Class 10 CBSE Standard Maths Specimen 2023

Maximum Marks: 80

Time Allowed: Three hours

This Question Paper has 5 Sections A, B, C, D, and E.
Section A has 20 Multiple Choice Questions (MCQs) carrying 1 mark each.
Section B has 5 Short Answer-I (SA-I) type questions carrying 2 marks each Section C has 6 Short Answer-II (SA-II) type questions carrying 3 marksach.
Section D has 4 Long Answer (LA) type questions carrying 5 marks each Section E has 3 Case Based integrated units of assessment (4 marksch) with sub-parts of the values of 1, 1 and 2 marks each respectively.
All Questions are compulsory. However, an internal choice in 2 of 2 marks, 2 Qs of 3 marks and 2 Questions of 5 marks has been provided. An internal choice has been provided in the 2 marks questions of Section E.
Draw neat figures wherever required. Take π =22/7 wherever reired if not stated.

class 12 ISC Chemistry Specimen Question Paper 2023

SECTION A



Question 1

Let a and b be two positive integers such that a = p3q4 and b = p2q3 , where p and q are prime numbers. If HCF(a,b) = pmqn and LCM(a,b) = prqs, then (m+n)(r+s)=
  1. 15
  2. 30
  3. 35
  4. 72

Solution

Question 2

Let p be a prime number. The quadratic equation having its roots as factors of p is
  1. x2–px +p=0
  2. x2 –(p+1)x +p=0
  3. x2+(p+1)x +p=0
  4. x2–px+p+1=0

Solution

Question 3

If α and β are the zeros of a polynomial f(x) = px2– 2x + 3p and α + β = αβ, then p is
  1. -2/3
  2. 2/3
  3. 1/3
  4. -1/3

Solution

Question 4

If the system of equations 3x+y =1 and (2k-1)x +(k-1)y =2k+1 is inconsistent, then k =
  1. -1
  2. 0
  3. 1
  4. 2

Solution

Question 5

If the vertices of a parallelogram PQRS taken in order are P(3,4), Q(-2,3) and R(-3,-2), then the coordinates of its fourth vertex S are
  1. (-2,-1)
  2. (-2.-3)
  3. (2,-1)
  4. (1,2)

Solution

Question 6

∆ABC~∆PQR. If AM and PN are altitudes of ∆ABC and ∆PQR respectively and AB2: PQ2 = 4 : 9, then AM: PN =
  1. 3:2
  2. 16:81
  3. 4:9
  4. 2:3

Solution

Question 7

If x tan 60°cos 60°= sin60°cot 60°, then x =
  1. cos30°
  2. tan30°
  3. sin30°
  4. cot30°

Solution

Question 8

If sinθ + cosθ = √2, then tanθ + cot θ =
  1. 1
  2. 2
  3. 3
  4. 4

Solution

Question 9

In the given figure, DE ∥ BC, AE = a units, EC =b units, DE =x units and BC = y units. Which of the following is true?
  1. x=
    a+b / ay
  2. x=
    ax / a+b
  3. x=
    ay / a+b
  4. x / y
    =
    a / b

Solution

Question 10

ABCD is a trapezium with AD ∥ BC and AD = 4cm. If the diagonals AC and BD intersect each other at O such that AO/OC = DO/OB =1/2, then BC =
  1. 6cm
  2. 7cm
  3. 8cm
  4. 9cm

Solution

Question 11

If two tangents inclined at an angle of 60ᵒ are drawn to a circle of radius 3cm, then the length of each tangent is equal to
  1. 3√3 / 2
    cm
  2. 3 cm
  3. 6cm
  4. 3√3cm

Solution

Question 12

The area of the circle that can be inscribed in a square of 6cm is
  1. 36π cm2
  2. 18π cm2
  3. 12π cm2
  4. 9π cm2

Solution

Question 13

The sum of the length, breadth and height of a cuboid is 6√3cm and the length of its diagonal is 2√3cm. The total surface area of the cuboid is
  1. 48 cm2
  2. 72 cm2
  3. 96 cm2
  4. 108 cm2

Solution

Question 14

If the difference of Mode and Median of a data is 24, then the difference of median and mean is
  1. 8
  2. 12
  3. 24
  4. 36

Solution

Question 15

The number of revolutions made by a circular wheel of radius 0.25m in rolling a distance of 11km is
  1. 2800
  2. 4000
  3. 5500
  4. 7000

Solution

Question 16

For the following distribution,
  1. 15
  2. 25
  3. 30
  4. 35

Solution

Question 17

Two dice are rolled simultaneously. What is the probability that 6 will come up at least once?
  1. 1/6
  2. 7/36
  3. 11/36
  4. 13/36

Solution

Question 18

If 5 tanβ =4, then
5sinβ- 2cosβ / 5sinβ+ 2cosβ
=
  1. 1/3
  2. 2/5
  3. 3/5
  4. 6

Solution

Question 19

Statement A (Assertion): If product of two numbers is 5780 and their HCF is 17, then their LCM is 340

Statement R( Reason) : HCF is always a factor of LCM

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A)

(b) Both assertion (A) and reason (R) are true and reason (R) is not the correct explanation of assertion (A)

(c) Assertion (A) is true but reason (R) is false
(d) Assertion (A) is false but reason (R) is true

Solution

Question 20

Statement A (Assertion): If the co-ordinates of the mid-points of the sides AB and AC of ∆ABC are D(3,5) and E(-3,-3) respectively, then BC = 20 units

Statement R( Reason) : The line joining the mid points of two sides of a triangle is parallel to the third side and equal to half of it.

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A)

(b) Both assertion (A) and reason (R) are true and reason (R) is not the correct explanation of assertion (A)

(c) Assertion (A) is true but reason(R) is false.

(d) Assertion (A) is false but reason(R) is true.

Solution

SECTION B



Question 21

If 49x+51y= 499, 51 x+49 y= 501, then find the value of x and y

Solution

Question 22

In the given figure below,
AD / AE
=
AC / BD
and ∠1 = ∠2. Show that ∆ BAE~ ∆CAD .

Solution

Question 23

In the given figure, O is the centre of circle. Find ∠AQB, given that PA and PB are tangents to the circle and ∠APB= 75°.

Solution

Question 24

The length of the minute hand of a clock is 6cm. Find the area swept by it when it moves from 7:05 p.m. to 7:40 p.m.

OR

In the given figure, arcs have been drawn of radius 7cm each with vertices A, B, C and D of quadrilateral ABCD as centres. Find the area of the shaded region.

Solution

Question 25

If sin(A+B) =1 and cos(A-B)= √3/2, 0°< A+B ≤ 90° and A> B, then find the measures of angles A and B.

Find an acute angle θ when
cos θ-sin θ / cos θ+sin θ
=
1−√3 / 1+ √3

Solution



SECTION B



Question 26

Given that √3 is irrational, prove that 5 + 2√3 is irrational.

Solution

Question 27

If the zeroes of the polynomial x2 +px +q are double in value to the zeroes of the polynomial 2x2-5x -3, then find the values of p and q.

Solution

Question 28

A train covered a certain distance at a uniform speed. If the train would have been 6 km/h faster, it would have taken 4 hours lessthan the scheduled time. And, if the train were slower by 6 km/hr ; it would have taken 6 hours more than the scheduled time. Find the length of the journey

OR
Anuj had some chocolates, and he divided them into two lots A and B. He sold the first lot at the rate of ₹2 for 3 chocolates and the second lot at the rate of ₹1 per chocolate, and got a total of ₹400. If he had sold the first lot at the rate of ₹1 per chocolate, and the second lot at the rate of ₹4 for 5 chocolates, his total collection would have been ₹460. Find the total number of chocolates he had.

Solution

Question 29

Prove the following that-

Solution

Question 30

Prove that a parallelogram circumscribing a circle is a rhombus

In the figure XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of contact C interesting XY at A and X'Y' at B, what is the measure of ∠AOB

Solution

Question 31

Two coins are tossed simultaneously. What is the probability of getting
  1. At least one head?
  2. At most one tail?
  3. A head and a tail?

Solution

Question 32

To fill a swimming pool two pipes are used. If the pipe of larger diameter used for 4 hours and the pipe of smaller diameter for 9 hours, only half of the pool can be filled. Find, how long it would take for each pipe to fill the pool separately, if the pipe of smaller diameter takes 10 hours more than the pipe of larger diameter to fill the pool?

OR

In a flight of 600km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr from its usual speed and the time of the flight increased by 30 min. Find the scheduled duration of the flight.

Solution

Question 33

Prove that if a line is drawn parallel to one side of a triangle intersecting the other two sides in distinct points, then the other two sides are divided in the same ratio.

Using the above theorem prove that a line through the point of intersection of the diagonals and parallel to the base of the trapezium divides the non parallel sides in the same ratio.

Solution

Question 34

Due to heavy floods in a state, thousands were rendered homeless. 50 schools collectively decided to provide place and the canvas for 1500 tents and share the whole expenditure equally. The lower part of each tent is cylindrical with base radius 2.8 m and height 3.5 m and the upper part is conical with the same base radius, but of height 2.1 m. If the canvas used to make the tents costs ₹120 per m2, find the amount shared by each school to set up the tents

OR

There are two identical solid cubical boxes of side 7cm. From the top face of the first cube a hemisphere of diameter equal to the side of the cube is scooped out. This hemisphere is inverted and placed on the top of the second cube’s surface to form a dome. Find
  1. the ratio of the total surface area of the two new solids formed
  2. volume of each new solid formed.

Solution

Question 35

The median of the following data is 525. Find the values of x and y, if the total frequency is 100

Solution

SECTION E



Question 36

A tiling or tessellation of a flat surface is the covering of a plane using one or more geometric shapes, called tiles, with no overlaps and no gaps. Historically, tessellations were used in ancient Rome and in Islamic art. You may find tessellation patterns on floors, walls, paintings etc. Shown below is a tiled floor in the archaeological Museum of Seville, made using squares, triangles and hexagons.


A craftsman thought of making a floor pattern after being inspired by the above design. To ensure accuracy in his work, he made the pattern on the Cartesian plane. He used regular octagons, squares and triangles for his floor tessellation pattern


Use the above figure to answer the questions that follow:
  1. What is the length of the line segment joining points B and F?
  2. The centre ‘Z’of the figure will be the point of intersection of the diagonals of quadrilateral WXOP. Then what are the coordinates of Z?
  3. What are the coordinates of the point on y axis equidistant from A and G?

OR
What is the area of Trapezium AFGH?

Solution

Question 37

The school auditorium was to be constructed to accommodate at least 1500 people. The chairs are to be placed in concentric circular arrangement in such a way that each succeeding circular row has 10 seats more than the previous one.


(i) If the first circular row has 30 seats, how many seats will be there in the 10th row?
(ii) For 1500 seats in the auditorium, how many rows need to be there?
OR
If 1500 seats are to be arranged in the auditorium, how many seats are still left to be put after 10th row?
(iii) If there were 17 rows in the auditorium, how many seats will be there in the middle row?

Solution

Question 38

We all have seen the airplanes flying in the sky but might have not thought of how they actually reach the correct destination. Air Traffic Control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. Actually, all this air traffic is managed and regulated by using various concepts based on coordinate geometry and trigonometry


At a given instance, ATC finds that the angle of elevation of an airplane from a point on the ground is 60°. After a flight of 30 seconds, it is observed that the angle of elevation changes to 30°. The height of the plane remains constantly as 3000√3 m. Use the above information to answer the questions that follow-

(i) Draw a neat labelled figure to show the above situation diagrammatically
(ii) What is the distance travelled by the plane in 30 seconds?
Keeping the height constant, during the above flight, it was observed that after 15(√3 -1) seconds, the angle of elevation changed to 45°. How much is the distance travelled in that duration.
What is the speed of the plane in km/hr

Solution

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