DAV PUBLIC SCHOOL, BALASORE ASSIGNMENTS / ACTIVITIES / PROJECT WORK FOR THE SUMMER BREAK CLASS XI ENGLISH 1. Reread the following lessons for revision. The Portrait of a Lady; Photograph; The Summer of the Beautiful White Horse 2. Read the following lessons for pleasure We are not afraid to die…if we can all be together; Discovering Tut: The Saga Continues; The Laburnum Top; The Address; Ranga’s Marriage 3. Collect and paste in your copy two posters on any social issue. Taking hints, prepare a poster highlighting the importance of breathing exercises. (This will be done as an activity in a plain paper.) 5. Analyse the life of the grandmother (The Portrait of a Lady), and arrange your answer in the form of two paragraphs under these headings. Her fun and pleasure when he was in the village. Her worries and concern when she was in the city. 6. Prepare a speech analyzing the character of John Byro. (This is to be written in the copy.) 7. The cardboard preserves fond past memories for the poet. Elucidate the given statement with respect to your understanding of the poem Photograph. ****************
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DAV PUBLIC SCHOOL, BALASORE
ASSIGNMENTS / ACTIVITIES / PROJECT WORK FOR THE SUMMER BREAK
CLASS XI
ENGLISH
1. Reread the following lessons for revision.
The Portrait of a Lady; Photograph; The Summer of the Beautiful White Horse
2. Read the following lessons for pleasure
We are not afraid to die…if we can all be together; Discovering Tut: The Saga Continues;
The Laburnum Top; The Address; Ranga’s Marriage
3. Collect and paste in your copy two posters on any social issue. Taking hints, prepare a
poster highlighting the importance of breathing exercises.
(This will be done as an activity in a plain paper.)
5. Analyse the life of the grandmother (The Portrait of a Lady), and arrange your answer in
the form of two paragraphs under these headings.
Her fun and pleasure when he was in the village.
Her worries and concern when she was in the city.
6. Prepare a speech analyzing the character of John Byro. (This is to be written in the
copy.)
7. The cardboard preserves fond past memories for the poet. Elucidate the given
statement with respect to your understanding of the poem Photograph.
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PHYSICS
1) Revise the use of following mathematics formulas/ Skills
(a) All trigonometric identities done upto class X.
(b) Solving linear equations in one variable and two variables.
(c) Plotting graphs by making tables (x & y)
(d) Solving quadratic equations.
(e) Basic ideas on heights and distances, area and volume
(f) Basic ideas on geometry: Centroid, orthocenter, incenter and circumcentre, circles,
rectangles, square, Pythagoras theorem
2) Use IX class science NCERT and solve end chapter exercises on following
chapters:-
(a) Describing motion
(b) Laws of motion
(c) Work power and energy
(d) Gravitation
The above assignments are going to help understand the fundamentals of Physics.
ASSIGNMENTS FROM CLASS XI TOPICS
1. Find out the no. of. Significant digits in the followings;
a) 5.02
b) 0.0020
c) 1.230 cm
d) 5×104
2. Do the following algebra up to appropriate significant digit;
a) 0.05+5.236
b) 0.9-0.09
c) 5.5×6.20
d) 2.9÷0.06
3. Readings for the measurement of length of a rod is found as below
2.35cm, 2.36cm, 2.36cm, 2.34cm, 2.37cm respectively. Calculate the percentage error
in this measurement.
4. Calculate (up to correct significant digits) the curved surface area of a cylinder
having radius 1.00cm & length 2.3cm.
5. If the value of universal gravitation constant is 6.67×10-11 Nm2kg-2 in S.I. unit
system, then find its value in C.G.S. system.
6. State “Principle of Homoginity”. Using this principle check whether the following
equation is dimensionally correct or not.
7. Define ‘one astronomical unit’. Also find 1A.U.=_____________Light year.
8. Mention any 3 uses & any 3 limitations of dimensional analysis.
9. If, we assume, the time period of oscillation of a simple pendulum depends on (i)
the length of the string, (ii) the acceleration due to gravity & (iii) mass of the
pendulum bob, then derive the equation of time period for a simple pendulum.
10. Write three Physical quantities having the same dimension?
11. If s= a +bt+c, where s represents distance, t represents time. Find the dimension
of ‘a’.
12. Arrange Parsec, light year & Astronomical Unit in descending order of their
magnitudes.
13. The length of a rod is measured to be 5.2cm, 5.24 cm. respectively by two persons
A & B. Out of these two which reading is more precise and why?
14. A physical quantity ‘X’ is given by X = a3b2/c√d. If the percentage errors of
measurement in a, b, c & d are 4%, 2%, 3% & 1% respectively, then calculate the
percentage error in ‘X’.
15. If displacement of a body is S= (200 meter and the time taken by it is (10 0.1)
seconds, then find the percentage error in calculation of velocity.
16. Give an example of
(a) a physical quantity which has a unit but no dimensions
(b) a physical quantity which has neither unit nor dimensions
(c) a constant which has no unit
(d) a constant which has a unit.
17. State the law of homogeneity. In the given real gas equation (P
) ( = RT,
find the dimension of a/b. (‘V’ represents Volume & ‘P’ represents Pressure)
18. Diameter of a ball was measured to be 4.25cm, 4.30cm, 4.27cm, 4.32cm, 4.35cm &
4.27cm respectively. Express the result with percentage error in the measurement.
19. When 1m, 2kg and 1min are assumed as the fundamental units, the magnitude of
force is 18unit. What will be the value of the same force in C.G.S system?
20. In the expression P= where denote energy, angular
momentum, mass and universal gravitational constant respectively. Show that P is a
dimensionless quantity. (Hint: Dimension of angular momentum as [M1L2T−1])
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CHEMISTRY
1. Make a periodic table in a drawing sheet indicating different blocks of elements in
different colours.
2. Write the formula of the following :
(a) The acid present in vinegar
(b) The strongest acid
(c) Most deadly halogen acid
(d) Perchloric acid
(e) Acid present in ant sting
(f) Acid present in curd
(g) Baking Soda
(h) Blue vitriol
(i) Potash Alum
(j) Laughing gas
(k) Marble
(l) The chemical used in Nail polish remover
3. Prepare a chart on mole.
4. Make a power point presentation on any part of the following topic :
(a) Basic concept in chemistry
(b) Environmental Chemistry
(c) Structure of Atom
5. Two oxides of a certain metal were separately heated in a current of hydrogen
until constant weights of water were obtained. The water produced in each case was
carefully collected and weighed. 2 gms of each oxide gave respectively 0.2517 and
0.4526 grams of water. Show which law was established by these results? State the
Law.
6. (a) How much Potassium chlorate should be heated to produce 2.24L of oxygen at
NTP?
(b) The mass of 350 cm3 of a diatomic gas at 273K is 1.00g. Calculate the mass of one
atom of the gas.
(c) Chlorophyll responsible for photosynthesis in plants, contains 2.68% of Magnesium
by weight, Calculate the no. of magnesium atoms in 2.0g of chlorophyll.
7. (a) Calculate the molality of sulphuric acid solution in which the mole fraction of
water is 0.85.
(b) What is the mole fraction of solute in 2.5m aqueous solution?
8. Make a concept map on Classification of matter.
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MATHEMATICS
1. Using properties of sets, prove that for all sets A and B. (A B) – B = A – B.
2. Show that A B, then C – B C – A.
3. During exam days, in a survey of 100 students, 30 students did not bring ruler, 50
students did not bring erasers and 10 students did not bring any of the two. Using
Venn diagram, find how many of them have brought both the things.
4.In an examination,80% students passed in mathematics ,70% passed in science and
15% failed in both subjects .If 390 students passed in both subjects then find the total
number of students who appeared in the examination.
5. Let A and B be sets .If A X = B X = and A X = B X for some set X, show that
A = B.
6. From amongst the 100 literate individuals of a city, 50 read newspaper A, 45 read
newspaper B and 25 neither A nor B. How many individuals read both the newspapers
A and B?
7. For any two sets A and B, prove that P(A) = P(B) => A = B where P(A) and P(B)
denote power sets of A and B respectively.
8. How many elements are there in P(P( )) ?
9. A relation R is defined on set of non-negative integers as R = {(x,y): x2 + y2 =
100}.Write R in roster form. Also write the domain and range of R.
10. In a group of students,half the number of students know Hindi;
of them know
English ;10 know both the languages and 6 students do not know either Hindi or
English. Find how many students are there in the group.
11. Using properties of sets, prove that for all sets A and B
(A B) (A – B) = A
12. Show that A B = A B => A = B.
13. Let A = {1,3,5}.Define a relation R from A to A by
R = {(x,y):x + y > 6;x,y A}
(i) Write R in roster form.
(ii) Write its domain and range.
14. In a group of 50 students,14 drink orange juice but not eat apple,30 drink orange
juice and each student like at least one of them. Find
(i) How many drink orange juice as well as eat apple?
(ii) How many eat apple but not drink orange juice?
15. Write the number of subsets of A B where A = {1,2,3}, B = {a,b,c}.
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BIOLOGY
1. Metabolism is a defining feature of all living organisms without exception.
Isolated metabolic reactions in vitro are not living things but surely living.
reactions. Comment.
2. Do you consider a person in coma-living or dead ?
3. Write the class and family of the following
(a) Wheat (b) Mango(c) Tiger (d) Pigeon
4. How many ascospores are produced in an ascus?
5. Why are the duteromycetes are called imperfect-fungi?
6. Are chemosynthetic bacteria autotrophic or heterotrophic?
7. In the five kingdom system of whittaker, how many kingdoms are eukaryotes?
8. Polluted water bodies have usually very high abundance of plants like Nostoc and
Oscillitoria .Give reasons.
9. A scientist has come across a plant, which he feels is a new species. How will he go
about its identification , classification and nomenclature?
10. In the five kingdom system of Whittaker, How many kingdoms are eukaryotes?
ASSERTION AND REASONING
Directions: In the following questions, a statement of assertion is followed by a
statement of reason. Mark the correct choice as:
(a)If both Assertion and Reason are true and Reason is the correct explanation of
Assertion.
(b) If both Assertion and Reason are true but Reason is not the correct explanation of
Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.
11.1 Assertion : Bacteria are prokaryotic.
Reason : Bacteria do not possess true nucleus and membrane bound cell
organelles.
11.2 Assertion: Archaebacteria are able to survive in harsh habitats.
Reason: Archaebacteria survive in extreme conditions due to the presence
of peptidoglycan in their cell wall.
11.3 Assertion : Chemosynthesis is an autotrophic nutrition.
