DEWAN PUBLIC SCHOOL INTERNATIONAL, MEERUT

SUMMER VACATION ASSIGNMENT 2019-20

CLASS-XI

ENGLISH

1. Read one of the following books and answer the questions given below

a) Hamlet-William Shakespeare

b) Taming of the shrew- William Shakespeare

c) Wuthering Heights-Emily Bronte

d) Long The Walk To freedom- Nelson

e) The kite Runner-Kaled Momdela Hosseine

f) The Awakening- Kate Chop in

g) Pride And Prejudice-Jane Austen

 Give a through plot summary including all important events in 150-200 words.

 Choose five memorable quotes from the text write the quote and the page

number and thereby explain the quotes significance to the plot.

2. Explain the following literacy devices with examples

a) simile

b) Metaphor

c) Personification

d) Alteration

e) Repetition

f) Oxymoron

g) Refrain

h) Hyperbole

i) Allusions

j) Irony

k) Paradox

l) Onomatopoeia

m) synecdoche

n) transferred epithet

i) pum

3. Stick 5 newspaper reports based on the accidents, catastrophe burning issue etc

in your writing skills (language) class work registers.

(B.B.C Assignment)

4 Do the following BBC assignments.

(a) Reading

Module-1 pg no. 13 to 21

Module-2 pg no. 78 to 83

(b) Writing

Module-4 pg no. 211 to 214

pg no. 228 to 231

(c) Grammar

Module-6 pg no. 393 to 397

(d) Literature-To learn the syllabus covered till date.

(Note:- On 1 and 2 are to be submitted in project file)

PHYSICS

MEASUREMENT

Q1. Does magnitude of a quantity change with change in the system of units?

.

Q2. Can a body have zero mass and zero weight?

Q3. Name two types of mass.

Q4. Human heart is an inbuilt clock. Comment.

Q5. Which of these is largest : astronomical unit, light year and par sec?

Q6.What is the order of size of our galaxy?

Q7. Which is the most accurate clock?.

Q8. The sun’s angular diameter is measured to be 1920’’. The distance of the sun

from the earth is 1.496 Χ 1011 m. what is the diameter of the sun? ans. 1.39 Χ 109

m

DIMENSIONS

Q9. A famous relation in physics relates moving mass m to the rest mass m0 of a

particle in terms of its speed v and the speed of the light c. A boy recalls the

relation almost correctly but forgets where to put the constant c. He writes:

m = mo / (1 – v2)1/2

Guess where to put the missing c.

Q10. A calorie is a unit of heat energy and it equals about 4.2 J, where 1 J = 1

kgm2 s-2. Suppose we employ a system of units in which the unit of mass equals 𝛼

kg, the unit of length equals β m, the units of time is ϒ sec. show that a calorie has

a

magnitude 4.2 𝛼-1 β-2 𝛾2 in terms of the new units.

Q11. The rate of flow (V) of a liquid may depend on radius (r) of pipe, pressure

gradient (P/l) & coefficient of viscosity of liquid. Prove V = 𝜋 𝑃 𝑟4

8 𝑙 𝜂

Q12. If E,M,J and G respectively denote energy, mass, angular momentum and

gravitational constant, Calculate the dimensions of EJ2 /M5 G2

ERROR

Q12.Given relative error in the measurement of length is 0.02, what is the

percentage error? Ans: percentage error = 2 %

Q13.If heat dissipated in a resistance can be determined from the relation: H = I2 R

t joule , If the maximum error in the measurement of current, resistance and time

are 2% ,1% , and 1% respectively, What would be the maximum error in the

dissipated heat?

Ans: % error in heat dissipated is ±6 %.

Q14. What is meant by significant figures ? State the rules for counting the number

of significant figures in a measured quantity?

Q15. Show that the maximum error in the quotient of two quantities is equal to the

sum of their individual relative errors.

Ans : For x = a/b , Δx/x = ± ( Δa/a + Δb/b)

Q16. What is meant by significant figures .State the rules for counting the number

of significant figures in a measured quantity?

Q17. A physical quantity X is given by X = A2 B3 /√𝐶 D , If the percentage errors

of measurement in A,B,C and D are 4%,2%,3% and 1% respectively, then

calculate the % error in X.

Q18. If two resistors of resistance R1=(4 ± 0.5)Ω and R2=(16 ± 0.5)Ω are

connected (1) In series and (2) Parallel . Find the equivalent resistance in each case

with limits of % error.

Q19. The length of a rod measured in an experiment was found to be 2.48m, 2.46,

2.50m and 2.48m and 2.49m, Find the average length, the absolute error in each

observation and % error.

Q20. In an experiment, on the measurement of g using a simple pendulum the time

period was measured with an accuracy of 0.2 % while the length was measured

with accuracy of 0.5%. Calculate the percentage error in the value of g.

Q21. If the error in radius is 3%, what is error in volume of sphere? Ans : ( c ) 9%.

MOTION IN STRAIGHT LINE

NCERT CH. 3

EXERCISE PROBLEMS

3.19,3.20, 3.23, 3.25, 3.27, 3.28

CHEMISTRY

Unit 1-Some basic concepts of chemistry

Q1. (a) State and explain Avogadro’s law. Illustrate it with an example.

(b) 10.0 L of a welding gas weighs 11.6 g at STP. Calculate the molar mass

of this gas. [Ans.: 26.0 g/mol]

Q2. (a) Calculate the mass of CaCO3 required to react completely with 25mL of

0.75 M HCl. [Ans.: 0.938 g]

(b) Calculate volume of CO2 released at STP in this reaction. [Ans.: 0.21 L]

Q3. (a) Calculate the molarity of solution prepared by dissolving 175.5 g NaCl in

enough water to form 1.0 L of brine solution. (b) Calculate molality of

solution if its density is 1.25 g ml−1. (c) Calculate the mole fraction of

NaCl.

Q4. Calculate the number of atoms in :

(a) 5.0 L oxygen gas at STP (b) 4.4 g of CO2 (c) 52 u of He

Q5. Calculate the number of moles : (a) 05. L of 0.75 M Na2CO3 (b) 7.85 g iron

(c) 34.2 g sucrose (C12H22O11)

Q6. A compound contains 4.07% hydrogen, 24.27% carbon and 71.65%

chlorine. I ts molar mass is 98.96 g. Determine its emperical and

molecular formulas.

Q7. Calculate the mass of iron which will be converted into its oxide (Fe3O4) by

action of 18 gram of steam on it?[Fe=56]

[Ans.42g]

Q8. What mass of slacked lime would be required to decompose completely 4

grams of ammonium chloride and what would be mass of each product?

[Slacked lime =2.766g, CaCl2=4.15g, NH3=1.271g, H2O=1.3458g]

Q9. 1.5g of impure sample of sodium sulphate dissolved in water was treated

with excess of barium chloride solution when 1.74g of BaSO4 were obtained

as dry precipitate . Calculate the % purity of sample.

[Ans. 70.67]

Q10. 1.84 g mixture of CaCO3 and MgCO3 is strongly heated till no further loss

of mass takes place . The residue weighs 0.96g. Calculate the % composition

of the mixture?

[CaCO3=54.35, MgCO3=45.65]

Q11. In the commercial manufacturing nitric acid , how many moles of NO2

produce 7.33 mol of HNO3 in the reaction:-

3NO2(g)+H2O(l) 2HNO3(aq)+NO(g) [10.995

mols]

Q12. One litre of oxygen at STP is made to react with 3 litres of CO at STP.

Calculate the mass of each substance found after the reaction . Which one is

limiting reactant? [CO unused=1.25g, CO2 produced =3.928g

LR=oxygen]

Q13. A solution of oxallic acid (COOH)2.2H2O is prepared by dissolving 0.63 g

of the acid in 250 cm3 of the solution . Calculate (a) molarity (b) normality of

solution

[M=.02,N=.04]

Q14. Calculate the percentage of water of crystallization in the sample of blue

vitriol.[CuSO4.5H2O] [36.07%]

Unit 2-Structure of atom

Q.. Choose the correct answer 1x5=5

Q1. If n=3,l=0,m=0 then atomic number is

a) 12,13 b) 13,14 c) 10,11 d) 11,12

Q2. Which of the following element outermost orbit’s last electron has magnetic

quantum number m=0?

a) Na b) O c) Cl d) N

Q3. Maximum number of electrons in a subshell of an atom is determined by the

following

a) 2l+1 b) 4l-2 c) 2n2 d) 4l+2

Q4. Total number of orbitals associated with second shell will be

a) 2 b) 4 c) 9 d) 3

Q5. Which of the following is rule out the existence of definite paths or

trajectories of electron

a) Pauli’s exclusion principle

b) Heisenberg’s uncertainty principle

c) Hund’s rule of maximum multiplicity

d) Aufbau Principle

Q6. What is the number of photons of light with a wavelength of 4000 pm that

provide 1 J of energy?

Q7. Calculate the range of frequencies of visible light from having wave length

3800-7600Ao

Q8. What is the difference between an orbit and an orbital ?

Q9. Name the series of lines present in the visible region of the hydrogen

spect