HOLIDAY HOME WORK
Class: X
Subject: English
Questions
1.Using ideas from the unit Environment you decide to write an article on the topic Plastic bags should be
banned. Write an article about 100- 125 words in a newspaper.
2. Write the character of Mrs. Hutton.
OR
How did Helen overcome her helplessness? Explain.
3.Complete the following fill in the blanks.
While peeling the sweetlime and oranges (a)------------ careful so that the segments are not mashed. The
lettuce leaves are (b)----------------- into pieces. They are kept in the ice-cold water(c) --------- ten minutes.
a. i) was
(II) is
III) be
IV) will
b. i) broken II) broke III) breaks IV) broke
c. i) with
II) for
iii) on
iv) during
4. The noble Brutus hath told you
Caesar was ambitious.
If it were so it was a grevious fault,
And greviously hath Caesar answered it.
a Who is the speaker? Who are you?
b How did Caesar pay for being ambitious?
c What argument did the speaker give to show that Brutus was wrong in his judgement of Caesar?
5 Write the character sketch of Miss Sullivan in 150-200 words.
6. The poem snake reminds us of the fact that animals to have right to life we have no right to deny them.
Describe how man should co- exist with nature and its creatures for ecological balance.
Subject: II Lang
Telugu
I.ఈ ం
ా ాలను వ ం
1.అ
ర
ాయం .
లన – ఆవశ కత
2.మ తృ షల
దన
3.ప ా వరణ ప ర ణ
4.స చ భర
II. ం అలం ా ాలను
హరణం ా వ ం
ాయం .
1.ఉపమ
2.అ శ
3.అరంతర
స
4.కమ
III. ం సంధులను సూ లను ా ి ,ఉ హరణలను ాయం .
1.గసడద ా ేశ సం
త సం
2.ఆ
3.
ర క ట ార సం
4.ర ాగమ సం
Hindi
Subject: Maths
Directions: Given activities can perform in Mathematics activities book.
Activity 1: Obtain the Solution of a Quadratic equation ( x 2  4 x  60 )by completing the square
geometrically.
Activity 2: Identify Arithmetic Progressions in some given lists of numbers (patterns).
Activity 3: Find the sum of first n Natural numbers.
Activity 4: Verify that lengths of tangents to a circle from some external point are equal.
Activity 5: Determine experimental probability of a head (or tail) by tossing a coin 1000 times and compare it
with its theoretical probability.
Activity 6: Verify the distance formula by graphical method.
Activity 7: Obtain formula for area of a circle experimentally.
Activity 8: Obtain formula for the Surface Area of a circus tent.
Subject: Science
Physics
ANSWER THE FOLLOWING
1. What is presbyopia? Write two causes of this defect. How can it be corrected?
2. An object is placed perpendicular to the principal axis of a convex lens of focal
length 20 cm. The distance of the object from the lens is 30 cm. Find (i) the position
(ii) magnification (iii) nature of the image formed.
3. What is the velocity of light in water if 12m deep tank appears to be only
9 m deep ? Given velocity of light in air to be 3 x 108 m/s. (refractive index = Real
depth / Apparent depth).
4. An object d 4.0cm in size is placed 25.0 cm in point of a concave mirror of focal
length 15.0 cm. At what distance from the mirror should a screen be placed in order
to obtain a sharp image? Find the nature and the size of the image formed.
5. An object is placed 15 cm from a convex mirror of radius of curvature 60 cm. Find
the position of image and its magnification?
6. A man can read the number of a distant bus clearly but he finds difficulty in reading a
book.
(i)
From which defect of the eye he is suffering from?
(ii) What type of spectacle lens should he use to correct this defect?
7. It is desired to obtain an erect image of an object using a concave mirror of focal
length 20 cm.
(i)
What should be the range of the distance of the object from the mirror?
(ii) Will the image be bigger or smaller than the object?
(iii) Draw a ray diagram to show the image formation in this case.
8. The far point of a myopic person is 150 cm in front of the eye. Calculate the focal
length and the power of the lens required to enable him to the distant objects clearly.
9. The near point of a hypermetropic eye is 1 m. What is the power of the lens required
to correct this defect? Assume the near point of thwe normal eye is 25 cm.
10. A convex lens of focal length 10cm is placed at a distance of 12 cm from a wall. How
far from the lens should an object be placed so as to form its real image on the wall?
11. The far point of a myopic person is 80 cm in front of the eye. What is this the nature
and power of the lens required to correct problem?
12. An object is placed at a distance of 50 cm from a concave lens of focal length 20 cm .
ind the nature and position of the image formed?
CHEMISTRY
Answer the following:
a) Define Scum. b) Give the names of the functional groups –CHO and –COOH.
2. Answer the following
a) What is Vinegar? b) What substance should be oxidized to prepare acetic acid?
c) How does carbon attain a stable electronic configuration?
3. a). What change will you observe when soap is tested with litmus paper (both red and blue).
b). Write the combustion reaction of ethanol.
c). Why is CNG considered as environmental friendly fuel?
d). Why are carbon and its compounds used as fuels for most applications?
4. Answer the following:
a) How does the metallic character change along the period?
b). A mixture of oxygen and ethyne is burnt for welding. Explain why a mixture of ethyne
and air is not used.
c). an element of group 14 has the atomic number 14. Examine whether the element will exhibit
metallic or non-metallic properties.
d). Explain salting out of soap.
5. Which of the following substance is used to denature ethanol?
a) Methanol
b) Pyridine
c) Copper sulphate
d) All of these.
6. Which of the following compounds contains the carboxylic group?
a) CH3COOH
b) CH3OH
c) CH3CHO
d) CH3COCH3
7. Brisk effervescence produced when a pinch of sodium carbonate is added to CH3COOH is
due to the formation of
a) H2 gas
b) CO2 gas
c) CO gas
d) CH4 gas
8. Which of the following salt when dissolved in water produces hard water?
a) Calcium sulphate b) Magnesium carbonate c) Calcium chloride d) Any of the above
9. Define Homologous Series.
10. Define hydrogenation and its applications in industries.
11. Answer the following:
a) What were the limitations of Newland’s law of Octaves?
b) How were the positions of different isotopes decided in the modern periodic table?
c) State Mendeleev’s periodic law.
d) What is called electro negativity?
12. Answer the following
a) Hydrogen can be placed in Group 1 and Group 7 of periodic table. Why?
b) Name an element with five electrons in its outer most shell.
c) What is the common feature between Helium and Neon gases?
13. Answer the following
a) Why micelle formation does take place when soap is added to water?
b). i) Name the compound CH3COOH and mention its functional group.
ii) Give a chemical test to identify this compound.
c). Give advantages of synthetic detergents over soaps.
14. Answer the following
a) Why graphite has high melting points?
b).List out the differences between ionic and covalent compounds.
15. Draw the structures for the following compounds.
i) Ethanoic acid
ii) Butanone iii) Pentane iv) Hexanal
16. Define (photo) halogenations reaction of alkanes.
17. Diamond is not a good conductor of electricity because
a) It is very hard
b) It is water soluble
c) Its structure is compact
d) It has no free electrons to conduct electric current
18. Which of the following formulae represents a saturated hydrocarbon?
a) CnH2n+2
b) CnH2n+1
c) CnH2n
d) CnH2n-2
19. Which of the following is propanone?
a) CH3OH b) CH3CH2COOH c) CH3COCH3
d) CH3COOCH3
20. Find the IUPAC name.
a) Propanoic acid b) Ethyl alcohol
c) Formic acid
d) Acetaldehyde
21. The reaction between carboxylic acid and ethanol in the presence of sulphuric acid is known as
a) Saponification
b) Hydrolysis
c) Esterification
d) Decarboxylation
22. Write the next homologue of each of the following:
(i)C2H4 (ii) C4H6
23. What are covalent compounds? Why are they different from ionic compounds? List their three
characteristic properties.
24. An element ‘M’ with electronic configuration (2, 8, 2) combines separately with (N03)–, (S04)2and (P04)3- radicals. Write the formula of the three compounds so formed. To which group and
period of the Modem Periodic Table does the elements ‘M’ belong? Will ‘M’ form covalent or ionic
compounds? Give reason to justify your answer.
25. (a) Give a chemical test to distinguish between saturated and unsaturated hydrocarbon.
(b) Name the products formed when ethane burns in air. Write the balanced chemical equation
for the reaction showing the types of energies liberated.
(c) Why is reaction between methane and chlorine in the presence of sunlight considered a
substitution reaction?
26. Which of the following sets of materials can be used for conducting a saponification reaction
for the preparation of soap?
(a) Ca(OH)2 and neem oil
(b) NaOH and neem oil
(c) NaOH and mineral oil
(d) Ca(OH)2 and mineral oil
27. Consider the following comments about saponification reactions:
(I) Heat is evolved in these reactions.
(II) For quick precipitation of soap sodium chloride is added to the reaction mixture.
(III) Saponification reactions are special kind of neutralization reactions.
(IV) Soaps are basic salts of long chain fatty acids.
The correct comments are:
(a) I, II and III
(b) II, III and IV
(c) I, II and IV
(d) Only 1 and IV
28. What do you observe when you drop a few drops of acetic acid a test tube containing:
1. Phenolphthalein 2.distilled water 3.universal indicator 4.sodium hydrogen carbonate powder
29. What is an oxidizing agent? What happens when an oxidizing agent is added to propanol?
Explain with the help of a chemical equation.
30. Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2
and 13 respectively. Compare their following characteristics in tabular form:
(a) Number of electrons in their atoms (b) Size of their atoms (c) Their tendencies to lose electrons
(d) The formula of their oxides (e) Their metallic character (f) The formula of their chlorides 3
31. Name any two elements of group one and write their electronic configurations. What
similarity do you observe in their electronic configurations? Write the formula of oxide of any of
the aforesaid element.
32. Select saturated hydrocarbons from the following:
C3H6; C5H10; C4H10; C6H14; C2H4
33. Write the number of vertical columns in the modem periodic table. What are these columns
called?
34. State the meaning of functional group in a carbon compound. Write the functional group
present in
(i) ethanol and (ii) ethanoic acid and also draw their structures.
35. Write the name and general formula of a chain of hydrocarbons in which an addition reaction
with hydrogen can take place. Stating the essential conditions required for an addition reaction to
occur write the chemical equation giving the name of the reactant and the product of such a
reaction.
36. Based on the group valency of elements state the formula for the following giving justification
for each:(i) Oxides of 1st group elements,
(ii) Halides of the elements of group 13, and
(iii) Compounds formed when an element of group 2 combines with an element of group 16.
37. a) Define the following terms: (i) Valency (ii) Atomic size
(b) How do the valency and the atomic size of the elements vary while going from left to right
along a period in the modem periodic table?
38. State the reason why carbon can neither form C4+ cations nor C4- anions, but forms covalent
compounds. Also state reasons to explain why covalent compounds:
(a) are bad conductors of electricity?
(b) Have low melting and boiling points?
39. The position of three elements A, B and C in the Periodic Table are shown below:
Giving reasons, explain the following: (a) Element A is a non-metal.
(b) Atom of element C has a larger size than atom of element A.
(c) Element B has a valency of
1.
40. You add about 2 mL of acetic acid to a test tube containing an equal amount of distilled water
and leave the test tube to settle after shaking its contents, then after about 5 minutes what will you
observe in the test tube:
(A) A white precipitate settling at its bottom
(B) A clear colour less solution,
(C) A layer of water over the layer of acetic acid
(D) A layer of acetic acid over the layer of
water.
41. In order to study saponification reaction we first prepare 20% solution of sodium hydroxide. If
we record the temperature of this solution just after adding sodium hydroxide flakes to water and
also test its nature using litmus, it may be concluded that the process of making this solution is:
(A) Exothermic and the solution is alkaline.
(B) Endothermic and the solution is alkaline.
(C) Endothermic and the solution is acidic.
(D) Exothermic and the solution is acidic.
42. Write the number of horizontal rows in the modern periodic table. What are these rows called?
43. Consider two elements ‘A’ (Atomic number 17) and ‘B’ (Atomic number 19) :
(i) Write the positions of these elements in the modem periodic table giving justification.
(ii) Write the formula of the compound formed when ‘A’ combines with ‘B’.
(iii) Draw the electron dot structure of the compound and state the nature of the bond formed
between the two elements.
44. Write any one difference in the electronic configurations of group 1 and group 2 elements?
45. What are esters? How are they prepared? List two uses of esters
46. List any two properties of the elements belonging to the first group of the modern periodic
table.
47. Study the following table in which positions of six elements A, B, C, D, E and F are shown as
they are in the modern periodic table:
On the basis of the above table, answer the following questions:
(i) Name the element which forms only covalent compounds.
(ii) Name the element which is a metal with valency three.
(iii) Name the element which is a non-metal with valency three.
(iv) Out of D and E, which is bigger in size and why?
(v) Write the common name for the family to which the elements C and F belong.
48. Elements forming ionic compounds attain noble gas configuration by either gaining or losing
electrons from their outermost shells. Give reason to explain why carbon cannot attain noble gas
configuration in this manner to form its compounds. Name the type of bonds formed in ionic
compounds and in the compounds formed by carbon. Also give reason why carbon compounds
are generally poor conductors of electricity.
49. (a) Why do we classify elements?
(b) What were the two criteria used by Mendeleev in creating his Periodic Table?
(c) Why did Mendeleev leave some gaps in his Periodic Table?
(d) In Mendeleev’s Periodic Table, why was there no mention of Noble gases like Helium, Neon
and Argon?
(e) Would you place the two isotopes of chlorine, Cl-35 and Cl-37 in different slots because of their
different atomic masses or in the same slot because their chemical properties are the same? Justify
your answer.
50. What is meant by ‘group’ in the modem periodic table? How do the following change on
moving from top to bottom in a group?
(i) Number of valence electrons (ii) Number of occupied shells
(iii) Size of atoms (iv) Metallic character of elements
(v) Effective nuclear change experienced by valence electrons
Biology:
Kindly do the following questions in your class book
Q1.Draw the structure of excretory unit of a human kidney and label the following
(a) Bowman’sCapsule
(b) Glomerulus
(c) Collecting duct
(d) RenalArtery
Q2. Discuss Mendel’s law of inheritance
Q3. Draw neat labeled diagram of various types of Asexual reproduction.
Q3 What are biogeochemical cycles?
Q4 Why do you think it is necessary to manage our natural resources for their better utilization.
Q5 Discuss ‘Chipko Movement’
Q6 What is fertilization?
Q7 What is the difference between zygote and embryo?
Q8 Why variations can be seen in sexual reproduction?
Q9 What are pollutatnts ? Suggests some ways to minimize the label of pollution in our atmoshphere.
Subject: Social Science
A. INDIA--MAP PRACTICE POINTS
History: In political maps (6) of India mark the following:
1. Places associated with the Civil Disobedience movement.
2. Places associated with the Non-Cooperation Movement.
3. The city associated with the Jallianwala Bagh incident.
4. Places associated with the sessions of the Indian National Congress.
5. Places associated with the Satyagraha movement of Mahatma Gandhi
6. Places associated with the agitations against the Rowlatt Act.
Geography: In Political maps (atleast 2) of India mark the following:
1. India Important Minerals pg. 54—Ajmer, Katni, Ratnagiri, Mangalore
2. India Power Plants pg 61---Barauni, Vijayawada, Tarapur
3. India Iron & Steel Plants pg 72—Jamshedpur, Bhillai, Burnpur, Bokaro
4. India Major Ports pg 89—Haldia, Kandla, Vishakapatnam
B. Study the following chapters properly for Pre-boards exams:
History: 1.The Nationalist Movement in Indo-China
2. Nationalism in India
Geography: 1. Minerals & Energy resources
2. Manufacturing Industries
3. Lifelines of National Economy
Civics: 1. Popular Struggles & Movements.
2. Political Parties
3. Outcomes of Democracy
4. Challenges to Democracy
Economics: 1. Money & Credit
2. Globalization & the Indian Economy
3. Consumer Rights.