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And one more example......Mixing LEAD NITRATE solution WITH POTASSIUM IODIDE solution YOU WILL GET TO SEE A YELLOW COLOUR PRECIPITATE OF LEAD IODIDE One more example.....Iron nickel in Copper sulphate solution which is blue in colour reaction with iron its blue colour fades.

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Adarsh Dwivedi 4 years, 1 month ago

When we react copper sulphate of blue colour solution with zinc metal. Because zinc is more reactive then copper zinc will displace the copper and it will colour brown.

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Exchanging information through image is called which communication?

Posted by Ahala Fatima 4 years, 1 month ago

CBSE > Class 10 > Information Technology (402)

5 answers

Harshita Sahu 4 years, 1 month ago

Visual

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Dhairya Sharma? 4 years, 1 month ago

Verbal

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Rohan Sharma 4 years, 1 month ago

Hlo

1Thank You

Kuldeep Rajbhar 4 years, 1 month ago

Visual Communication

3Thank You

Adarsh Dwivedi 4 years, 1 month ago

Image?

1Thank You

ANSWER

√34=√45

Posted by Bishal Singha 4 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Date sheet | OMR Sheet CBSE Sample Paper (2021-22) Class-10 Mathematics (Basic) Time Allowed: 90 minutes Maximum Marks: 40 General Instructions: The question paper contains three parts A, B and C. Section A consists of 20 questions of 1 mark each. Attempt any 16 questions. Section B consists of 20 questions of 1 mark each. Attempt any 16 questions. Section C consists of 10 questions based on two Case Studies. Attempt any 8 questions. There is no negative marking. SECTION A Section A consists of 20 questions. Any 16 questions are to be attempted A box contains cards numbered 6 to 50. A card is drawn at random from the box. The probability that the drawn card has a number which is a perfect square like 4,9….is In a circle of diameter 42cm, if an arc subtends an angle of 60o at the centre where = , then the length of the arc is cm 11 cm 22 cm 44 cm If sin = x and sec = y, then tan is xy The pair of linear equations y = 0 and y = -5 has One solution Two solutions Infinitely many solutions No solution A fair die is thrown once. The probability of even composite number is 0 1 8 chairs and 5 tables cost ₹ 10500, while 5 chairs and 3 tables cost ₹ 6450. The cost of each chair will be ₹ 750 ₹ 600 ₹ 850 ₹ 900 If cos + cos2 = 1, the value of sin2 + sin4 is -1 0 1 2 The decimal representation of will be Terminating Non-terminating Non-terminating and repeating Non-terminating and non-repeating The LCM of 23 32 and 22 33 is 23 33 23 33 22 32 The HCF of two numbers is 18 and their product is 12960. Their LCM will be 420 600 720 800 In the given figure, DE BC. Which of the following is true? The co-ordinates of the point P dividing the line segment joining the points A (1, 3) and B (4, 6) internally in the ratio 2:1 are (2, 4) (4, 6) (4, 2) (3, 5) The prime factorisation of 3825 is 3 52 21 32 52 35 32 52 17 32 25 17 In the figure given below, AD = 4cm,BD = 3cm and CB = 12 cm, then cot equals If ABCD is a rectangle , find the values of x and y X = 10, y = 2 X = 12, y = 8 X = 2, y = 10 X = 20, y = 0 In an isosceles triangle ABC, if AC = BC and AB2 = 2AC2, then the measure of angle C will be 30o 45o 60o 90o If -1 is a zero of the polynomial p(x) = x2 - 7x - 8, then the other zero is -8 -7 1 8 In a throw of a pair of dice, the probability of the same number on each die is The mid-point of (3p, 4) and (-2, 2q) is (2, 6). Find the value of p + q 5 6 7 8 The decimal expansion of will terminate after how many places of decimals? 1 2 3 4 SECTION B Section B consists of 20 questions of 1 mark each. Any 16 questions are to be attempted The perimeter of a semicircular protractor whose radius is ‘r’ is + 2r + r r r + 2r If P (E) denotes the probability of an event E, then 0< P(E) 1 0 < P(E) < 1 0 P(E) 1 0 P(E) <1 In ABC, ˂B=90o and BD AC. If AC = 9cm and AD = 3 cm then BD is equal to cm cm cm cm The pair of linear equations 3x + 5y = 3 and 6x + ky = 8 do not have a solution if K = 5 K = 10 K 10 K 5 If the circumference of a circle increases from 2 to 4 then its area ________ the original area Half Double Three times Four times Given that sin = ,then tan is equal to If x = 2sin2 and y = 2cos2 + 1 then x + y is 3 2 1 If the difference between the circumference and the radius of a circle is 37cm , = , the circumference (in cm) of the circle is 154 44 14 7 The least number that is divisible by all the numbers from 1 to 10 (both inclusive) 100 1000 2520 5040 Three bells ring at intervals of 4, 7 and 14 minutes. All three rang at 6 AM. When will they ring together again? 6:07 AM 6:14 AM 6:28 AM 6:25 AM What is the age of father, if the sum of the ages of a father and his son in years is 65 and twice the difference of their ages in years is 50? 40 years 45 years 55 years 65 years What is the value of (tan cosec) 2 -(sin sec)2 -1 0 1 2 The perimeters of two similar triangles are 26 cm and 39 cm.The ratio of their areas will be 2:3 6:9 4:6 4:9 There are 20 vehicles-cars and motorcycles in a parking area. If there are 56 wheels together, how many cars are there? 8 10 12 20 A man goes 15m due west and then 8m due north. How far is he from the starting point? 7m 10m 17m 23m What is the length of an altitude of an equilateral triangle of side 8cm? cm cm cm cm If the letters of the word RAMANUJAN are put in a box and one letter is drawn at random. The probability that the letter is A is Area of a sector of a circle is 1/6 to the area of circle. Find the degree measure of its minor arc. 90o 60o 45o 30o A vertical stick 20m long casts a shadow 10m long on the ground. At the same time a tower casts a shadow 50m long. What is the height of the tower? 30m 50m 80m 100m What is the solution of the pair of linear equations 37x + 43y = 123, 43x + 37y = 117? x = 2,y = 1 x = -1,y = 2 x = -2,y = 1 x = 1,y = 2 SECTION C Case study based questions Section C consists of 10 questions of 1 mark each. Any 8 questions are to be attempted. Case Study -1 Pacific Ring of Fire The Pacific Ring of Fire is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur. In a large horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and plate movements. https://commons.wikimedia.org/wiki/File:Pacifick%C3%BD_ohniv%C3%BD_kruh.png Fault Lines https://commons.wikimedia.org/wiki/File:Faults6.png Large faults within the Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Positions of some countries in the Pacific ring of fire is shown in the square grid below. Based on the given information, answer the questions NO. 41-45 The distance between the point Country A and Country B is 4 units 5 units 6 units 7 units Find a relation between x and y such that the point (x,y) is equidistant from the Country C and Country D x - y = 2 x + y = 2 2x - y = 0 2x + y = 2 The fault line 3x + y – 9 = 0 divides the line joining the Country P(1, 3) and Country Q(2, 7) internally in the ratio 3: 4 3: 2 2: 3 4: 3 The distance of the Country M from the x-axis is 1 units 2 units 3 units 5 units What are the co-ordinates of the Country lying on the mid-point of Country A and Country D? (1, 3) (2, ) (4, ) (, 2) Case Study -2 ROLLER COASTER POLYNOMIALS https://images.app.goo.gl/WfcM1aRTHijatvT27 Polynomials are everywhere. They play a key role in the study of algebra, in analysis and on the whole many mathematical problems involving them. Since, polynomials are used to describe curves of various types engineers use polynomials to graph the curves of roller coasters. Based on the given information, answer the questions NO. 46-50. If the Roller Coaster is represented by the following graph y = p(x) , then name the type of the polynomial it traces. Linear Quadratic Cubic Bi-quadratic The Roller Coasters are represented by the following graphs y=p(x). Which Roller Coaster has more than three distinct zeroes? If the Roller Coaster is represented by the cubic polynomial t(x) = px3 + qx2 + rx + s ,then which of the following is always true s 0 r 0 q 0 p 0 If the path traced by the Roller Coaster is represented by the above graph y = p(x), find the number of zeroes? 0 1 2 3 -3, -6, -1 2, -6, -1 -3, -1, 2 3, 1, -2

Posted by Udit Choubey 4 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Parth Chaturvedi 4 years, 1 month ago

Khana Kya chahte ho??

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Vishu Singh 4 years, 1 month ago

.............

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ANSWER

Her rude behavior vexed us change to passive voice

Posted by Amisha Singh 4 years, 1 month ago

CBSE > Class 10 > English Language and Literature

1 answers

Avinash Kaur 4 years, 1 month ago

We were vexed by her rude behaviour.

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ANSWER

What is the chemical formula of rust

Posted by Goon Nagpal 4 years, 1 month ago

CBSE > Class 10 > Science

4 answers

Ayushi Singh 4 years, 1 month ago

Fe203.xH2O

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Laxmi Kumari 4 years, 1 month ago

Feso4.xh2o4

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Sai Vijay Vardhan Doma Venkata 4 years, 1 month ago

Fe2O3.xH2O

1Thank You

Shivam Sharma 4 years, 1 month ago

Fe3O4.xH2O

1Thank You

ANSWER

Plz tell when is our term 1 board, punjabi exam??

Posted by Ramandeep Kaur 4 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Samruddhi ? 4 years, 1 month ago

20th November.

2Thank You

ANSWER

Can I get sample papers for gujarati

Posted by Yankita Shastri 4 years, 1 month ago

CBSE > Class 10 > Regional Language

1 answers

Anandita 1 4 years, 1 month ago

https://in.docworkspace.com/d/sAOooUUaDqJBYpuKv66qnFA

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ANSWER

Is all physical changes reversible?

Posted by Moksh Yadav 4 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Manisha Virodhia 4 years, 1 month ago

Yes Because we don't get any new substance frm that change

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Adarsh Dwivedi 4 years, 1 month ago

Yes correct answer

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Shreya Bali 4 years, 1 month ago

All physical changes are not reversible. cutting of tree is an irreversible physical change. All chemical changes are not necessarily irreversible. ?

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ANSWER

Which is the largest and smallest cell.

Posted by Ayush Kumar 4 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Adarsh Dwivedi 4 years, 1 month ago

Satisfied or not

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Adarsh Dwivedi 4 years, 1 month ago

1Thank You

Adarsh Dwivedi 4 years, 1 month ago

Large is egg of ostrich Small is mycoplasma

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ANSWER

I want cbse assamese Telangana telugu sample paper class10 term1

Posted by Indrasena Buddhavarapu 4 years, 1 month ago

CBSE > Class 10 > हिंदी ब

1 answers

Kanhaiya Yadav 4 years, 1 month ago

Bolo

4Thank You

ANSWER

What is the squre root of 100001001

Posted by Shreyas Kaddi 4 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Adarsh Dwivedi 4 years, 1 month ago

10,000.05004.........

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Shreyas Kaddi 4 years, 1 month ago

Tell pls

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ANSWER

Q. A 12 cm rod is held between a flashlight and a wall as shown. Find the length of the shadow on the wall if the rod is 45 cm from the wall and 15 cm from the light.

Posted by Moksh Yadav 4 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the quadrant of a circle whose circumference is 22 cm

Posted by Abhay Khare 4 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Ayushi Singh 4 years, 1 month ago

77/8 cm²

1Thank You

Raghav Sharma 4 years, 1 month ago

Solution: Let the radius of the circle be 'r' Thus, the circumference C = 2πr Therefore, r = C/2π A quadrant of a circle means one of the four equal parts. Therefore, the area of a quadrant = 1/4 × Area of a circle = 1/4 × πr2 Circumference (C) = 22 cm Therefore, radius (r) = C/2π = 22/(2 × 22/7) = (22 × 7)/(2 × 22) = 7/2 cm Therefore, the area of a quadrant = 1/4 × πr2 = 1/4 × 22/7 × 7/2 × 7/2 = 77/8 cm2

3Thank You

Devstar Bro 4 years, 1 month ago

77/8

2Thank You

ANSWER

If x and y are complementary angles then

Posted by Ridhima Gola 4 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Pragati Singh 4 years, 1 month ago

Sum of angle x and y is 90°

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Kuldeep Rajbhar 4 years, 1 month ago

sec(x) = cosec(y)

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ANSWER

Please send syllabus pdf for computer term 1 exam

Posted by Atharv Narayan 4 years, 1 month ago

CBSE > Class 10 > Information Technology (402)

0 answers

ANSWER

Which of these statements is not a valid reasons for the depletion of glora and fauna

Posted by Zara Khan Zara Khan 4 years, 1 month ago

CBSE > Class 10 > Social Science

3 answers

Trupti Toke 4 years, 1 month ago

India

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Niroj Kumar 4 years, 1 month ago

China

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Suraj Yadav 4 years, 1 month ago

India

2Thank You

ANSWER

Haldar Sahab Kaun the aur vah Murti Kyon banvana Chahte the

Posted by Sachin Baghel 4 years, 1 month ago

CBSE > Class 10 > हिंदी ए

1 answers

Gyanchand Yadav 4 years, 1 month ago

I think the question is wrong because haldaar sahab murti banvanna hi nhi chahte the

2Thank You

ANSWER

Mercy

Posted by Ajaz Ahmed 4 years, 1 month ago

CBSE > Class 10 > English Language and Literature

0 answers

ANSWER

Which country is the largest producer of oil seeds in the world

Posted by Harshita Singh 4 years, 1 month ago

CBSE > Class 10 > Social Science

4 answers

Rishabh Kumar 4 years, 1 month ago

India in groundnuts

1Thank You

Lakshay Jawla 4 years, 1 month ago

India

1Thank You

Nihari Sree Daddisetty 4 years, 1 month ago

India

1Thank You

Anushka Tyagi 4 years, 1 month ago

India

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ANSWER

Attempt a brief character sketch of the teacher mis Mas annihilating understanding and sensitive to the main issue particular related to the students from hundred dresses 2

Posted by Mohammed Malik 4 years, 1 month ago

CBSE > Class 10 > English Language and Literature

0 answers

ANSWER

Assume there are four families in a country. The average per capita income of these families is Rs 5000. If the income of three families is Rs 4000, Rs 7000 and Rs 3000 respectively, what is the income of the fourth family. Explain with step

Posted by Priya . 4 years, 1 month ago

CBSE > Class 10 > Social Science

5 answers

Ayushman Swain 4 years, 1 month ago

Rs. 6000

3Thank You

Aman Yadav 4 years, 1 month ago

6000

1Thank You

Harsh Sharma 4 years, 1 month ago

Solution, *4000+7000+3000+Family 4/4=5000 *14000+ Family 4/4 =5000 *14000+Family 4=20,000 *Family 4=20,000-14000 *Family 4=6000.…(Final Answer)

3Thank You

Harsh Sharma 4 years, 1 month ago

Given Avg. Income=5000 Family 1+ Family 2+ Family 3+ Family 4. /4 =5000

2Thank You

Harsh Sharma 4 years, 1 month ago

Avg. Income=Total income/Total number of families

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ANSWER

On the last sunday of november unseen passage

Posted by Ramneet Kaur 4 years, 1 month ago

CBSE > Class 10 > English Language and Literature

0 answers

ANSWER

Assessment

Posted by Akshu Bhai 4 years, 1 month ago

CBSE > Class 10 > Information Technology (402)

0 answers

ANSWER

short note on bholi

Posted by Rafiq Najar 4 years, 1 month ago

CBSE > Class 10 > Social Science

0 answers

ANSWER

Who is Giuseppe Mazzini?

Posted by Sri Ram 4 years, 1 month ago

CBSE > Class 10 > Social Science

3 answers

Naina Gupta 4 years, 1 month ago

An Italian Revolunatory

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Bhavan Gokul 4 years, 1 month ago

He was a Italian revolutionary who was born in 1807, Genoa.He was a member of secret society carbonari and he formed secret societies young Italy in mersailles and young Europe in bernes.He was sent in exile for attempting revolution in Liguria

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Anushka Tyagi 4 years, 1 month ago

Giuseppe Mazzini was a politician, a journalist, an Italian unification activist and a spearhead of the new Italian movement. ... He was a lawyer, a Journalist and a writer by profession. He was born in Genoa on 22nd June 1807 and died on 10th March 1872.

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ANSWER

Groundwater overuse in India is how much_________ of country

Posted by Gausik Srinivasan 4 years, 1 month ago

CBSE > Class 10 > Social Science