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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 a ray diagram to show the correction of myopic eye. [2]

5. Why are forests known as ‘biodiversity hotspots’? [2]

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

7. Consider the following atoms : N, O, F, B [3]

(i) What is common in them?

(ii) Arrange them in the order of their increasing atomic radii.

(iii) Which of them has the most non-metallic nature?

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]

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 multiple choice questions based on practical skills. Eachquestion is a two mark question. You are to choose one most appropriate response out of the fourprovided 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)

10. Explain how ciliary muscles adjust the focal length of the eye lens. [3]

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. Give three examples of Dobereiner’s triads? [3]

13. Give the structures of all possible isomers of C5

H12

. [3]

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

to buy detergent rather washing soap as it gives good results. Which quality of shopkeeper is depicted here

and what are the advantages of detergents over soaps?

15. Atomic numbers of three elements A, B and C are 17, 18 and 20 respectively, then answer the following : [3]

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

(ii) What is the valency of B and C?

(iii) Write the chemical formula of the compound which is formed when A and C 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]

B

C

A

Front view

18. Expand IUD. Why are these used? Give one example. [3]

19. (i) A person suffering from hypermetropia cannot focus distinctly on objects closer than 100 cm. What is

the power of lens that will permit him to read from a distance of 25 cm? [2½]

(ii) Explain why sun appears reddish at the time of sunrise and sunset? [2½]

20. Complete the following chemical equations : [5]

(i) 2C2H

5OH + 2Na

(ii) CH3COOH + C

2H

5OH Acid

(iii) C2H

5OH

2 4Conc.H SO

443 K

(iv) C2H

4 + H

2 Ni

(v) CH3COOH + Na

2CO

3

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

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

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

22. Draw a longitudinal section of pistil showing pollen germination and label the following parts : [5]

(i) Pollen tube

(ii) Pollen grain

(iii) Secondary nucleus

(iv) Ovary

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. Write any five limitations of Mendeleev’s Periodic Table. [5]

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. Which of the following is used by dentists to examine the teeth of patients?

(1) Convex mirror (2) Concave lens

(3) Plane mirror (4) Concave mirror

28. 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

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

(1) Ethanol (2) Acetone

(3) Formaldehyde (4) Acetic acid

30. 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

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

31. Which of the following flowers are bisexual?

(1) Hibiscus and mustard

(2) Papaya and watermelon

(3) Hibiscus and watermelon

(4) Papaya and mustard

32. The reproductive organ in human which produces male gametes is located in

(1) Penis (2) Scrotum

(3) Urethra (4) Vas deferens

33. The pore through which seeds absorb water during seed germination is called

(1) Micropyle (2) Radicle

(3) Hilum (4) Plumule

34. If 2

>1, then which of the following options is correct according to the given figure?

(1)1

2

sin

sin

i

r

(2)1

2

sin

sin

i

r

r

Source of light

i

(3)2

1

sin

sin

i

r

(4)1

2

sin i

35. The function of sodium hydroxide solution in the formation of soap is to

(1) Reduce the vegetable oils (2) Hydrolyse the vegetable oils

(3) Dehydrate the vegetable oils (4) Oxidise the vegetable oils

36. Identify the correct diagram showing an amoeba undergoing binary fission.

(a) (b) (c) (d)

(1) (a) (2) (b)

(3) (c) (4) (d)

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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 two digit number from 1 to 80 which is divisible by 5.

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. In the given figure, if O is the centre of the circle, AB is a tangent and radius of the circle is 14 cm, then

find the length of OB.

30°

O

A B

SECTION-B

5. The volume of a 14 cm long right circular solid cylinder is equal to that of the cube of edge length 11 cm.

Find the radius of the cylinder.

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.

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)

8. In the given figure, a regular hexagon is inscribed in a circle. Find the area of the circle.

14 cm

9. Prove that the tangents drawn at the end points of a diameter of a circle are parallel.

10. If a, b, c are in AP, then show that (a – c)2 = 4(b2 – ac).

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 – 17 = 0 divides the line segment joining the points (1, 3) and

(2, 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. Find the area of the segment AYB, if AOB = 90°, OA = 7 cm and O is the centre of the circle.

O

A B

Y

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 9?

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

(i) A multiple of 4 as the sum

(ii) A total of atmost 4 as the sum

(iii) A doublet

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.

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

SECTION-D

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

(i) The King of spades

(ii) A Jack of black colour

(iii) A face card

(iv) Neither a red card nor a black king

22. Prove that opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre

of the circle.

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, QPR is a right-angled triangle right-angled at P, in which QR = 41 cm and PR = 9 cm. A

circle with centre O is inscribed in this triangle. Find the area of the shaded region.

Q

R

P

O

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. Two pillars of equal height stand on either side of a roadway which is 180 m wide. From a point on the roadway

between the pillars, the elevations of the top of the pillars are 45° and 30° respectively. Find the height of the

pillars.

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. Show that the points (2k, 2k), (–2 3 , 2 3 )k k and (–2k, –2k) are the vertices of an equilateral triangle. Also,

find its area.

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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