BHAI PARMANAND VIDYA MANDIR
HOLIDAY HOMEWORK
CLASS X
Dear children
Its time to stand the books up
In rows upon the shelves,
and pack the charts and posters
in neat piles by themselves,
collect the pens and pencils
and put the ink away,
for school time is now over
and every day is for play
so to keep you happily occupied,
we have planned some fun filled and exciting activities for you
English
1. India is called ‘a sunshine country’. Parts of our country enjoy at least 250 sunny days
every year. Write an article reflecting how one can make best use of solar
power-an abundant, Eco friendly and inexhaustible source of energy.
2. You recently visited one of your favourite places in India, Goa. You
enjoyed various sea sports during your stay there. Using ideas from your
M.C.B unit ‘Travel and Tourism’ write an article on your visit to Goa.
3. ‘Serving nation is not a sacrifice but a privilege’ but now a days people are forgetting the
importance of unity, sacrifice and national integration. Write a letter to the editor of the Time
of India drawing the attention of the people towards the same using ideas from the M.C.B
unit National Integration.
4. Read the novel ‘The story of my life’ (ch.15-23) and answer the following questions in
120-150 words:
a. In what ways did the wright-Humason school for the deaf contribute to the education of
Helen?
b. Why was Helen sent to Cambridge school? What difficulties did she face at the Cambridge
school?
c. Write the role of Gilman and Mr.Keith.
d. What problems did Helen face in the second year at the Gilman school?
Social Science
1. Complete the assignments of chapter 6 of Geography and Chapter 4 of Economics.
2. Revise and learn the chapters coming in Mock Test.
3. Map Practice:
a. Types of minerals
b. Oil fields
c. Software Technology parks
d. Iron and steel industry
e. Cotton textile industry
f. Sugar and jute industry
g. Major airports and seaports
Hindi
Maths
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*Solve all the questions of assignment of probability from the assignment booklet.
*Solve the following questions:
Draw a line segment of a length 8.6 cm and divide it in the ratio 5 : 8. Measure the two parts and
verify it by actual calculation.
By geometrical construction, is it possible to divide a line segment in the ratio 3+√2 : 3 -√2.
Divide a line segment of a length 6Cm into 2:3 internally.
By geometrical construction, is it possible to divide a line segment in the ratio √3 : 1/ √3.
Draw a triangle ABC in which AB= 5Cm, BC=6Cm and ABC = 60. Then construct a triangle
whose sides are 5/7 times the corresponding sides of ABC.
Draw an isosceles triangle ABC in which AB = AC = 6Cm and BC = 5 Cm. Construct a triangle
PQR similar to ABC, in which PQ = 8Cm. Also justify the construction.
Draw two tangents at the extremities of diameter AB of a circle of radius 2.5 Cm. Are these
tangents parallel? Give reasons for your answers.
A vessel is in the form of a hollow hemisphere mounted by a hollow
cylinder. The diameter of the hemisphere is 14 cm and the total height of the
vessel is 13 cm find the inner surface area of the vessel.
A solid cylinder of base radius 7cm and height 24 cm is surmounted by a
cone of same base radius and same vertical height. A hemisphere surmounts
the cylinder at other end. Find the surface area of the solid.
From a rectangular solid of metal 42x30x20cm, a conical cavity of base radius 14cm and ht
20cm is drilled out find the surface area of the remaining solid.
The interior of a building is in the form of a cylinder of base radius 12m and height 3.5 m
surmounted by a cone of equal base and slant height 13 m. Find the internal CSA of the
building.
An exhibition tent is in the form of cylinder surmounted by a cone. The height of the tent above
the ground is 85m and height of the cylindrical part is 50m, if the diameter of the base is 168 m,
find the quantity of canvas required to make the tent. Allow 20% extra for fold and for stitching.
Give your answer to the nearest meter square.
Determine the ratio of the volume of a cube to that of a sphere which will exactly fit inside the
cube.
A right triangle with sides 3cm and 4cm is revolved around its
hypotenuse. Find the volume and the surface area of the double cone
generated.
15. A conical vessel of radius 6cm and height 8cm is completely filled with water a sphere is
lowered into the water and its size is such that when it touches the sides, it is immersed. What
fraction of water overflows?
16. A friction clutch is in the form of a frustum of a cone,the diameter of the ends being 32cm and
20cm and length is 8cm.Find its bearing surface and volume.
17. A solid metal cone with radius of base 12cm and height 24 cm, is melted to form spherical solid
balls of diameter 6cm each. Find the number of balls formed.
18. A solid right cone of diameter 14cm and height 8cm is melted to form a hollow sphere. If the
external diameter of the sphere is 10 cm find the internal diameter of the sphere.
19. A shuttle cock used for playing badminton has the shape of a frustum of a cone mounted on a
hemisphere.The external diameters are 5cm and 2cm,ht. Of entire cock is 7cm.Find its external
surface area.
20. Marbles of diameter 1.4cm are dropped into a beaker containing some water and are fully
submerged, the diameter of the beaker is 7cm. Find how many marbles have been dropped in it,
if the water rises by 5.6 cm.
21. A farmer connects pipe of internal diameter 20cm form a canal into a cylindrical tank in his
field, which is 10m in diameter and 2m deep. If water flows through the pipe at the rate of
3kmph, in how much time will the tank be filled?
22. Determine the volume, CSA and TSA of the frustum of a cone, if the diameter of the ends are
6cm and 4cm and height is 3.6cm.
23. A tent is made in the form of a conic frustum surmounted by a cone. The diameters of the base
and top of the frustum is 14m and 7m its height is 8m. The height of the tent is 12m. Find the
quantity of canvas required.
24. Two unbiased coins are tossed simultaneously.Find the probability of getting
(i)
Two heads (ii) one head (iii) at most one head (iv) at least one head (v) no head
25. A letter is chosen at random from the letters of the word ASSASSINATION.Find the
probability that the letter chosen is a (i) vowel (ii) consonant
26. A number x is selected from the numbers 1,2,3 and then a second number y is randomly
selected from the numbers 1,4,9.What is the probability that the product xy of the two numbers
will be less than 9.
ANSWERS 8)572cm2 9)609∏cm2 11) 754.14m2 12) 60509m213) 6:∏ 14)30.14cm3,52.75cm2
2
15) 3/8 (16) 817.14cm2,4324.57cm317)32 balls 19) 74.26cm
20) 150
(21)100min.23)346.5cm2(24) ¼,1/2,3/4,3/4,1/4 (25) 6/13, 7/13 (26) 5/9
Science
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All the holiday homework to be done in a separate practice register
Chemistry: Carbon and its Compounds
1. Draw the electron do structure of O2 and N2 molecules.
2. A test – tube contains a brown coloured liquid in it. The colour of the liquid remains unchanged when
methane is passed through it but disappears when ethane is passed. Suggest the name of the compound giving
brown colour to the liquid.
3. Draw the structure of chloro butane.
4. What happens when ethanol is oxidized with alkaline potassium permanganate (or acidified potassium
dichromate)? Write the equation of the reaction involved.
5. Name the product other than water formed on burning of ethanol in air.
6. An organic compound ‘A’ is a constituent of antifreeze. The compound on heating with oxygen forms
another compound ‘B’ which has a molecular formula C2H4O2. Identify the compound ‘A’ and ‘B’. Write the
chemical equation of the reaction to form the compound ‘B’.
7. Give two tests to demonstrate that acetic acid (CH3COOH) is acidic in nature.
8. What is detergent? Explain giving reasons: Detergents made up of molecules, in which branching is
minimum, are prepared these days.
9. What type of compounds show additional reactions? Explain with an example.
10. Draw the structural formulae of all the possible isomers of pentane
11. Explain the cleaning action of soaps.
12. (i) Describe with chemical equation how Ethanoic acid may be obtained from (a) ethanol and (b) methanol.
13. (i) Why is ethanol used as a fuel?
(ii) Why is the conversion of ethanol into Ethanoic acid an oxidation reaction?
(iii) Why, methanol is much more dangerous to drink than ethanol?
Periodic Classification of Elements
1. Arrange the following is descending atomic size Na, Mg, K
2. Give the name and electronic configuration of second alkali metal?
3. What is the similarity in the electronic configuration of Mg, Ca and Sr?
4. Which is bigger in size Na, Na+
5. Name three elements which behave as metalloids?
6. Alkali metals form positive ions why?
7. Why non-metals are called electro negative elements?
8. How were the positions of different isotopes decided in the modern periodic table?
9. Hydrogen is regarded as a rogue element in the periodic table. Discuss.
10. Explain Dobereiner’s Law of triads along with an example
11. Calcium is an element with Z = 20
(a) Is it a metal or a non-metal?
(b) Will its size be more or smaller than that of potassium?
(c) Write the formula of its chloride
12. Answer these questions
(a) Name the elements present in the third period and classify them into metals and nonmetals.
(b) On which side of the table do you find the metals?
(c) On which side of the table do you find the non-metals?
13. Table is a part of periodic table
H
He
Li
Be
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
Use this table and explain why (a) Li and Na are considered as active metals
(b) Atomic size of Mg is less than that of Na(c) Fluorine is more reactive than chlorine.
14. Write two major shortcomings of Mendeleev’s periodic table? How have these been removed in the
modern periodic table?
15. Define atomic radius of an element. How does it vary along the period and group?
PHYSICS
Light: Reflection and Refraction
1. A student has three concave mirrors A, B, C of focal lengths 20 cm, 15 cm and 10 cm respectively. For each
concave mirror he performs the experiment of image formation for three values of object distance of 30 cm, 10
cm and 20 cm.
Giving reason answer the following:
(a) For the three object distances identify the mirror which will form an image equal in size to that of object.
Find at least one value of object distance.
(b) Out of the three mirror identify the mirror which would be preferred to be used for shaving purpose.
(c) For the mirror B draw ray diagram for image formation for any two given values of object distance.
2. A small candle 2.5cm in size is placed at 27 cm in front of concave mirror of radius of curvature 36 cm. If
the candle is moved close to the mirror. How will the screen has to be moved?
3. Magnification produced by concave mirror is + 4 . Write about the image given by this statement?
4. (a) An object is placed at the following distances from a convex lens of focal length 15 cm
(i) 35 cm (ii) 30 cm (iii) 20 cm (iv) 10 cm
Which position of the object will produce (a) A magnified, real image (b) A magnified, virtual image
(c) A diminished real image (d) Real and an image of same size as the object
5. With ray diagram show that the angle of incidence is equal to the angle of reflection when a ray incident on
concave mirror.
6. What happens when a ray of light is incident normally on a rectangular glass slab?
7. What happen when ray of light passes from one medium to another having same refractive indices.
8. What is lateral displacement? State two factors on which it depends?
9. When sunlight is concentrated at a paper at the principal focus of a convex lens, what happen to the paper?
10. What are the differences between the virtual image formed by plane, concave and convex mirror.
11. Speed of light in transparent medium is 0.7 times that of its speed In vacuum . Calculate the absolute
refractive index of the medium.
12. Which kind of mirrors are used in the headlights of a motor- car and why?
13. "A concave mirror of focal length ‘f ’ can form a magnified, erect as well as an inverted image of an object
placed in front of it." Justify this statement stating the position of the object with respect to the mirror in each
case for obtaining these images.
Human Eye and the Colourful World
Q. 1. What is meant by power of accommodation of the eye?
Q. 2. A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the
corrective lens used to restore proper vision?
Q. 3. What is the far point and near point of the human eye with normal vision?
Q. 4. A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the
child is suffering from? How can it be corrected?
Q. 5. The human eye can focus objects at different distance by adjusting the focal length of the eye lens. This is
due to
(a) Presbyopia b) accommodation (c) near-sightedness (d) far-sightedness
Q 6. The human eye forms the image of an object at its
(a) Cornea (b) iris (c) pupil (d) retina
Q.7. The least distance of distinct vision for a young adult with normal vision is about
(a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m
Q. 8. The change in focal length of an eye lens is caused by the action of the
(a) Pupil (b) retina (c) ciliary muscles. (d) iris.
Q. 9. A person needs a lens of power 5.5 D for correcting his distant vision. For correcting his near vision he
needs a lens of power + 1.5 D. What is the focal length of the lens required for correcting (i) distant vision, and
(ii) near vision?
Q.10. The far point of a myopic the person is 80 cm in front of the eye. What is the nature and power of the
lens required to correct the problem?
Q11. The near point of a hypermetropic eye is 1m. What is the power of the lens required to correct this defect?
Assume that the near point of the normal eye is 25 cm.
Q12. Why is a normal eye not able to see clearly the objects placed closer than 25 cm ?
Q13. Why do stars twinkle?
Q14. Explain why the planets do not twinkle.
Q.15. why does the Sun appear reddish early in the morning?
Q16. Why does the sky appear dark instead of blue to an astronaut?
BIOLOGY
How Do Organisms Reproduce
Q.1) What is the role of placenta?
Q.2) How does binary fission different from multiple fission?
Q.3) What is fertilization? Name the site of fertilization in humans.
Q.4) Differentiate b/w self pollination and cross pollination?
Q.5) define STD. Name any three STD’s. Which leads to weakening of immune system?
Q.6) How does embryo get nourishment?
Q.7) Define puberty. Mention any 2 changes occur in male & female during puberty.
Q.8) What is reproduction? Mention the importance of DNA copying in reproduction.
Q.9) In human body what is the role of (a) seminal vesicles and (b) prostate gland.
Q.10) Draw a labeled diagram showing binary fission in Amoeba.
Q.11) Why are testes extra abdominal in location?
Q.13) Define the terms unisexual and bisexual giving one example of each.
Q.13) Why is vegetative propagation practiced in some types of plants?
Q.14) (a) when does ovulation occur during the menstrual cycle in a normal healthy woman?(b)
What happens if egg is not fertilized?
Q.15) Draw a labeled diagram to show the reproductive system of a human female.
Q.16) Define contraception. Write two methods of it along with their explanation. Also write the
affect of them on human health.
Heredity & evolution
Q.1) What is genetic drift?
Q.2) Why did Mendel’s select garden pea plant for his experiment on heredity. Write two
reasons.
Q.3) Name an organism in which sex determination is regulated by environmentally factors?
Q.4) Define variation in relation to a species? Why are variations beneficial to the species?
Q.5) Why are traits acquired during life time in an individual are not inherited?
Q.6) what are fossils. Describe the importance of fossils in deciding the evolutionary relationship
between the organisms?
Q.7) Differentiate between homologous & analogous organs?
Q.8) With suitable example, highlight how temperature has an effect on sex determination in the
animal world?
Q.9) Describe briefly four ways in which individuals with a particular trait may increase in
population.
Q.10) Name the organism Mendel used for his experiments. Explain about F1 and F2 progeny
obtained by Mendel when he breads the tall and the short varieties of the organism he
experimented with.
Q.11) Why are sexually reproducing organisms capable of showing the heredity features
more?
Q.12) who proposed the “Theory of Natural Selection”? What are vestigial organs? Give some
examples of human vestigial organs.
Q.13) Differentiate between inherited & acquired characters. Give one example of each
type.
Q.14) What are fossils? Give two uses of fossils. How does the study of fossils provide evidence
in favour of organic evolution?
Q.15) (a) What is a gene? (b) Where are genes located? (c) What is the nature of gene?
Q.16) (a) What is genetics?
(b) Give the common name of the plant on which Mendel performed his experiments?
(c) What for did Mendel use the term factors and what are these factors called now?
(d) What are genes? Where are the genes located?
Q.17) (a) What are chromosomes? Where are they seated?
(b) What is a sex chromosome?
(c ) Describe how the sex of the offspring is determined in the zygote in human beings?
SANSKRIT
आवश्यक -निर्दे श- 1 सारा कायय संस्कृत व्याकरण कापी में करिा हैं।
2 मात्रिक गलनतयां िही होिी चाहहए , ध्याि रखें ।
3 गह
ृ कायय में हर्दए गए कायय (हर छाि) के उर्दाहरण तथा वाक्यसंयोजि स्वनिर्मयत होिे चाहहए ।
कायय -1- (10-10) व्याकरण पस्
ु तक में हर्दये गये चचि वणयि एवं पि अभ्यास पस्ु स्तका में करें ।
2 स्वर संचि के यण ् , अयाहर्द , पूवरू
य प , व्यंजि संचि तथा ववसगय सस्धि के द्ववतीय सिीय सभी
नियमों के उर्दाहरण सहहत 50 शब्र्दों का निमायण करें ।
3 अव्ययों का प्रयोग करते हुए 20 वाक्य रचिा करें ।
4 बहुव्रीहह , अव्ययी भाव व द्वधर्द समास के 50 उर्दाहरण र्लखखए।
5 मखणका पस्
ु तक में से द्ववतीय सि के गद्यात्मक पाठों के आिार पर छहः घटिाक्रम बिाएं।
6 ककम ् शब्र्द के रुप तीिों र्लंगों में र्लखें।
ववशेष - बहुववकल्पीय प्रश्िोत्तरी उपरोक्त हर्दए गए कायय के आिार पर ही होगी।
हर कायय को गंभीरता से करें ।
ववद्यालय खल
ु ते ही पहले हर्दि ही कायय जमा करवािा आवश्यक हैं।
Note: Home work of all the subjects should be done on A4- size sheet.
Get it Spiral bound and submit it to the class teacher.