# KHAITAN PUBLIC SCHOOL HOLIDAY HOMEWORK SESSION PUBLIC SCHOOL HOLIDAY HOMEWORK SESSION: 2016-2017 CLASS-XI PHYSICS 1. ... investigatory project for class 12

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• KHAITAN PUBLIC SCHOOL

HOLIDAY HOMEWORK

SESSION: 2016-2017

CLASS-XI

PHYSICS

1. Working model according to CBSE norms.

2. Assignments for chapters-Physical world and measurement & Kinematics

3. Extra questions for each topic (HOTS)

CHEMISTRY

1. A copy of this assignment should be pasted in the classwork register.

2. All the multiple choice questions should be solved in the register and the answers

should be marked in the assignment sheet.

3. Revise the chapters 1, 2

4. You have to come prepared with a hands on activity which can be built to an

investigatory project for class 12

ASSIGNMENT ON QUANTUM NUMBERS (L-2)

Q1. True or False

a). n has integral values from 1 to .

b). l has values from 1 to .

c). ml has values from - l to + l.

d). ms has values from +1/2 to 1/2.

e) The n=3 energy level has no f orbitals.

f) The 2p orbitals can have a maximum of 6 electrons.

g) The s orbital has a spherical shape.

h) The n=4 energy level has three sublevels

Q2. Which of the following sets of quantum numbers is NOT permissible? And why?

a. n = 1, l = 0, ml = 0, ms = +

• b. n = 4, l = 0, ml = 0, ms = +

c. n = 3, l = 3, ml = -3, ms = -

d. n = 2, l = 1, ml = 1, ms = -

e. n = 2, l = 1, ml = 2, ms = +

a. What is the value of l for a 4f electron?

b. What is the orbital designation for an electron in the M shell and p subshell?

c. What are the possible values of ml for a 5d electron?

d. What is the maximum number of electrons in the 3rd energy level?

e. How many orbitals in an atom have the following quantum numbers: n = 4, l = 2, ml = -2?

f. How many electrons have the following quantum numbers: n =4, l = 2, ml = -2 ?

g. How many electrons have the following quantum numbers: n =3 & l = 2 ?

h. How many electrons have the following quantum numbers: n =5 &ms = -1/2 ?

Q4 Which of the following orbitals can not exist?1s , 3p , 1p , 7d , 3f , 4s , 2d , 8g

Q5. Name the orbitals described by the following quantum numbers

a) n = 3, l = 0 b) n = 3, l = 2 c) n = 3, l = 3 d) n = 5, l = 0 e) n =

3, l = 1

Q6. Place the following orbitals in order of increasing energy: by ( n+L) value 3s, 6s, 3d, 4f,

3p, 7s, 5d, 5p

Q7. Fill in the blanks with the correct response:

a. The number of orbitals with the quantum numbers n=3, l=1 and ml = 0 is _________.

b. The subshell with the quantum numbers n=4, l=3 is designated as _________.

c. The total number of ml values for a d orbital are ________________________.

d. The allowed values of l for the shell with n=2 are _________.

e. The lowest value of l for the shell is _________.

f. The number of orbitals in a shell with n=4 is _________.

g. The number of electrons with n=3 and l=1 is _________.

• h. The maximum number of electrons with quantum numbers with n=3 and l=2 is

_________.

i. When n=2, l can be _________.

j. When n=2, the possible values for ml are _________.

k. The number of electrons with n=4, l=1 is _________.

l. The subshell with n=3 and l=1 is designated as the __________ subshell.

m. The lowest value of n for which a d subshell can occur is n=_________.

n. The number of electrons with n=4, ml=3 ,ms=+1/2 is _________.

Q8. Match the quantum numbers with the information provided by these. Quantum number

Information provided

(i) Principal quantum number (a) orientation of the orbital

(ii) Azimuthal quantum number (b) energy and size of orbital

(iii) Magnetic quantum number (c) spin of electron

(iv) Spin quantum number (d) shape of the orbital

Q9Match the following rules with their statements : Rules Statements

(i) Hunds Rule (a) No two electrons in an atom can have the same set of four quantum

numbers. (ii) Aufbau Principle (b) Half-filled and completely filled orbitals have extra

stablity.

(iii) Pauli Exclusion Principle (c) Pairing of electrons in the orbitals belonging to the same

subshell does not take place until each orbital is singly occupied.

(iv) Heisenbergs Uncertainty Principle (d) It is impossible to determine the exact position

and exact momentum of a subatomic particle simultaneously.

(e) In the ground state of atoms, orbitals are filled in the order of their increasing energies.

Q10. Calculate the wave length of a golf ball weighing 100 g and moving with velocity as 20

% of the speed of light.

Q11.Fill in the blanks with the correct response:

(i)The number of orbitals with the quantum numbers n=3, l=2 and ml = 0 is _________

(ii) The number of valence electrons in the outermost p subshell of a sulfur atom is ____.

(iii) The number of unpaired electrons in a Mn2+ ion is _________.

(iv) The subshell with the quantum numbers n=4, l=2 is _________.

• (v) The ml values for a d orbital are ________________________

(vi) The allowed values of l for the shell with n=2 are _________.

BIOLOGY

1. Prepare your project-1. Plant a tree

2. Perform its nomenclature.

3. Study its leaves ,its venation and succession.

4. Study its floral structure and details in later stages

5. Assignments for chapters-Plant reproduction and Animal reproduction

6. Complete all the practicals discussed in class

7. Revision of Unit-I

ACCOUNTANCY

Students are required to make a project keeping in mind the following: -

1. Collection of Source Documents for at least 10 transactions of any business.

2. Preparation of Vouchers from the above collected Source Documents. 3. Presentation of Project Work on A4 size (interleaf):

a) Page 1 Name of the student b) Page 2 Index of Project File c) Page 3 Certificate d) Page 4 Acknowledge e) Page 5 - Subject Matter f) Page 6 Data required g) Page 7 onwards Presentation of information in the form of Vouchers.

4. Students can take an idea from Project 2 given in their book. 5. In case of any query contact Ms. Sapna at 9873333141 or

sapna.malhotra@khaitanpublicschool.com

Write a Short note on the following terms:

Q1: If a person sells his/ her domestic T.V. set at a profit, will it be considered as a business?

Also, explain the characteristics of business which is being stressed upon in the above said

example.

Q2: Define service. Name the service which is related to the following cases:

a) The service which helps in removing hindrance of knowledge.

b) The service which helps in removing hindrance of place.

mailto:sapna.malhotra@khaitanpublicschool.com

• c) The service which helps in removing hindrance of time.

d) The service which helps in removing hindrance of risk.

Q3: One man control is best in the world if that one man is big enough to manage

everything. Explain the statement.

Q4: Compare the status of a minor in a joint Hindu family business with that in a partnership

firm.

Q5: Which form of business is suitable for following types of business and why?

a) Beauty parlour b) Small retail outlet c) Hotels d) Shopping malls e) Medium size trading

concern

Project Work:

The objective of introducing this project among students is to give a first hand experience to

them regarding the different types of business units operating in their surroundings, to

observe their features and activities and relate them to the theoretical knowledge given in

their text books.

Prepare a project related to important Multinational and Joint stock companies along with

their product details and business objectives.

Note: You have to prepare your project on the objectives/products available of different

ECONOMICS

Assignment sheet

Chapter 1& 2: Statistics for Economics & Collection of data

Q1: Problem of choice is unavoidable is the ordinary business of life. How?

Q2: Explain how scarcity is the undercurrent of Economics.

Q3: Distinguish between Qualitative and Quantitative data, and give some examples of both.

Q4: Name the stages of statistical study and statistical tools for presentation of data.

Q5: Statistical methods are dangerous weapons in unqualified person. Explain

Q6: What are the main methods of collecting primary data?

Q7: What precautions are necessary to use secondary data?

• Q8: Statistical tables giving district wise birth and death rates are obtained from publications

of the census of India 2011. Would you call them primary or secondary data? Give two

Q9: List any five Schemes Launched by Prime minister of India during last two years for the

economic development of the country.

Project work:

You have to prepare Project Report on Consumer Awareness among Households regarding

different type of products like consumable, Durable and capital goods , they areusing.

Do not confuse consumer awareness with product awareness.

Consumer awareness is a much broader and wider concept. It covers the following questions:

i) Are the consumer

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