Name of the Board : CBSE Academic
Class : X STD
Document Type : Sample Question Paper
Subject : Science
Year : 2016 – 2017
Website : http://cbseacademic.in/SQP_CLASSX_2016_17.html
Download Sample Question Paper : https://www.pdfquestion.in/uploads/10169-ScienceX17.pdf
Marking Scheme : https://www.pdfquestion.in/uploads/10169-ScienceMS.pdf
Science Sample Question Paper :
Time allowed : 03 Hours
Maximum Marks : 90
General Instructions :
(i) The question paper comprises two sections, A and B. You are to attempt both the sections.
(ii) All questions are compulsory.
Update : CBSE Class X Science Sample Question Paper 2019-20 : www.pdfquestion.in/34650.html
(iii) There is no choice in any of the question.
(iv) All questions of Section-A and B are to be attempted separately.
(v) Question numbers 1 to 3 in Section-A are one mark question. They are to be answered in one word or in one sentence.
(vi) Question numbers 4 to 6 in Section- A are two marks questions. These are to be answered in 30 words each.
(vii) Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered in about 50 words each.
(viii) Question numbers 19 to 24 in Section-A are 5 marks questions. These are to be answered in 70 words each.
(ix) 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.
(x) Question numbers 34 to 36 in Section B are two marks questions based on practical skills. These are to be answered in brief.
Section A :
1. Name the process of converting vegetable oil to vegetable ghee. 1
2. List two secondary sexual characters of males that are different from that of females. 1
3. Write the main function of Ozone in the upper atmosphere 1
4. When a concave mirror is placed facing the Sun, the Sun’s rays converge to a point 10 cm from the mirror. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would see the size of the image? Draw a ray diagram to justify your answer. 2
5. If you find coliform bacteria in a sample of water collected from a river, what would you conclude? Give reason for such kind of water pollution. 2
6. Which natural resources are called the “biodiversity hot spots”? How these hot spots maintain ecological balance? 2
7. What are isomers? “Isomers of the first three members of alkane series are not possible”. Give reason to justify this statement and draw structures of two isomers of butane, C4 H10. 3
8. An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation ‘X’ gives ‘Y’ which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound ‘Z’ which has a pleasant smell. Identify X, Y and Z. also write chemical equations to show the formation of Y and Z. 3
9. An element ‘A’ belongs to 3rd period and 17th group of the periodic table.
a) Write atomic member and electronic configuration of ‘A’
b) State whether A is a metal or a non – metal.
c) Write the nature of bond formed if A reacts with another element B of electronic configuration 2, 8, 1.
d) Write the chemical formula of the compound formed. 3
10. Consider the following elements 4Be, 9F, 19K, 20Ca
a) Select the element having one election in the outer most shell.
b) Select two elements of the same group.
c) Write the formula and state the nature of the Compound formed when the element K reacts with an element X of electronic configuration 2, 8, 7. 3
11. Explain with the help of labelled diagrams the development that takes place in each of the body parts of a Planaria where body is cut into three pieces. None this process and give an example of an organism in which a similar process can be observed. 3
12. List any four methods of contraception used by humans. How does the use of three methods have a direct effect on the heath and prosperity of a family? 3
13. List two functions each of the following points of human female reproductive system
a) Ovaries
b) Fallopian tubes
c) Uterus 3
14. “Different species use different strategies to determine sex of a new born individual. It can be environmental cues or genetically determined”. Justify this statement giving reason/example. 3
15. List in tabular form, two distinguishing features between the acquired traits and the inherited traits with one example of each. 3
Section B :
25. In the preparation of soap, sodium chloride causes:
(a) complete saponification.
(b) complete hydrolysis.
(c) complete neutralization.
(d) complete precipitation. 1
26. Vishakha carried out saponification reaction in the lab and she gave following comments as:
(i) Soap is salt of fatly acid.
(ii) Heat is absorbed in this reaction.
(iii) Reaction mixture is basic in nature
(iv) These are neutralization reaction
The correct statements are
(a) (i) & (iii)
(b) (ii) & (iv)
(c) (i) & (ii)
(d) (i), (ii) & (iii) 1
27. Select from the following salts which may be used to prepare hard water required for the experiment.
A. CaSO4 B. Na2SO4 C. CaCl2
D. K2SO4 E. NaHCO3 F. MgCl2
1. A, B and D
2. A, C and F
3. B, D and E
4. C, E and F 1
28. Four students A,B,C and D did their experiment of finding the focal length of convex lens by obtaining image of a distant object as follows:
Student A used the window grill in the laboratory as the object and a white paper sheet held in hand as the screen.
Student B used a distant tree in the shade and a white thick held in a stand as the screen.
Student C used a well illuminated laboratory window grill as the object and a white paper sheet held in a stand as the screen.
Student D used a well illuminated distant tree as the object and a white thick board held in a stand as the screen.
Which student has used the correct method for performing experiment out of the above setups?
(a) A
(b) B
(c) C
(d) D 1
29. In the setup shown below, a clear image of a distant object is obtained on the screen. The focal length of the concave mirror is:
(a) 11.4 cm
(b) 9.4 cm
(c) 9.8cm
(d) 9.9cm
30. In the experiment on refraction of light through a rectangular glass slab done by four students A, B, C and D, the following observations were made:
(A) The emergent ray moves towards the normal after second refraction through glass slab with < i = <e
(B) The emergent ray moves away from the normal after second refraction through glass slab <i < e
(C ) For any angle of incidence, always <I = <e, always.
(d) The emergent ray moves away from normal after second refraction through glass slab with <i=>e
The student who has made the correct observation is
(a) (A)
(b) (B)
(c ) (C )
(d) (D)