E ?? ??????? ?????: 
(i) ? ? ? 
(ii) f??? 
 
 
 
 
Draw a diagram of human respiratory system and label the following parts on it: 
(i) Larynx  
(ii) Trachea 
 
14. ???? ??? ????? ?g?? 1m ?? ?? ????? 25 ?? ?? | ??? ?? ??? ?? ?h? 
0.15mm ??, ?? ??? ? ????: ?? ???????? ?+????? ????? | 
Resistance of a metal wire of length 1 metre is 25 omhs. If the radius of the wire is 0.15 
mm, calculate the resistivity of the material. 
 
15. ?+??????? ?? 6? ??T?: ??? ??? ???????? ?+??????? ??? ??? ]???? ???? ??? 
???? ??? ????? ??<?? | 
What is meant by solenoid? How does a current carrying solenoid behave? Give its main 
use. 
 
16. ???? ??? ?? ??? ? ??? ?+??? ?? ?i?? ????? ?? 5O ? ? ?????? ? ? ????? ? ? ??? 
?????=? j?? ????? | 
 
Study the following electric circuit and calculate the potential difference across 5O 
resistor. 
 
 
17. ????k ?????? ? ? ???? ?? ?/??? ???? ? ? ?? ???? ?? | ?????? ?? ????k ???? 
?????? ? ????? ??? ???? ?  | 
(i) ?? ???N? ???+?? ?? ????? ??l?? ?? ??????? ?? ???? ????? ????? ?????? ? ? 
???? ???? ???? ???? ? ? ?? ?? ?? ???? ?? ???? ?? | 
(ii) ????k ?????? ?? ????? ?? ???? ? ? ?? ? ? ???+?3 ??? ?? ???????: ??? 
??<?? | 
Burning of fossil fuels cause lots of air pollution. Generally these fossil fuels are used in our 
vehicles. 
(i) As an aware citizen, list two ways to reduce air pollution caused to vehicles. 
(ii) Write two harmful effects other than air pollution, that are reduced due to burning of 
fossil fuels. 
 
 
 
 
 
18. m?<@?? ????C?? ?? ??????? ??? ??? ? ??<n? +???? ?? ??????? ???:Y ???A? ?????? 
?? ???? ? ?????? ???: ?? ??? ???? ? ? ??? ??? ??<?? | 
List any three advantages of harnessing nuclear energy provided sufficient safety measure 
are taken for disposal of the residual waste and against accidental leakage. 
 
19. ??? ? ??????? ?? ?+????? ??<?? | ??? ? ??????? ?? ????? ? ? ???? ??? ??? ? ? ????p 
?? ??? ???? ??? ??? ? ??????? ?? ????? ? ? ??? ??l?? ??? ??????? ?? ]?$? ?????? 
| 
Define rancidity. What kind of substance are used to prevent rancidity? Explain any three 
methods to prevent rancidity. 
 
20. ??E ????? ? ? ??? ???? ??<??: 
(i) ?? ?? ?? ??? ? ???? ?? ???? ???? ?? ???? ???? ?? ???? ???? ?? | 
(ii) ??U ???? [ ??? @????? ??? ???? ????? ?? ??? ???? ???? ?? ???? ??? 
???? [ ?@?+?? ?Z ???? ?? | 
(iii) ??q ? ? ???? ?, ?? ? ? ????? ????m?? ???? ? ? ? ? ???? ? ? ???? ?? ???? ?? 
??? ?????? ?? | 
(iv) ?Z ?? ???? ? ? ???? ? ? ????, ?Z ?? ?? ? ???? ???? ?? ? ?? ?? ?? 
?Z ?| 
(v) ??????? ?? A??? ?? ????? ??? ?????<I? ???? ???? ?? | 
State reason for the following statements: 
(i) Tap water conducts electricity whereas distilled water does not. 
(ii) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloride 
acid does. 
(iii) During summer season, a milkman usually adds a very small amount of baking soda of 
fresh milk. 
(iv) For dilution of an acid, acid is added into water and not water into acid. 
(v) Ammonia is a base but does not contain a hydroxyl group.  
 
21. ? ? s?? ?<d?? ?d ? ? ?? ???? ??<?? | ???? ?A? ??? ??? ???? ??? ?? ???? 
?? ??? ??<?? ???? ???? ?? ?F?? ??`?? ? ? s ???? ???? ?? | ??? ? ??? ??? 
??<??| 
Name the two components of the central nervous system. How are they protected? Name 
the component which is considered as highest coordinating centre of the body. Describe 
its three regions. 
 
22. ???? ???? ? ? ??????? ? ? ??? ?????? ????? | ???? ??? ?? ?? ??? ????? ??? 
?? ?? ???? ?g?? ??? ?g?? ?? 6/5 ???? ?? ??? ?? | ??? ???? ??? ????? 25 
?? ??, ?? ??? ?? ??? ????? ?? ???????? j?? ????? | /?? ??? ? ???? 
?? ?? ???? ???? ???C ????? | 
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