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Science (Code-A) Sample Question Paper for Class X

SECTION-A

1. Ethanol can be used as an additive while using petrol as a fuel. Why? [1]

2. What will happen if all the organisms occupying a trophic level are killed? [1]

3. Name any two vestigial organs present in human beings. [1]

4. Draw the ray diagrams to show a hypermetropic eye and its correction using appropriate lens [2]

5. What is coliform? What does its presence in water indicate? [2]

6. Define global warming. Give its one harmful effect. [2]

7. Consider the following elements : Na, Mg, Al, Si [3]

(i) Which of them reacts with cold water to evolve hydrogen gas?

(ii) Arrange them in the order of their increasing metallic character.

(iii) Which of them has the largest atomic size?

8. (a) What is lateral inversion?

(b) Why concave mirror has a real principal focus, while convex mirror has a virtual principal focus? [3]

9. Calculate the distance at which an object should be placed in front of convex lens of focal length 10 cm to

obtain an image double its size? [3]

10. Give any three differences between food chain and food web. [3]

Time : 3 Hours Max. Marks : 90

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 attempted separately.

4. Question number 1 to 3 in Section-A are one mark question. These are to be answered in one wordor in one sentence.

5. Question numbers 4 to 6 in Section-A are two marks questions. These are to be answered in about30 words each.

6. Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered in about50 words each.

7. Question numbers 19 to 24 in Section-A are five marks questions. These are to be answered in about70 words each.

8. Question numbers 25 to 33 in Section-B are multiple choice questions based on practical skills. Eachquestion is a one mark question. You are to choose one most appropriate response out of the fourprovided to you.

9. Question numbers 34 to 36 in Section-B are questions based on practical skills. Each question is atwo mark question. You are to choose one most appropriate response out of the four provided to you.

SAMPLE QUESTION PAPERSCIENCE (Theory)Class - X (Code-A)

Summative Assessment - II

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Sample Question Paper for Class X Science (Code-A)

11. (i) Name the plants which are used for making slats for huts and bidis. [3]

(ii) Define exhaustible resources.

(iii) What happens when

(a) Coal is burnt in sufficient supply of oxygen.

(b) Coal is burnt in insufficient supply of oxygen.

12. (i) Define :

(a) Inherited traits

(b) Acquired traits

(ii) What are fossils? [3]

13. Give the structures of all possible structural isomers of butane along with their IUPAC names [3]

14. Roshan, a boy from a small village went to a shop to buy washing soap. The shopkeeper suggested him to

buy detergent but Roshan refused to buy detergent and bought soap. He also told shopkeeper that detergent

is not good for environment. Which quality of Roshan is depicted here and also write the disadvantage of

detergents? [3]

15. Atomic numbers of three elements A, B and C are 8, 19 and 10 respectively, now answer the following : [3]

(i) Write the electronic configurations of A and B.

(ii) What is the valency of C and the total number of electrons present in its L shell?

(iii) Write the chemical formula of the compound which is formed when A and B combines.

16. What would be the ratio of genetic makeup of progenies obtained in F1 generation if a heterozygous tall pea

plant is crossed with a dwarf pea plant? [3]

17. What do A, B and C represent in the given figure? Also give one function of each. [3]

C

A

B

Front view

18. Expand IUD. Why are these used? Give two examples. [3]

19. (a) The distance between a real object and its image in a convex mirror of focal length 12 cm is 32 cm. Find

the size of image if the object size is 1 cm. [3]

(b) Draw the ray diagram to show image formation in case of concave mirror when object is placed

(i) In between infinity and centre of curvature.

(ii) In between focus and pole. [2]

20. Complete and balance the following chemical equations : [5]

(i) CH3COOH + Na

(ii) CH3COOC

2H

5 NaOH

(iii) C2H

5OH + O

2

(Sufficient

Oxygen Supply)

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Science (Code-A) Sample Question Paper for Class X

(iv) C2H

4 + H

2 Ni

(v) CH3COOH + NaHCO

3

21. (i) Why wings of bats and birds are analogous characteristics? [5]

(ii) Why forelimbs of mammals and reptiles are homologous characteristics?

22. Draw a longitudinal section of flower and label the following parts :

(i) Stigma

(ii) Sepal

(iii) Petal

(iv) Filament

23. (i) State the laws of refraction of light. [5]

(ii) A light ray travels into a glass slab of refractive index 1.5. If the speed of light in glass slab is 2 × 108 m/s,

compute the speed of light in air.

24. (a) A person with a defective eye is unable to see the objects nearer than 2 m. He wants to read a book at

a distance of 30 cm. Find the focal length and the power of the lens he needs in his spectacles. [3]

(b) Define power of accomodation and state the nature of image formed on the retina of human eye. [2]

SECTION-B

25. When a ray of light enters into a glass slab from air

(1) Its wavelength decreases

(2) Its wavelength increases

(3) Its frequency increases

(4) Neither wavelength nor frequency changes

26. If the magnification of a converging lens is – 1, then the image formed is

(1) Real and inverted, and of the same size as that of the object

(2) Virtual and erect, and of the same size as that of the object

(3) Real and inverted, bigger than the size of the object

(4) Virtual and erect, bigger than the size of the object

27. The rainbow is always formed

(1) Opposite to the sun (2) Above the sun

(3) Below the sun (4) Right side of the sun

28. Ramesh measures the distance of image formed by the convex mirror when object is placed at various

positions. The maximum distance of image of real object from the pole of the convex mirror is (f is focal length)

(1)2

f(2) f

(3) 2 f (4) Infinity

29. A liquid sample turned blue litmus paper red, this indicates that the liquid sample is of

(1) Milk of Magnesia (2) Sodium hydroxide

(3) Vinegar (4) Common salt

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Sample Question Paper for Class X Science (Code-A)

30. Which of the following is generally used as a preservative for pickles and sauces?

(1) Ethanol (2) Acetone

(3) Formaldehyde (4) Acetic acid

31. A student wants to make vinegar, which of the following acids he must take?

(1) Ethanoic acid (2) Formic acid

(3) Tartaric acid (4) Citric acid

32. Which of the following flowers are unisexual?

(1) Hibiscus and mustard

(2) Papaya and watermelon

(3) Hibiscus and watermelon

(4) Papaya and mustard

33. Inner covering of seed coat in a dicot seed is known as

(1) Tigellum (2) Epicotyl

(3) Testa (4) Tegmen

34. A student observed the path of light when it travels from medium of refractive 2 to refractive index

1 as shown

below. What can be said about the two media?

r

i

Source of light

Medium-II

Medium-I

2

1

35. Two samples of water A and B are provided to a student of class Xth and his observations about the nature of

the samples is as follows :

Sample A : Soap easily form lather in it.

Sample B : Soap does not form lather easily

Classify samples A and B on the basis of hardness and give the reason for the hardness of water.

36. In a biology practical class, Sheela wants to show her students the process of budding to make the concept

more clear.

(a) Name the two organisms which Sheela can select for the above process.

(b) Define budding.

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Mathematics (Code-A) Sample Question Paper for Class X

General Instructions :

1. All questions are compulsory.

2. The question paper consists of 31 questions divided into 4 sections-A, B, C and D.

3. Section-A comprises of 4 questions of 1 mark each. Section-B comprises of6 questions of 2 marks each. Section-C comprises of 10 questions of 3 marks each andSection D comprises of 11 questions of 4 marks each including 1 value based question.

4. There is no overall choice in this question paper.

5. Use of calculators is not permitted.

SECTION-A

1. Find the probability of getting a prime number when a dice is thrown once.

2. Find the distance between the points (3, –5) and (–6, 8).

3. A ladder leaning against a wall makes an angle of 60° with the ground. If the length of the ladder is 41 m,

then find the distance of the foot of the ladder from the wall.

4. If (in degrees) is the angle of a sector of a circle of radius 7 cm, then find the area of the sector.

SECTION-B

5. A copper rod of 2 cm diameter and 4 cm length is drawn into a wire of uniform diameter and length 16 m.

Find the radius of the wire.

6. Find the volume of the frustum of a cone if its height is 42 cm and the radii of its ends are 25 cm and

35 cm.

7. Prove that in two concentric circles, the chord of the larger circle, which touches the smaller circle, is bisected

at the point of contact.

8. The radii of two circles are 15 cm and 8 cm respectively. Find the radius of the circle having area equal to

the sum of the areas of the two circles.

9. A spherical steel ball is melted to make 27 new identical balls. Find the ratio of radius of each new ball to

the radius of the original ball.

10. If 8th term of A.P. is zero, then show that 28th term is double the 18th term.

Time : 3 Hours Max. Marks : 90

SAMPLE QUESTION PAPERMATHEMATICS

Class - X (Code-A)Summative Assessment - II

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Sample Question Paper for Class X Mathematics (Code-A)

SECTION-C

11. A right triangle whose perpendicular sides are 12 cm and 5 cm is made to revolve around its hypotenuse. Find

the volume of the solid so obtained.

12. Determine the ratio in which the line 4x + 3y – 21 = 0 divides the line segment joining the points (1, 5) and

(3, 7).

13. The sum of 3rd and 7th term of an AP is 62 and sum of 5th and 11th term is 92. Find the AP.

14. In the given figure, XY is a tangent to the circle at point P with centre O. If PAB = 42° and BPY = BAP,then find the measure of APX and BPO.

42°

AX

Y

O

B

P

15. From an observer flying in an aeroplane, the angles of depression of two ships, left and right side of the plane,

in a river is found to be 60° and 30° respectively. If the distance between the ships is 1 km, then find the height

of the aeroplane above water level.

16. The speed of the stream of a river is 3 km/h. A boat goes 55 km downstream and returns to the same point

in 16 hours. Find the speed of the boat in still water.

17. How many three-digit numbers are divisible by 7?

18. If two dice are thrown simultaneously, then find the probability of getting

(i) Same number on both the dice.

(ii) A total of at least 10.

(iii) A doublet of even number.

19. A man is cycling such that the wheels of the cycle are making 130 revolutions per minute. If the diameter of

the wheel is 63 cm, then calculate the speed per hour with which the man is cycling.

20. If the coordinates of the mid-points of the sides of a triangle are (1, 5), (9, 8) and (–3, 6), then find the

coordinates of the vertices of the triangle.

SECTION-D

21. One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting

(i) A black card

(ii) An ace of spades

(iii) Non-ace

(iv) Neither king nor a jack

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Mathematics (Code-A) Sample Question Paper for Class X

22. In the given figure, l and m are two parallel tangents to the circle with centre O and another tangent AB with

point of contact C intersecting l at A and m at B. Find the measure of AOB.

P Al

m

C

O

Q B

23. The difference of squares of two numbers is 320. The square of the smaller number is 16 more than 10 times

the larger number. Find the two numbers.

24. Draw a circle of radius 6 cm. From a point 9 cm away from the centre of the circle, construct the pair of

tangents to the circle.

25. In the given figure, PQRS is a diameter of circle of radius 9 cm. The lengths PQ, QR and RS are equal and

semi-circles are drawn on PQ and QS as diameters. Find the area of shaded region.

Q RSP

26. Construct a triangle with sides 6 cm, 8 cm and 9 cm and then a triangle similar to it whose sides are 5

3 of

the corresponding sides of the first triangle.

27. From a point on the ground, the angles of elevation of a 20 m tall tower and of helicopter hovering at some

height over the top of the tower are 30° and 45° respectively. Find the height of helicopter above the tower.

[Take 3 1.732 ]

28. Mr. Sharma bought milk in a container and distributed it among needy people. The container (open at the top)

made up of a metal sheet is in the form of a frustum of a cone of height 16 cm with radii of its lower and

upper ends as 6 cm and 18 cm respectively.

(i) Find the approximate cost of milk when container is completely filled with milk at the rate of ` 38 per litre.

[Use = 3.14]

(ii) What value is depicted by Mr. Sharma?

29. On the ground, 100 stones are placed such that the distance between the first and the second is 1 m, between

second and third is 3 m, between third and fourth is 5 m and so on. How far will a person have to travel to

bring them one by one to the basket placed at the first stone, if he starts from the basket?

30. Find the area of ABC, whose coordinates are (0, –3), (3, 0), (0, 2) and the area of DEF whose coordinatesare (0, –3), (–5, 0) and (0, 2).

31. The sum of two numbers is 12. If the sum of their reciprocals is 3

8, then find the numbers.

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