KENDRIYA VIDYALAYA JASHPUR

HOLIDAY HOME WORK winter break

CLASS VI

HINDI

१अपने प्रदेश का कोई एक लोकगीत लिखें।

२ आपकी माँ आपके लिए क्या क्या करती है?

३ गोल चमकीला रोडा अपनी क्या कहानी बताता है?

४ वाक्य प्रयोग करें

लुढकना, ढकेलना, गिरना, खिसकना।

५) ‘मेरी प्रिय पुस्तक’पर १५० शब्दों में एक निबंध लिखें।

ENGLISH

1 Unseen passage with question and answer

2  Singular plural

3 Gender

4 Pronoun

5 Paragraph on my best friend and my mother

6 All chapter 2 questions (from textbook)

7 Unseen poem

8 Noun and adjective

MATHS

1. Write the predecessor of :

(a) 94

(b) 10000

2 Write opposite the following

(a) Increase in weight

(b) 30 km north

3.What fraction of a clockwise revolution does the hour hand of a clock turn through , when it goes form: 3 to 9.

4 Write true and fals:-

(a) Zero is the smallest natural number.

(b) 600 is the successor of 599.

(c) 400 is the predecessor of 399.

5 find

(a) 35-(-20) (b) 72-(90)

(c) (-32)-(-40) (d) 23-(-12)

6 Number of children in six different classes are given below. Represent the data on a bar graph .

Class

Fifth

sixth

Seventh

Eight

Nine

Tenth

No . of children

135

120

95

100

90

80

a) How would you choose a scale?

b) Which class has the maximum numbers of children? And the minimum?

c) Find the ratio of student of class 6th of the students of class 8th.

7. Write the following decimals as fraction. Reduce the fraction to lowest term:-

(a) 0.6 (b) 2.5 (c) 1.0 (d) 3.8

8. Express the following as cm using decimals:-

(a) 2mm (b) 116mm (c) 83mm

9. The lid of a rectangle box of sides 40cm by 10cm is scaled all round with tape. What is the length of the tape required?

10. find the area of the squares whose sides are: (a) 10cm (b) 14cm (c)5cm

SCIENCE

Q1. Write short note about herbivores, carnivores and omnivores.

Q2. What is balanced diet?

Q3. Write the process of handpicking.

Q4. Write the object which can reversed and not reversed and draw table.

Q5. Write short note about herbs, shrubs and tree.

Q6. Write five example of :-

i. Circular motion

ii. Periodic motion

iii. Rectilinear motion

Q7. What is filament?

Q8. What is terrestrial habitat and aquatic habitat?

Q9. Write short notes on

i. Reproduction

ii. Respiration

iii. Excretion

iv. Stimulation

Q10. What are the type motion write about it.

Q11. What is SI unit? Give full form

Q12. Write short note on:-

i. Shadow

ii. Reflection

Q13. What is the difference between plant product and animal product.

Q14. Name five plants and there parts that we eat?

Q15. What is soluble substance?

Q.16 What is condensation and evaporation process?

Q17. Stamens, Pistil, Filament, Anther, Sepals and petals? Explain it.

Q18. What is Skelton?

Q19. Explain what is respiration, excretion, reproduction, aquatic habitat?

Q20. Give an example of circular, Periodic and Rectilinear motion?

SST

Q.1 What were the problems that Ashoka wanted to solve by introducing Dhamma?

Q.2 Make a list of the occupations of the people who lived within the Mauryan empire.

Q.3 What are the main teachings of the Mahavira?

Q.4 Describe the ways in which Lord Buddha try to spread his message to the people.

Q.5 Why did Kings want to control the Silk route?

Q.6 What were the main features of bhakti?

Q.7 What do you think ordinary people were attracted to bhakti?

Q.8 What is meant by the solar system?

SANSKRIT

१) १ से १० तक संस्कृत में गिनती लिखें।

२) हवाई जहाज का चित्र बनाएँ।

३) विभिन्न फूलों के संस्कृत नाम लिखें।

४) छात्रप्रतिज्ञा संस्कृत में लिखें।

५) विलोम शब्द लिखें –

सुखम्, दूरे, निर्धनम्, ग्रीष्मे, सरसा।

६) पर्याय शब्द लिखें –

पुस्तके, पिक:, उद्यमेन, वचने, धरित्री।

CLASS VII

HINDI

१ ‘भोर और बरखा’ के आधार पर भोर का वर्णन करें।

२ ‘वीर कुँवर सिंह’ पर १५० शब्दों में एक निबंध लिखें।

३ ‘नीलकंठ’ पाठ का क्या संदेश है?

४ अपने प्रदेश के किसी एक व्यंजन को बनाने की विधि लिखें।

५ ‘एक तिनका’ पाठ का भावार्थ लिखते हुए इसका संदेश स्पष्ट करें।

६ ‘पुस्तकों का महत्त्व’ पर एक अनुच्छेद लिखें ।

ENGLISH

1. 2 unseen passage (1 prose, 1 poetry)

2. Application sister's marriage

3. Grammar

MATHS

1. Find the area of square park whose perimeter is 320.

2. The perimeter of a rectangular sheet is 100 cm. If the length is 35 cm, find its breadth.

3. Find the circumference of the circles with the following radius:

(a) 14 cm

(b) 28 cm

(c) 21 cm

4. If the circumference of a circular sheet is 154 m, find its radius. Also find the area of the sheet.

5. Construct triangle ABC, given angle A= 600, angle B= 300 and AB=5.8 cm.

6. Construct triangle ABC with BC=7.5 cm, AC=5 cm and angleC=600.

7. Draw a line ,say AB ,take C outside it. Through C, draw a line parallel to AB using ruler and compasses only.

8. solve :

a) 3/5 + 2/5 b) 9/11 + 4/15 c) 4 + 7/8 d) 2 – 3/5

9.The population of a city decreasedfrom 25,000 to 24/500

10. Abc is a triangle ,right angle at c. If AB=25 cm and AC=7 cm, Find BC.

SCIENCE

1. Draw a diagram for human respiratory system .Write the name of the parts associated with human respiratory system and explain the process of breathing taking place in our body.

2. Draw the diagram of human heart and write the name of its different parts .

3. Define the following :

Plasma ,RBC , WBC ,Platelets

4. Draw the diagram of human extretory system and write the name of its different parts .

5. Write the name of components present in human urine .

6. Differentiate between xylem and phloem found in plants.

7. Write the name of plants which reproduce by steam ,leaf and root .

8. Write the name of reproductive parts found in plants. Draw the diagram of these parts .

9. Differeniate between pollination and fertilisation found in plants .

10. A car moves with a speed of 40 km/hr for 2 hours and then with a speed of 60 km/hr for the next 3 hours .Find the total distance covered by the car.

SST

Q.1 Why did people from distant lands visit Surat?

Q.2 How was the administration of the ahom state organised?

Q.3 Were the banjaras important for the economy?

Q.4 Why do you think ordinary people preserved the memory of Mirabai?

Q.5 What is precipitation?

Q.6 What is water cycle what are Tides and how are they caused?

Q.7 What are ocean currents?

Q.8 Which are the three broad categories of natural vegetation?

Q.9 In which three part of the world are tropical deciduous forests found.

Q.10 In which climatic conditions are citrus fruits cultivated.

SANSKRIT

१) १ से ५० तक संस्कृत में गिनती लिखें ।

२) विलोम पद लिखें –

पुरा, शत्रुताया:, सुखिन:, मानवा: , दु:खी , उन्नत:।

३) ‘स्म’ जोड़कर भूतकालिक क्रिया बनाएँ-

अपठत् = पठति स्म।

अपतत् = ................अवदत् = ...................

अनयत् = ....................अगच्छत्= ...................

४) राष्ट्रीय ध्वज का चित्र बनाएँ ।

५) ‘समवायो हि दुर्जय:’ पाठ को चित्रकथा के रूप में लिखें।

CLASS VIII

HINDI

Q1 नई समस्याओं का महत्वपूर्ण बिंदु लिखिए |

Q2 सुदामा चरित, जहां पहिया है, अंतिम दौर -एक , अकबरी लोटा ,  सूर के पद के प्रश्न उत्तर लिखें और इन सभी को पढ़िए |

ENGLISH

1. Unseen passage

A) Prose

B) Poetry

2. Writing- application

3. Grammar -workbook

A)parts of speech

4. Text book question

A) Honeydew

B) Supplementary (as per syllabus)

MATHS

1. The area of trapezium is 34 cm2 and the length of one of the parallel sides is 10 cm and its height is 4 cm. find the length of the other parallel sides.

2. The diagonals of a rhombus are 7.5 cm and 12 cm. Find its area.

3. Mohan wants to buy a trapezium shaped field. Its side along the river is parallel to and twice the side along the road. The area of this field is 10500 m2 and the perpendicular distance between the two parallel sides is 100 m, find the length of the side along the river.

4. Find the height of a cuboid whose base area is 180 cm2 and volume is 900 cm3?

5. Can a polyhedron have 10 face, 20 edges, 15 vertices?

6. Multiply the binomials:

(a) (2x+5) and (4x-3)

(b) (y-8) and (3y-4)

(c) (a+3b) and (x+5)

7. Evaluate:

(a) 3-2 (b) (-4)-2 (c) -5

8. Find the value:

(a) (30+4-1)x22

(b) (2-1x4-1)÷22

9. Find the value of m for which 5m÷5-3=55

10. Express the following number in usual form:

(1) 3.02x10-6

(2) 4.5x104

(3) 3x10-8

SCIENCE

1. Memorize exercise question answers from chapter force and pressure to chemical effects of electric current for periodic test 2.

SST

Q.1 How do the names of different Textiles? tell us about their histories.

Q.2 How did the development of cotton industries in Britain affect textile producers in India?

Q.3 Why did the Indian iron smelting industry decline in the 19th century?

Q.4 Why did James mill and Thomas Macaulay think that European education was essential in India?

Q.5 Why did Mahatma Gandhi want to teach children handicrafts?

Q.6 Distinction between ferrous and nonferrous Minerals.

Q.7 Why is conservation of minerals necessary?

Q.8 What is shifting cultivation what are its disadvantages?

Q.9 Distinction between primary activities and tertiary activities.

Q.10 Distinction between subsistence and intensive farming.

SANSKRIT

१) १ से १०० तक संस्कृत में गिनती लिखें।

२) ‘नीति नवनीतम्’ पाठ का भावार्थ लिखें।

३) ‘किम्’ शब्द रूप तीनो लिङगों में लिखें ।

४) संधि / विच्छेद करें-

यश: + बलम् = .............. तेष्वेव= .......... + ..................

कुलिशादपि = ............ + ....... सूर्योदय: = .......... + ..............

५) पदों से संस्कृत में वाक्य बनाएँ-

सक्रिया .................................

कुरीतीनाम् ..............................

मुखरम् .................................

प्रदेशस्य ..............................

६) ध्वनि प्रदूषण एवं प्लाष्टिक के दुष्प्रभाव पर एक अनुच्छेद लिखें।

CLASS IX

ENGLISH

Revise the taught lesson and work on the glossary of each taught chapters.

Revise tense, voice, narration, preposition.

Complete the story in 150 words:

One night after late night study when Rohan went to sleep he heard his grandmother sobbing, when he enterd her room he found him flipping the album of his family photograph. He went to his grandmother and asked her very lovingly what made her cry ……………………………………………………………………………………………………………………………………………………………………………………………………………..

Write 150 verbs in all its three forms .

You have had a heated conversation with your friends over a petty issues you realized it later. Write a diary entry.

MATHS

1. Simplify (+ )( - .

2. Factorize : 64

3. If the point (3,4) lies on the graph of the equation 3y= ax +7 , find the value of a.

4. In the given figure , lines XY and MN intersect at O. If = 90 and a:b = 2:3,find c.

5. In , AD is perpendicular bisector of BC. Show that is an isosceles triangle in which AB=AC.

6. The angles of a quadrilateral are in the ratio 3:5:9:13, find all the angles of the quadrilateral.

7. 15. The taxi fare in a city is as follows: For the first kilometer ,the fare is RS 8 and for the subsequent distance it is RS 5 per km. Taking the distance covered as x km and total fare as RS y, write a linear equation for this information, and draw its graph.

8. 16. Factorise : 27 +8 +125 - 90xyz

BIO

Revise the chapter diversity in living being and memorise it’s all question answers for periodic test 2.

CHEMISTRY

Q.1. Why is ice at 273 k more effective in cooling than water at the same temperature.

Q. 2. Which of the following will show tyndal effect ?

1. Salt solution

2. Milk

3. Copper sulphate solution

4. Starch solution

Q.3. Calculate the molar mass of the following substance

1. C2H4

2. HNO3

3. HCl

4. SO2

Q.4. What are the limitation of J.J Thomson model of the atom.

Q.5. If Z= 5 what would be the valency of the element? Also name the element.

PHYSICS

1. A certain household has consumed 250 units of energy during a month .Ho much energy is this in joules ?

2. A lamp consumes 1000 J of electrical energy in 10 s . What is its power ?

3. An electric bulb of 60 W is used for 6 hours per day .Calculate the ‘ units’ of energy consumed in one day by the bulb.

4. A racing car has a uniform acceleration of 4 m .What distance will it cover in 10 s after start ?

5. A bullet of mass 20 g is horizontally fired with a velocity 150 m from a pistol of mass 2 kg. What is the recoil velocity of the pistol?

SST

Q.1 What are the controls affecting the climate of India?

Q.2 What are jet streams and how do they affect the climate of India?

Q.3 Define monsoons what do you understand by break in monsoon.

Q.4 Give the characteristics and effects of the monsoon in india.

Q.5 Name different types of vegetation found in India and describe the vegetation of high altitudes.

Q.6 Why has India a rich heritage of flora and fauna?

Q.7 Why are rivers important for the country's economy?

Q.8 What is meant by deforestation?

Q.9 what is an election commission who appoints the chief election commissioner and how can he/she be removed?

Q.10 Who was Karl Marx?What was his theory of socialism?

CLASS X

HINDI

1. विगत दो वर्षों के सी बी एस सी बोर्ड परीक्षा प्रश्न पत्र का अभ्यास |

ENGLISH

Write a letter to the editor of a national daily drawing the attention of the concerned authorities and giving your suggestion about day light robberies and burglaries which have been increased in your city.

Write a letter to the editor of a national daily drawing the attention of the concerned authorities and giving your suggestions towards the problems of growing pollution in India.

You are Lakshmi/Lakshman, the head boy/head girl of the school. Draft a notice informing the students about the Interhouse debate competition in your school.

You purchased a laptop of Apple from a reputable shop of your locality, however, it stopped working. Write a letter of complaint to the firm.

You are the librarian of DAV Model School. Place an order of different books of self-help, children literature, novels and magazines to the M/S Prakash&Sons, Raipur.

MATHS

Q1 find the value of k, for which one root of the  quadratic equation kx^2- 14x+8=0 is 2.

Q 2. Write the value cot^2£- 1/sin^2&£

Q3. If nth term of an A.P. is (2n+1), what is the sum of its first three terms?

Q4 The HCF and LCM of  two numbers are 9 and 360 respectively. If one number is 45, find the other number.

Q5 Use Euclid's Division algorithm to find the HCF of 726 and 275.

BIOLOGY

Practice the diagrams of the chapters taught and revise for periodic test 2.

CHEMISTRY

Q.1 Explain why an aqoues solution of sodium sulphate is natural while an aqueous of sodium carbonate is basic in nature.

Q2 .When hydrogen gas is passed over heated copper oxide.copper and steam are formed.write the balanced chemical equation with physical state for this reaction and state what kind of chemical reaction is this.

Q.3 Name the gas evolved when sodium hydrogen carbonate is made to react with dilute hydrochloric acid.How will you test the gas.

Q4.zinc is a metal found in the middle of the activity series of metal .in nature it is found as a carbonate ore,Znco3 . Mention the steps carried out for its extraction out for its extraction from the ore.Support with equations.

Q5.Write the name of the following compounds,

    HCOOH, CH3COOH,CH3CH2OH

Q6.Explain the following reaction with one example for each giving relevant chemical equations

1. Hydrogenation reaction

2. Oxidation reaction

3. Substitution reaction

4. Saponification reaction

Q.7 Give an example of.

1. A metal that is liquid at room temperature

2. A non metal that is liquid at room temperature

3. An inert gas.

Q.8 an element belong to 4th period and group 17 of the periodic table find out

1. The number of valance electron.

2. It is a metal or non metal.

3. The name of element.

4. Formula of it's compound with hydrogen.

PHYSICS

1. A concave lens of focal length 15 cm forms an image 10 cm from the lens .How far is the object placed from the lens ?

2. Find the focal length of a lens of powr – 2.0 D .What type of lens is this ?

3. The far point of a myopic person is 80 cm in front of the eye . What is the nature and power of the lens required to correct the problem ?

4. An electric bulb is connected to a 220 V generator . The current is 0.50 A .What is the power of the bulb ?

5. What is the function of an earth wire ? Why is it necessary to earth metallic appliances ?

SST

Q.1 What are the various challenges faced by political parties?

Q.2 Suggest some reforms to strengthen parties so that they perform their functions well.

Q.3 Describe any five major functions of political parties.

Q.4 Democracy is better form of Government than any other forms of governments justify the statement.

Q.5 “Democracy accommodate social diversities”Support the statement with examples.

Q.6 List out the merits and demerits of democracy.

Q.7 Describe any five major problems faced by road transport in India.

Q.8 Discuss the significance of national highways and border roads.

Q.9 What are the different forms of power sharing in modern democracies? give an example of each of these.

Q.10 Describe any five features of Federal government.

CLASS XI

HINDI

i राजस्थान की रजत बूंदों पाठ का प्रश्न अभ्यास |

ii जन संचार पर आधारित प्रश्न –पत्रकारिता एवं संचार माध्यम के विषय में |

iii अर्थ ग्रहण संबंधी प्रश्न अभ्यास |

iv बोधात्मक प्रश्नों का अभ्यास |

v शिकायती पत्र का लेखन अभ्यास |

vi निबंध लेखन अभ्यास प्रारूप के साथ |

vii अपठित गद्यांश पद्यांश लेखन अभ्यास|

ENGLISH

Write a notice informing the students about an interhouse chess competition that is going to be held in the second week of January. Invite the necessary detail.

You are the Headboy of the school .Draft an attractive invitation to be sent to all the parents and guests for the Annual Prize Distribution Ceremony.

Write a letter to the editor of a national daily drawing the attention of the concerned authorities and giving your suggestion about day light robberies and burglaries which have been increased in your city.

Write a notice inviting participants from classes 9-12 form all the houses for a debate competition on the topic “Woman Empowerment is a reality.”

Revise the taught lesson and work on the glossary of each taught chapters.

PHYSICS

1. Draw stress – strain curve and define yield point or elastic limit .

2. State and explain young’s modulus , shear modulus and bulk modulus of elasticity.

3. State and prove pascal’s law .

4. State and explain equation of continuity .

5. State and explain Bernoulli’s principle.

CHEMISTRY

Q1. Why is ice at 273 k more effective in cooling than water at the same temperature.

Q. 2 Which of the following will show tyndal effect ?

1. Salt solution

2. Milk

3. Copper sulphate solution

4. Starch solution

Q.3 Calculate the molar mass of the following substance

1. C2H4

2. HNO3

3. HCl

4. SO2

Q.4 What are the limitation of J.J Thomson model of the atom.

Q.5 If Z= 5 what would be the valency of the element? Also name the element.

MATHS

1. If x = sec - tan and y= cosec + cot , then show that xy + x –y+1 = 0.

2. Prove that: = cot3x

3. Solve : =

4. Solve the inequation : -

Draw the graph of the solution on real number line .

6. If show that

7. 5. Find the square root of the complex number 3 +4i.

Convert the complex number into polar form..

8. How many arrangements can be made with the letters of the word MATHEMATICS? In how many of them vowels are together?

9. Find the term independent of x in the expansion of .

10. Prove by principle of mathematical induction that for all n N, is divisible by 11.

11. A survey of 500 television viewers produced the following informations;285 watch football,195 watch hockey,115 watch basketball,45 watch football and basketball,70 watch football and hockey,50 watch hockey and basketball,50 donot watch any of the three games. How many watch all the three games? How many watch exactly one of the three games?

12. Prove that : =

13. Solve the following system of inequalities graphically:

x+2y10, x+y1, x-y0, x0 , y0

BIOLOGY

Memorise question answers from unit plant physiology and prepare for periodic test 2.

COMPUTER

1. Predict the output of following code?

(a)employ=(‘Rohan’,10000,23,’sales’)

Len(employ)

(b)tp1=(“Karan”,”Zubin”,”Zara”,”Ana”)

Min(tp1)

2. Write the short notes on dictionary function and methods with example?

(a)Update()(b)get()

3. Why is a dictionary termed as an unordered collection of objects? What types of object can be used as keys in dictionary?

4. Why are dictionary called mutable type?

5. Predict the output of following code

>>>vowels=(‘a’,’e’,’I’,’o’,’u’)

>>>vowels[-1]

6. What are list slices? What for can you use them?

7. Given a list L1=[3,4.5,12,25.7,[2,1,0,5],88]

(a)Which list slice will return[12,25.7,[2,1,0,5]]

(b)Which expression will return [2,1,0,5]

(c)Which list slice will return[4.5,25.7,88]

8. Write two tuple functions and methods? Give examples.

CLASS XII

HINDI

1. विगत दो वर्षों के सी बी एस सी बोर्ड परीक्षा प्रश्न पत्र का अभ्यास |

ENGLISH

1. You bought a Sony Bravia 64” LCD TV from M/S Lakshmi &sons. Soon it developed certain problems. Write a letter of complaint demanding repairing or the replacement of the same.

2. Your younger sister is going to be married. Write a formal invitation on behalf of your parents for the wedding ceremony.

3. Delhi Public School Rohtak, Haryana needs four post graduate teachers for the school. As the chairman of the school draft a classified ad in 50 words.

4. You are the Head boy/Head girl of the school .Draft an attractive invitation to be sent to all the parents and guests for the Annual function.

5. Write a notice inviting participants from classes 9-12 form all the houses for an Inter house Painting competition based on the theme of “Pollution free Environment.”

6. You are the General Manager of a leading Industrial company. You need a charted accountant for your office. Draft an ad to be published in ‘Situation Vacant’ column of classified ad. Invent the necessary detail.

7. ‘Smartphone’s are not good for students.’ Write a debate in favour or against the topic.

8. Write a letter to the editor of a national daily drawing the attention of the concerned authorities and giving your suggestion about growing indifferent attitude of young generation towards the growing parents and the rapidly growing trend of old age shelter homes in your city.

9. Revise the taught lesson and work on the glossary of each taught chapters.

10. Go through the novel prescribed in syllabus.

PHYSICS

1. State Gauss’s law in electrostatics .Use this law to derive the expression for electric field due to a uniformly charged infinite thin plane sheet .

2. Show that the energy stored in a parallel plate capacitor is C .

3. Derive an expression for drift velocity of electrons in a good conductor in terms of relaxation time of electrons.

4. Deirve the condition of balance of a wheatstone’sbridge .

5. Define relaxation time of electrons in a conductor.Explainhow it varies with increase of temperature .State the relation between resistivity and relaxation time.

6. Find an expression for the torque on a rectangular coil of area A carrying current I and placed in a magnetic field B at an angle ф to the direction of the magnetic field.

7. Explain with the help of a labelled diagram the construction ,principle and working of a cyclotron.

8. The horizontal component of earth’s magnetic field at a given place is 0.4 X Wb/ and angle of dip is 30 °.calculate the value of vertical component and total intensity of earth’s magnetic field.

9. State and explain angle of dip .angle of declination and horizontal component of earth’s magnetic field by drawing suitable diagram.

10. Derive lens maker’s formula for a double convex lens.

11. Draw a ray diagram to show refraction of a ray of monochrometic light passing through a g lass prism .Deduce the expression for the refractive index of the glass prism in terms of angle of prism and angle of minimum deviation.

12. Using a suitable diagram ,find an expression for thin lens formula.

13. Name the electromagnetic wave having frequency 6 X Hz in free space and find its wavelength. Write its two applications .

14. Find an expression for the maximum torque acting on an electric dipole when it is placed in a uniform electric field .Determine the maximum torque acting on an electric dipole of electric dipole moment 50 Coulomb metre placed in an electric field of 100 N/C .

15. State Huygen’s principle .With the help of a suitable diagram prove Snell’s law of refraction using Huygen’s wave theory.

16. (a) With the help of a labelled diagram, describe briefly the underlying principle and working of a step- up transformer .

(b) Write any two sources of energy loss in a transformer.

CHEMISTRY

Q1. The compound CuCl , formula mass= 99 g/ mol

has FCC structure like ZnS it's density is 3.4 cm-3.

What is the length of the edge of unit cell.

Explain why a solution of chloroform and acetone show negative deviations from Raoults law.

Q2.Account for the following .

1. Rusting of iron is quicker in saline water than in ordinary water.

2. Blocks of magnesium are straped to the steel hubs of ocean going ships.

Q3 Define the following terms.

1. Pseudo first order reaction.

2. Half life period of reaction.

BIOLOGY

Memorise minimum 5 sample papers and revise for 2nd pre board.

MATHS

1. For what value of k, the matrix is skew symmetric?

2. Find the identity element in the set of all positive rational numbers for the operation defined by ab = for all a, b .

3. Find a vector in the direction of vector which has magnitude 9 units.

4. Find the principal value of

5. Form differential equation of family of curves

y = a cos(x + b) where a and b are arbitrary constants.

6. If A = , find k so that kA + 2 I = O

7. Show that the function f given by f(x)=3 + 4x , x

is strictly increasing on R.

8. If ey (x + 1) = 1, show that = ey

9. Write the sum of intercepts cut off by the plane .5 =0

10. A die, whose faces are marked 1,2,3 in red and 4,5,6 in green , is tossed. Let A be the event “number obtained is even” and B be the event “number obtained is red”. Are A and B independent events.

11. Evaluate ∫

12. Find the value of k if the function defined by

f(x) = is continuous at x.

13. Using the properties of determinants prove the following:

= 2(x + y + z)3

14. If A = R and B = R . Consider the function f : A B defined by f(x) = , for all x A . Then show that f is bijective.

15. If y = (tan -1, show that y2 +2x y1 = 2

16. Find the intervals in which the function

f(x) = + , x is i) increasing ii) decreasing.

17. Evaluate∫

OR

Evaluate dx

18. Solve the differential Equation:

OR

Solve the differential equation

19. Find the value of ,if four points with position vectors

and are coplanar .

20. Find the shortest distance between the lines whose vector equations are

++ and

++

COMPUTER

1. Write the SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii), which are based on the tables.

DVD

DCODEDTITLEDTYPE

F101Henry MartinFolk

C102DhrupadClassical

C101The PlanetsClassical

F102Universal SoldierFolk

R102A day in lifeRock

MEMBER

MIDNAMEDCODEISSUEDATE

101AGAM SINGHR1022017-11-30

103ARTH JOSEPHF1022016-12-13

102NISHA HANSC1012017-07-24

(i)To display all details from table MEMBER in descending order of ISSUEDATE.

(ii)To display the DCODE and DTITLE of all Folk Type DVDs from table DVD.

(iii)To display the DTYPE and number of DVDs in each DTYPE from table DVD.

(iv)To display all NAME and ISSUEDATE of those members from the table MEMBER who have DVDs issued(i.e.ISSUEDATE) in the year 2017.

(v)SELECT MIN(ISSUEDATE) FROM MEMBER;

(vi)SELECT DISTINCT DTYPE FROM DVD;

(vii)SELECT D.CODE,NAME,DTITLE FROM DVD D,MEMBER M WHERE D.DCODE=M.DCODE;

(VIII)SELECT DTITLE FROM DVD WHERE DTYPE NOT IN (“Folk”,”Classical”);