Dear Parents - Lucknow Public Schoolsector-d.thelps.edu.in/UploadedFiles... · 11. The mole fraction of H 2 SO 4 in sulphuric acid solution is 0.15. What is the molality of the solution

$Page 1: Dear Parents - Lucknow Public Schoolsector-d.thelps.edu.in/UploadedFiles... · 11. The mole fraction of H 2 SO 4 in sulphuric acid solution is 0.15. What is the molality of the solution$
Dear Parents

Warm Greetings!

Summer Holidays are the most enjoyable period

for the children after a heavy and tedious

journey of an academic year. But utilizing these

holidays to rewind their academic is also very

important.

Importance of holiday home-work {For

Students}

1. Enlighten your Creative Skills.

2. The assignments tend to make you get

better as you get enough practice.

3. Definitely makes you understand concept

better.

4. You can stay away from reprimands if you

do it correctly and on time.

LUCKNOW PUBLIC SCHOOL SEC-D

HOLIDAY HOMEWORK

L.P.S SEC-D HOLIDAY-HOMEWORK-XI PCM P a g e | 2

CLASS XI

PHYSICS (042)

SESSION: 2018-19

GUIDELINES:-

1. Do all the questions in a separate H/W register in good handwriting.

2. These questions are very important and asked in Exams.

Date of Submission: 2nd July 2018 Subject Teachers: Mr. Brijesh Kumar

Mr. D.P. SINGH

Q1. What is Physics? Discuss the relation between physics and technology.

Q2. The fate of society is linked with the development of physics. Comment.

Q3. What is the role of physics in daily life?

Q4. State the various forces in nature.

Q5. Write the relative strength of various forces in nature.

Q6. Define the following terms: and in increasing order

Light year, Astronomical unit, Parsec.

Q7. How many astronomical units make 1 parsec?

Q8. Define atomic mass unit and express in kg.

Q9. What is the difference between mN, Nm and nm?

Q10. Why do we have different units for same physical quantity?


HOLIDAY HOMEWORK


Q11. State the principle of homogeneity of dimensions.

Q12. If x =a+bt+ct2, where x in meters and t in seconds. What are the units and

dimensional formulas of a,b and c?

Q13. The velocity v of a particle depends upon the time ‘t’ according to the equation

Determine the units of a, b, c and d. What physical quantities

they represent. All have SI units.

Q14. Verify the dimensional correctness of the following relations:

(i) v = u+at [v- final velocity, u- initial velocity, a- acceleration, t- time, s-

displacement]

(ii) (ii) s = ut + (½)at2

(iii) (iii) V = IR + W/Q + P/I [I-current, R- Resistance, W- work, Q- charge, P-

power]

Q15. The frequency of a wave moving on a string is known to depend upon the mass

per unit length of the string (m), its length (l) and the tension in the string (T). Use

dimensional analysis to obtain a relation for it.

Q16. Which of the following have same dimensions: (i) Force, pressure, stress. (ii)

Work, energy, force. (iii) momentum, velocity, impulse

Q17. In a particular system unit of length, mass and time are chosen to be 10cm, 10 g

and 0.1second respectively. What will be the unit of force in this system?

Q18.The area of a square plate is calculated by measuring the length to be 5.5 cm. If

the scale used has a least count of 0.1 cm then what is the maximum percentage error

in the area?


HOLIDAY HOMEWORK


Q19.Define dimension of a physical quantities. Write three limitations of dimensional

analysis.

Q20. y=A sin (ωt – kx); find the dimensional formula of k and ω, where y,A and x are

in metre and t in seconds.

Q.21

Q22. The air bubble formed by explosion inside water perform oscillations with time

period X is connected from X=ab2C. Calculate the percentage error in X, when % error

in a, b, c are 4, 2, and 3 respectively.


HOLIDAY HOMEWORK


Q23. Percentage error in the measurement of height and radius of cylinder are x and y

respectively. Find the percentage error in the measurement of volume. Which of the

two measurements height or radius needs more attention?

Q24. Orbital radius of mercury around the sun is 0.38 A.U. Find the angle of maximum

elongation for mercury and its distance from earth when the elongation is maximum.

Q25. Find the dimensions of linear momentum and surface tension in terms of velocity

v, density p and frequency v as fundamental quantities.

Q26. A gas bubble, forms an explosion under water, oscillates with a period T

proportional to pa db Ec, where p is the static pressure, d is the density of water and E is

the total energy of the explosion. Find the values of a, b and c.

Q27. Find the dimensions of a/b in the equation: F = a√x + bt, where F is force, x is

distance and t is time.

Q28. Two specific heat capacities of a gas are measured as Cp=(12.28±0.2) units and CV

=(3.97±0.3) units. Find the value of gas constant R with error limits, where

CP-CV=R.

Q29. In gas equation ( P+ a/v2)(V-b) = RT, where P is pressure, V is volume, T is

temperature. Find the dimensional formula of a/b.

Q30. Young's modulus of steel is 19 x 1010

N/m 2. Express it in dyne/cm

2. Here dyne

is the CGS unit of force.

Q31. If the dimensions of length are expressed as Gx c

y h

z , where G,c,h are the

universal gravitational constant, speed of light and plank’s constant respectively, what

are the value of x,y,and z ?

Q32. 5.05g of a substance occupies 1.5cc. Express its density in terms of significant

figures.


HOLIDAY HOMEWORK


Q33. The length and breadth of a field are measured as (100+4) m respectively. What is

the area of the field?

Q34. The size of the hydrogen atom is about 0.4 A. Calculate the total volume (in m3)

of a mole of hydrogen atom? Given 1Å=10-10

m.

Q35. The light emitted by a quasar takes billions of years to reach the Earth. What is the

distance of a quasar from which light takes 2.0 billion years to reach the earth?

Q36. Find dy/dx,

(i) y = 4x3 + πx

2 - 10

(ii) y = 1/x4

(iii) y = (x2 + 3)

(x

4-8)

Q37. Differentiate the following with respect to x :-

(i) sin2x

(ii) xsinx

(iii) sin(ax+b)

Q38. Integrate the following w. r. to x

(i) x3

(ii) x3 + 1/x3

(iii) (x – 1/x )2

Q39. Solve the following

(i) ʃ (x2 + sinx ) dx

(ii) ʃ π(ax+bx2+1/x)dx

Q40. Every walk of life is effected by the technological application of physics.

Justify this point of view.

*****


HOLIDAY HOMEWORK


CLASS XI

CHEMISTRY (043)

SESSION: 2018-19

GUIDELINES:-



Date of Submission: 2nd July 2018 Subject Teachers: Mr. MANEESH AWASTHI

Mr. FURQAN AHMAD

MOLE CONCEPT

1. Calculate the number of moles and atoms in 44.8 litres of SO2 at STP.

2. One million atoms of silver weigh 1.79 x 10-16 g. What is the atomic mass of silver?

3. Calculate the mass of CO2 molecules whose number is equal to the number of molecules present in 40g

oxygen.

4. Calculate the difference in the number of atoms contained in lg C-12 and lg C-14.

5. Calculate the number of molecules present in 12.3 g MgSO4 -7H2O. Calculate the mass of Na2CO3 which will

have molecules equal to those present in 12.3g of MgSO4 .7H2O.

6. Calculate the mass of the following and arrange them in increasing order.

(a) one gram atom (one mole atom) of nitrogen. (b) one silver atom

(c) one mole of O2 molecules (d) one mole of argon gas (e) 1023 atoms of C-12

7. A solution contains 25% water, 25% ethanol and 50% acetic acid by mass. Calculate the mole fraction of

each component.


HOLIDAY HOMEWORK


8. Calculate the mass fraction and mole fraction of ethyl alcohol and water containing 9.2 g alcohol and 18 g

water.

9. 2.82 g of glucose are dissolved in 30 g water. Calculate the molality of solution and mole fraction of water.

10. What is the mole fraction of the urea in 2.5 m aqueous solution ?

11. The mole fraction of H2SO4 in sulphuric acid solution is 0.15. What is the molality of the solution ?

12.Calculate the number of molecules of crystalline oxalic acid (H2C2O4 .2H2O) in 100 mL of 0.2M oxalic acid

solution.

13. Calculate the mole fraction of ethanol and water in An aqueous solution of ethanol in water is 1.54 molal.

Calculate the mass of ethanol in 250 g of solvent.

14. Concentrated HNO3 is 69% by mass. What is the volume of the solution which contains 23g concentrated

HNO3? Density of concentrated HNO3 is 1.41 g/cc.

15. In an organic compound , C =4O%, H = 6.6 % and O = 53.4 %. If the VD of the organic compound is 30, what

is its molecular formula ?

16. In an organic compound , the mass % of C = 85.8 and % H = 14.2. If vapour density of the compound is 28,

what is its molecular formula?

17. Mass % in an inorganic compound is Na = 29.11, S = 40.51, O = 30.28 What is its empirical formula?

18. In an inorganic compound , mass % of O =39.18, K = 3184 and Cl = 28.98. If molecular weight of the

inorganic compound is 122.5, what is its molecular formula ?

19. 1.5 g of impure sodium sulphate on treating with excess of barium chloride solution gives 1.74 g BaSO4.

What is the % purity of sodium sulphate in the sample?

20. Calculate the weight of Fe obtained by reducing 1 kg of ferric oxide. [Ans : 0.7 kg]

21. 10g sample of impure H2SO4. is treated with 7g chalk. The chalk left unreacted is 2.2 g. Calculate the %

purity of H2SO4.

22. 1.2 g sample of impure sodium chloride on treatment with excess of AgNO3 solution gave 2.4g AgCl.

Calculate the % purity of sodium chloride sample.


HOLIDAY HOMEWORK


ATOMIC STRUCTURE

1. Calculate wavelength of the radiations when the electron jumps from Ill to II orbit in

H-atom. The electronic energy in II and III Bohr orbit of H atom are -5.42x10-12 and —

2.4l x10-12 erg respectively

2. The energy E for an electron in H-atom is -21.7 x 10-12 /n2erg. Calculate the energy

required to remove electron completely from n = 2 orbit. Also calculate the longest

wavelength of light that can be used to cause this transition.

3. The ionisation energy of H atom is 2.179x10-18 J. Calculate the second IE of the He-

atom.

4. The electron energy of H atom in the ground state works out to be —2.18x 1043

J/atom. Calculate tl change in the position of electron if 1.938 >< 1048; supplied to

each H-atom ?

5. Calculate the wavelength of the radiation whose energy is : (a) 3.97 x10-8 erg, (b)

7.95x 10-19 Joule

6. The wavelength of a radiation is 3x10-7 metre. Calculate the energy of one mole of

photons.

7. Calculate the Wavelength of a photon whose energy is 2 electron volt.

8. A radiation provides 2 joule of energy. If its wavelength is 400 nm Calculate the

number of photons.

9. Calculate the KE of the electron ejected when light radiation of frequency 5.2x 1014

sec-1 strikes a metal. Threshold frequency of metal is 5 x1014 sec-1.

10. A light of wavelength 4000 A0 falls on an alkali metal whose critical wavelength for

photoelectric effect is 6600 A0. Calculate the KE of photo-electron ejected.


HOLIDAY HOMEWORK


11. A ball of 150 g is moving with a velocity of 50 metre/ sec. Show that its wavelength

is too shon to be seen.

12. Calculate the momentum of a particle whose de-Broglie wavelength is 0.1 nm.

13. KE of an electron is 100 eV What is the de-Broglie wavelength ?

14. Calculate the ratio of the wavelength of electron and proton if the proton is

moving with half the velocity of electron.

15. Calculate the momentum of a particle whose wavelength is 2 A0. Given that

16. Calculate the wave number of the radiation having frequency of 4.5x 1014

cycles/sec.

17. Calculate the wavelength of a ball of mass 0.1 kg moving with the velocity of 10

m/s.

18. Ionisation energy of H-atom is l.312x 106 J/mol. Calculate the energy required to

excite the electron from ground state to first excited state.

***


HOLIDAY HOMEWORK


CLASS XI

MATHEMATICS (041)

SESSION: 2018-19

GUIDELINES:-



Date of Submission: 2nd July 2018 Subject Teacher: Mr. DIWAKAR PANDEY

TRIGONOMETRY

Q.1. Convert 40◦ 20΄into radian measure.

Q.2. Convert 6 radians into degree measure.

Q.3. The minute hand of a watch is 1.5 cm long. How for does its tip move in 40 minutes? (use ∏=3.14 ).

Q.4. If the arcs of the same length in two circles subtend angles 65◦ and 110◦ at the centre , find the ratio of

their radii.

Q.5. Find the degree measures corresponding to the following radian measures (use ∏=

).

(i)

(ii) -4 (iii)

(iv)

Q.6. A wheel makes 360 revolutions in one minute. So how many radians does it turn in one second?

Q.7. Find the degree measures of the angles subtended at the centre of a circle of radius 100 cm by an

arc of length 22 cm (use ∏=

).

Q.8. In a circle of diameter 40 cm, the length of a chord is 20 cm. Find the length of minor arc of the chord.

Q.9. If in two circles, arc of the same length subtend angles 60◦ and 75◦ at the centre, find the ratio of their

radii.


HOLIDAY HOMEWORK


Q.10. Sin x=

, x lies in second quadrant. Find the value of other five trigonometric functions.

Q.11. Cot x=

, x lies in third quadrant. Find the value of other five trigonometric functions.

Q.12. Sec x=

, x lies in fourth quadrant. Find the value of other five trigonometric functions.

Q.13. Find the values of the trigonometric functions in the following .

Q.14. Prove that :

(i) Sin2

+ Cos2

- tan2

= -

(ii) Cot2

+ Cosec

+ tan2

= 6

Q.15. Find the value of : (i) Sin 75◦ (ii) tan 15◦

Q.16. Prove the following :

(i) (

)

( )

= (

) (ii)

=Cot2x

(iii)

(iv)

(v)

(vi)

(vii) )

(viii)

–

(ix)

=


HOLIDAY HOMEWORK


(x)

=

(xi)

=

(xii) –

(xiii)

(xiv)

(xv)


HOLIDAY HOMEWORK



HOLIDAY HOMEWORK


22. Express the shaded region of the adjoining Venn diagram in the term of union and intersection of the sets A,

B and C.

23. Let A and B two sets such that : n(A) =20,n(A B)=42 and n(a B)=4, Find (i) n(B), (ii) n(A-B) ,(iii) n(B-A)

24. Shade the following sets: (i)A΄ (ii) A΄ )

A B

C

25. Two finite sets have an m and n elements. The total no subjects of the set is 56 more than total number of

subjects of the second set. Find the value of m and n.

26. in a locality of 500 people, people speak Bengali or Urdu or both. 270 speak Bengali only and 75 speak

Bengali and Urdu. How many of them speak Urdu? Also find how many speak Urdu only?

27. (A is equal to

(a) B only (b) A only (c) A (d)

28. Find the number of non empty subsets of (1,2,3.........n).

29. If A,B and C are three non empty sets then, (A ) (A IS EQUAL TO :

(a) A (b) A (c) A (d)


HOLIDAY HOMEWORK


LINEAR INEQUATIIONS

SECTION-A

1. Find the solution set of an inequality 3x-5<x+7,when x is

(a) Positive

(b) A whole number

2. Solve 5x<24 when x∈ N, and represent the solution set on the number line.

3. Solve 3x+8>2 when

(1) x is a real number

4. Solve -12x>30 when x is a natural number

5. Solve the inequality for real x

4x+3<6x+7

SECTION-B

6. Solve 2x-3<x+2≤3x+5, x∈R

Draw the graph of the solution set.

7. Solve the following system of in equations

-

X+

;

-

>X

8. A manufacturer has 600liters of a 12% solution of acid, How man litres of a 30% acid solution must be

added to it so that acid content in the resulting mixture will be more than 15% but less than 18%.

9. Find all pairs of consecutive odd natural numbers, both of which a larger than are such that their sum is less

than 40.


HOLIDAY HOMEWORK



HOLIDAY HOMEWORK



HOLIDAY HOMEWORK


CLASS XI

ENGLISH CORE (301)

SESSION: 2018-19

GUIDELINES:-

1. The H/W should be done in respective class-work register in good handwriting.

2. Research work will be written in punch papers (max. 10 pages).

3. These questions may be asked in Unit Test-1.

4. Reading Part will be discussed.

Date of Submission: 2nd July 2018 Subject Teachers: Ms. SUSHMITA SARKAR

Mr. B.K.Singh

Mr. Alok Pandey

1. Read at least two works of fiction of your choice.

2. Draft notices for the following(one each)-

(a) Meetings

(b) Workshop

(c) Lost & Found

(d) Cultural event

3. Write a speech on – “ Why i want to become an Indian Ambassador to South Korea” in 150-200 words.

4. Research on the Egyptians Civilization- With particular reference to Tut’s Mummy & its discovery.

5. Research on sailing terminology & parts of a boat & gather information about Ile Amsterdam.

6. The recent storm caused great havoc in the city. Many buildings collapsed & several trees got

uprooted blocking traffic at several places. Write a report in 125 words.

7. Recently you went to your native village to visit your grandparents. You saw that some of the children

on the age group 5-14(school going age) remained at home, were working in the fields or were simply

loitering on the street. Write a letter to the editor of a national daily analysing the problem and

offering solution to it.


HOLIDAY HOMEWORK


CLASS XI

HINDI (302)

SESSION: 2018-19

GUIDELINES:-


Date of Submission: 2nd July 2018 Subject Teacher: Ms. KIRAN VERMA

x| & ued dk njksxk % ikB & 1 ;kn djksA

dkO; & ikB & 1 % dchj & HkkokFkZ i<+ks rFkk iz”uksRrj ;kn djksA

fuca/k & Hkkjrh; fdlku] ;qok ih<+h vkSj ns”k dk Hkfo’;] fy[kksA

i= & lM+dksa dh nqnZ”kk ij [ksn vkSj fpark O;Dr djrs gq, uxjikfydk v/;{k dks i=

fyf[k,A

*****


HOLIDAY HOMEWORK


CLASS XI

PHYSICAL EDUCATION (048)

SESSION: 2018-19

GUIDELINES:-


Date of Submission: 2nd July 2018 Subject Teacher: Mr. K.K.Kholia

UNIT- I

Q.1. Define physical education and explain the career options in physical education and

Sports.

Q.2. Explain the objectives of physical education.

Q.3. what do you mean by physical education? Mention the soft skills required for

careers in physical education.

UNIT- II

Q.1. Write an essay on Olympic movement.

Q.2. Write a note on:-

*Arjun Award

*Dhyanchand Award.

*Chacha Nehru Award.

*Rajeev Gandhi Award.

*****

Documents

Dear Parents - Lucknow Public Schoolsector-d.thelps.edu.in/UploadedFiles... · 11. The mole fraction of H 2 SO 4 in sulphuric acid solution is 0.15. What is the molality of the solution