Class -11th Subject-Chemistry Date -30/04/2020 Chapter

Class -11th

Subject-Chemistry

Date -30/04/2020

Chapter- Mole Concept

(Do it in your practice notebook)

Q.1 How many g of S are required to produce 10 moles and 10g of H2SO4

respectively?

Q.2 P and Q are two elements which form P2Q3 and PQ2 molecules. If 0.15 mole

of P2Q3 and PQ2 weighs 15.9 g and 9.3g, respectively, what are atomic mass of

P and Q?

Q.3 How many molecules are in 5.23 gm of glucose (C6H12O6).

Q.4 What is the molecular mass of a substance, each molecule of which contains

9 carbon atoms, 13 hydrogen atoms and 2.33 × 10-23 g of other component?

Q.5 The density of O2 at 0 0C and 1 atm is 1.429g / litre.Find the molar volume of

gas.

Subject Class: 11th

Arts Homework (30/04/2020)

Geography: Geography as a discipline.

Ch- 3 (Interior of the Earth) पृथ्वी की आंतरिक संिचना.

Learn and write shot answer type questions in F/C notebook

Class-11

Subject – Accountancy

Date- 30-4-2020

Home Assignment

Chapter – 3 (Accounting Principle)

Do in your fair notebook.

Need of Accounting Principles:

In order to make the accounting principles meaningful to its internal and external users, it is

significant that such information is reliable as well as comparable. The comparability of

information is required to see how a firm has performed as compared to the other firms and how

it has performed as compared to the previous years. This becomes possible only if the

information provided by the financial statements is based on some set rules known as policies,

principles and conventions. These rules (usually called GAAP) bring uniformity and consistency

to the process of accounting and enhance its utility to different users of accounting information.

Kinds of Accounting Principles: - Accounting Principles are described by various terms

such as assumptions, conventions, concepts, doctrines, postulates etc.

These principles can be classified mainly into two categories: -

(1)Accounting Concepts or Assumptions

(2) Accounting Conventions

(1) Accounting Concepts or Assumptions: - In order, to make the accounting

language convey the same meaning to all people and to make it more meaningful, most of the

accountants have agreed on a number of concepts which are usually followed for preparing the

financial statements. These concepts provide a foundation for accounting process. No

enterprise can prepare its financial statement without considering these basic concepts or

assumptions. The concepts guide how transactions should be recorded and reported. Following

may be treated as basic concepts or assumptions: -

As per Accounting standard (As-1), issued by the Institute of Chartered Accountants of India,

there are three fundamental accounting concepts or assumptions:

(1)Going Concern Concept

(2) Consistency Concept

(3) Accrual Concept

Other Accounting concepts:

(4) Business Entity Concept

(5) Money Measurement Concept

(6) Accounting Period Concept

(7) Cost Concept or Historical cost Concept

(8) Matching Concept

(9) Dual Aspects Concept

Class-11

Subject – Business Studies

Date- 30-4-2020

Home Assignment

Unit-2 (2.1) Sole Proprietorship (continue)

Do in your fair notebook.

Merits of sole Proprietorship: - The following are the merits of sole trade:

(1)Quick Decision: - A sole trader runs the entire trade single- handedly and he does not

need to consult anybody. Hence, he benefits his business by taking quick decisions.

(2) Benefit of Secrecy: - Many important facts need to be concealed for the success of

business. For example, if a sole trader is thinking of expanding the size of his business, this

thought will remain confined to him till he gives it a practical shape and the competitors will not

come to know about it.

(3) Direct Motivation: - A sole trader does not require any external motivation for doing the

work. He is self- inspired by the fact that whatever profit he gets will go into his pocket.

(4) Personal Control: - The sole trader has a complete control over the business because

he is the only owner and the master of everything. All the employees are under his control and

nobody can afford to be careless in his work. In this way good work is possible at less cost and

time.

(5) Easy Formation: - It is very easy to establish sole trade because there is no need to

observe any legal formalities to start it. This business can be started without getting it

registered. But if the business is to be started where there is government control, it may require

a licence to start such a business. For example, it is necessary to get a licence to open a

chemist shop.

Limitations of Sole Proprietorship: - The following are the demerits of sole trade.

(1)Limited Sources of Capital: - In the sole trade the trader himself is the financial

source and the sources of taking loan are limited. A single individual generally cannot have both

these sources so that he can expand his trade and enjoy the benefits of a big trade.

(2) Unstable Existence: - There is a continuous uncertainty in running a sole trade. If

because of some circumstances or illness the trader has to remain away from the place of

business. He has either to leave the business under the care of his employees or has to close

establishment for some time. As a result of this, the customers get dissatisfied and start

purchasing things from other shopkeepers. If the owner dies the business has to be closed.

(3) Unlimited Liability: - The greatest disadvantage of the sole trade is the unlimited

liability or the utmost individual risk that is inherent in it. The sole trader has to face the entire

risk of business. If unfortunately the business fails he losses everything and so much so that his

household things are also sold. The unlimited liability is the greatest hurdle in the way of the

development of the sole trade.

(4) Unbalanced Management: - In the sole trade, all the activities like sale, purchase,

production, marketing, finance, etc., have to be performed by the trader himself and, generally,

no single individual can be so capable as to perform all these activities successfully. He has to

face many managerial and other problems and a result of this his decisions get imbalanced. On

the other hand, because of limited financial resources the appointment of a manager on salary

cannot be made. Hence, this form of business organization remains deprived of the advantage

of managerial services.

Class-11

Subject – Economics

Date- 30-4-2020

Home Assignment

Chapter-3 (consumer’s Equilibrium – utility Analysis)

Learn and write the following questions.

1.What is meant by utility?

Ans. Utility refers to the want satisfying capacity of a commodity.

2. what is meant by cardinal measurement of utility?

Ans. Cardinal measurement of utility refers to the measurement (or expression) of utility in terms

of units like 2, 4, 6, and 8.

3. what is meant by ordinal measurement of utility?

Ans. Ordinal measurement of utility refers to the measurement (or expression) of utility in terms

of some rank like high or low (more or less).

4. Define total utility.

Ans. Total utility is the sum total of utility derived from the consumption of all units of a

commodity.

5. Define Marginal utility.

Ans. Marginal utility refers to the additional utility due to the consumption of an additional unit of

a commodity.

6. state the law of diminishing marginal utility.

Ans. Law of diminishing marginal utility states that as more and more units of a commodity are

consumed, marginal utility derived from every additional units must decline.

7. what is the meaning of consumer’s equilibrium?

Ans. A consumer is in a state of equilibrium when he maximizes his satisfaction by spending his

given income on different goods and services.

8. what is meant by marginal utility of money?

Ans. Marginal utility of money refers to utility that the consumer expects to obtain from a

standard basket of goods which he or she can buy for a rupee.

MD SR. SEC. SCHOOL, MANKROLA

CLASS- 11 THs

SUBJECT – BIOLOGY

HOME ASSIGNMENTS DATE : 30/04/2020

CHAPTER – 1 ST THE LIVING WORLD

Wish you very Good morning to all students.

Yesterday we know about Botanical Gardens, Museums and keys and

different types of Taxonomical Aids.

Today I am sharing some Ncert solution of this chapter.

Students, Your work should be neat and clean in your Note Book.

NCERT SOLUTIONS :-

7. Can you identify the correct sequence of taxonomical catagories?

Ans. (a)Species->Order -> Phylum -> Kingdom

(b) Genus -> species -> order -> kingdom

© Species -> Genus -> order -> Phylum

Sol. The correct sequence of taxonomical categories is

© Species -> Genus -> order -> Phylum

Ques 8. How is a key helpful in the identification and classification of an

organism?

Ans. Key is an artificial analytic device having a list of statements with

dichotomic table of alternate characteristic. Taxonomic keys are aids for

rapid identification of unknown plants and animal based on the

similarities and dissimilarities. Keys are primarily based on stable and

reliable characters. The keys are helpful in a faster preliminary

identification which can be backed up by confirmation through

comparison with detailed description of the taxon provisionally

identified with. Seprate taxonomic category like family , Genus and

Species.

1 | P a g e

www.ncerthelp.com (Visit for all ncert solutions in text and videos, CBSE syllabus, note and many more)

Physics Notes Class 11 CHAPTER 2 UNITS

AND MEASUREMENTS

The comparison of any physical quantity with its standard unit is called measurement.

Physical Quantities

All the quantities in terms of which laws of physics are described, and whose measurement is

necessary are called physical quantities.

Units

A definite amount of a physical quantity is taken as its standard unit.

The standard unit should be easily reproducible, internationally accepted.

Fundamental Units

Those physical quantities which are independent to each other are called fundamental

quantities and their units are called fundamental units.

S.No. Fundamental Quantities Fundamental Units Symbol

1. Length metre m

2. Mass kilogram kg

3. Time second S

4. Temperature kelvin kg

5 Electric current ampere A

6 Luminous intensity candela cd

7 Amount of substance mole mol

Supplementary Fundamental Units

Radian and steradian are two supplementary fundamental units. It measures plane angle and

solid angle respectively.

S.No. Supplementary Fundamental Quantities Supplementary Unit Symbol

1 Plane angle radian rad

2 Solid angle steradian Sr

Derived Units

http://www.ncerthelp.com/

2 | P a g e


Those physical quantities which are derived from fundamental quantities are called derived

quantities and their units are called derived units.

e.g., velocity, acceleration, force, work etc.

Definitions of Fundamental Units

The seven fundamental units of SI have been defined as under.

1. 1 kilogram A cylindrical prototype mass made of platinum and iridium alloys of height

39 mm and diameter 39 mm. It is mass of 5.0188 x 1025 atoms of carbon-12.

2. 1 metre 1 metre is the distance that contains 1650763.73 wavelength of orange-red light

of Kr-86.

3. 1 second 1 second is the time in which cesium atom vibrates 9192631770 times in an

atomic clock.

4. 1 kelvin 1 kelvin is the (1/273.16) part of the thermodynamics temperature of the triple

point of water.

5. 1 candela 1 candela is (1/60) luminous intensity of an ideal source by an area of cm’ when source is at melting point of platinum (1760°C).

6. 1 ampere 1 ampere is the electric current which it maintained in two straight parallel

conductor of infinite length and of negligible cross-section area placed one metre apart

in vacuum will produce between them a force 2 x 10-7 N per metre length.

7. 1 mole 1 mole is the amount of substance of a system which contains a many elementary

entities (may be atoms, molecules, ions, electrons or group of particles, as this and atoms

in 0.012 kg of carbon isotope 6C12.

Systems of Units

A system of units is the complete set of units, both fundamental and derived, for all kinds of

physical quantities. The common system of units which is used in mechanics are given below:

1. CGS System In this system, the unit of length is centimetre, the unit of mass is gram

and the unit of time is second.

2. FPS System In this system, the unit of length is foot, the unit of mass is pound and the

unit of time is second.

3. MKS System In this system, the unit of length is metre, the unit of mass is kilogram and

the unit of time is second.

4. SI System This system contain seven fundamental units and two supplementary

fundamental units.

Relationship between Some Mechanical SI Unit and Commonly Used Units

S.No. Physical Quantity

Unit

1 Length (a) 1 micrometre = 10

-6 m

(b) 1 angstrom =10-10

m

2 Mass (a) 1 metric ton = 103 kg


3 | P a g e


(b) 1 pound = 0.4537 kg

(c) 1 amu = 1.66 x10-23

kg

3 Volume

1 litre = 10-32

m3

4. Force (a) 1 dyne = 10

-5 N

(b) 1 kgf = 9.81 N

5. Pressure

(a) 1 kgfm2 = 9.81Nm

-2

(b) 1 mm of Hg = 133 Nm-2

(c) 1 pascal = 1 Nm-2

(d) 1 atmosphere pressure = 76 cm of Hg = 1.01 x 105 pascal

6. Work and energy

(a) 1 erg =10-7

J

(b) 1 kgf-m = 9.81 J

(c) 1 kWh = 3.6 x 106 J

(d) 1 eV = 1.6 x 10-19

J

7. Power (d) 1 kgf- ms

-1 = 9.81W

1 horse power = 746 W

Some Practical Units

1. 1 fermi =10-15 m

2. 1 X-ray unit = 10-13 m

3. 1 astronomical unit = 1.49 x 1011 m (average distance between sun and earth)

4. 1 light year = 9.46 x 1015 m

5. 1 parsec = 3.08 x 1016 m = 3.26 light year

Some Approximate Masses

Object Kilogram

Our galaxy 2 x 1041

Sun 2 x 1030

Moon 7 x 1022

Asteroid Eros 5 x 1015

Dimensions

Dimensions of any physical quantity are those powers which are raised on fundamental units to

express its unit. The expression which shows how and which of the base quantities represent

the dimensions of a physical quantity, is called the dimensional formula.

Dimensional Formula of Some Physical Quantities

S.No.

Physical

Quantity

Dimensional

Formula

MKS

Unit


4 | P a g e


1 Area [L2] metre

2

2 Volume [L3] metre

3

3 Velocity [LT-1

] ms-1

4 Acceleration [LT-2

] ms-2

5 Force [MLT-2

] newton (N)

6 Work or energy [ML2T

-2] joule (J)

7 Power [ML2T

-3] J s

-1 or watt

8 Pressure or stress [ML-1

T-2

] Nm-2

9 Linear momentum or Impulse [MLT-1

] kg ms-1

10 Density [ML-3

] kg m-3

11 Strain Dimensionless Unitless

12 Modulus of elasticity [ML-1

T-2

] Nm-2

13 Surface tension [MT-2

] Nm-1

14 Velocity gradient T-1

second-1

15 Coefficient of velocity [ML-1

T-1

] kg m-1

s-1

16 Gravitational constant [M-1

L3T

-2] Nm

2/kg

2

17 Moment of inertia [ML2] kg m

2

18 Angular velocity [T-1

] rad/s

19 Angular acceleration [T-2

] rad/S2

20 Angular momentum [ML2T

-1] kg m

2S

-1

21 Specific heat L2T

-2θ-1 kcal kg

-1K

-1

22 Latent heat [L2T

-2] kcal/kg

23 Planck’s constant ML2T

-1 J

-s

24 Universal gas constant [ML2T

-2θ-1] J/mol-K

Homogeneity Principle

If the dimensions of left hand side of an equation are equal to the dimensions of right hand side

of the equation, then the equation is dimensionally correct. This is known as homogeneity

principle.

Mathematically [LHS] = [RHS]

Applications of Dimensions

1. To check the accuracy of physical equations.

2. To change a physical quantity from one system of units to another system of units.

3. To obtain a relation between different physical quantities.

Significant Figures

In the measured value of a physical quantity, the number of digits about the correctness of

which we are sure plus the next doubtful digit, are called the significant figures.


5 | P a g e


Rules for Finding Significant Figures

1. All non-zeros digits are significant figures, e.g., 4362 m has 4 significant figures.

2. All zeros occuring between non-zero digits are significant figures, e.g., 1005 has 4

significant figures.

3. All zeros to the right of the last non-zero digit are not significant, e.g., 6250 has only 3

significant figures.

4. In a digit less than one, all zeros to the right of the decimal point and to the left of a non-

zero digit are not significant, e.g., 0.00325 has only 3 significant figures.

5. All zeros to the right of a non-zero digit in the decimal part are significant, e.g., 1.4750

has 5 significant figures.

Significant Figures in Algebric Operations

(i) In Addition or Subtraction In addition or subtraction of the numerical values the final result

should retain the least decimal place as in the various numerical values. e.g.,

If l1= 4.326 m and l2 = 1.50 m

Then, l1 + l2 = (4.326 + 1.50) m = 5.826 m

As l2 has measured upto two decimal places, therefore

l1 + l2 = 5.83 m

(ii) In Multiplication or Division In multiplication or division of the numerical values, the final

result should retain the least significant figures as the various numerical values. e.g., If length

1= 12.5 m and breadth b = 4.125 m.

Then, area A = l x b = 12.5 x 4.125 = 51.5625 m2

As l has only 3 significant figures, therefore

A= 51.6 m2

Rules of Rounding Off Significant Figures

1. If the digit to be dropped is less than 5, then the preceding digit is left unchanged. e.g.,

1.54 is rounded off to 1.5.

2. If the digit to be dropped is greater than 5, then the preceding digit is raised by one. e.g.,


3. If the digit to be dropped is 5 followed by digit other than zero, then the preceding digit

is raised by one. e.g., 3.55 is rounded off to 3.6.

4. If the digit to be dropped is 5 or 5 followed by zeros, then the preceding digit is raised by

one, if it is odd and left unchanged if it is even. e.g., 3.750 is rounded off to 3.8 and



6 | P a g e


Error

The lack in accuracy in the measurement due to the limit of accuracy of the instrument or due

to any other cause is called an error.

1. Absolute Error

The difference between the true value and the measured value of a quantity is called absolute

error.

If a1 , a2, a3 ,…, an are the measured values of any quantity a in an experiment performed n

times, then the arithmetic mean of these values is called the true value (am) of the quantity.

The absolute error in measured values is given by

Δa1 = am – a1

Δa2 = am – a1

………….

Δam = Δam – Δan

2. Mean Absolute Error

The arithmetic mean of the magnitude of absolute errors in all the measurement is called mean

absolute error.

3. Relative Error The ratio of mean absolute error to the true value is called relative

4. Percentage Error The relative error expressed in percentage is called percentage error.


7 | P a g e


Propagation of Error

(i) Error in Addition or Subtraction Let x = a + b or x = a – b

If the measured values of two quantities a and b are (a ± Δa and (b ± Δb), then maximum absolute error in their addition or subtraction.

Δx = ±(Δa + Δb)

(ii) Error in Multiplication or Division Let x = a x b or x = (a/b).

If the measured values of a and b are (a ± Δa) and (b ± Δb), then maximum relative error


HOME WORK

SUBJECT-ENGLISH

DATED-30-04-2020 CLASS-XI

कक्षा 11 हहिंदी गृहकार्य 30 अप्रलै

बच्चोआउए,अभिव्यभि और माध्र्म को ही आगे बढाते हैं - समाचार पत्र और पभत्रकाएिं जनसिंचार की सबसे मजबूत कडी ह ैपत्र पभत्रकाएिं र्ा हप्रिंट मीभिर्ा .बीसेक साल पहले जब चैनल्स आए तो कहा गर्ा अब हप्रिंट मीभिर्ा के ददन लद गए समझो ,मगर समर् ने वो बात झूठी साभबत कर दी .हप्रिंट मीभिर्ा का म७त्व बना हुआ ह ै.खबरें हप्रिंट मीभिर्ा के जररर्े ही पहुिंचाई जाती थी और इसे ही पत्रकाररता कहा जाता था.इसके तीन पहलू हैं ' समाचारों को सिंकभलत करना सिंपाददत कर छपने लार्क बनाना पत्र र्ा पभत्रका के रूप में छाप कर पाठक तक पहुिंचाना.हालािंदक र्े तीनो काम आपस में जुड ेहैं ,मगर पहले दो कीम पत्रकाररता के अिंतगयत आते हैं .तीसरी काम प्रकाशन औरभवतरण का हजैो तकनीकी और प्रबिंधकीर् भविागों के अिंतगयत आता ह ै. खबर लाने का काम सिंवाददाता करते हैं .इन खबरों ,लेखों,फीचरों को व्यवभथथत करनरे्ाभन सिंपाददत करन ेका कामसिंपादकीर् भविाग में काम करनेवाले सिंपादक मिंिल का होता ह.ैर्ही लोग तर् करते हैं कौन सी खबर छपेगी,और कहािं छपेगी ,दकतने आकार में छपेगी ?कोई िी घटना समाचार बन सकती ह ैअगर उसे पाठक पझ़नी र्ा उसके बारे में जानना चाह े,सावयजभनक भहत उससे जुडा हो .दभुनर्ा में पत्रकाररता 4 सौ साल पहल ेआई मगर िारत में इसकी शुरुआत 1780 में जेम्स ऑगथटने की .इन्होंने " बिंगाल गजट " पत्र बिंगाल से भनकाला . हहिंदी का पहला साप्ताभहक पत्र था " उदिंत मातंि "र्ह पत्र िी कोलकाता स ेही भनकला ,और इसके जन्मदाता थे पिं. जगलदकशोर शुक्ल .इसी क्रम में िारतेंद ुहररश्चिंद्र का नाम िी बड ेआदर

से भलर्ा जाता ह.ैक्र्ोंदक इन्हों ने कई पत्र पभत्रकाएिं भनकाली थीं आजादी के आिंदलेन में पत्र पभत्रकाओं ने महत्वपूणय िूभमका भनिाई ,इनमें कई मबत्वपूणय हथताक्षर थे - गणेश शमकर भवद्याथी,माखनलाल चतुवेदी,महावीर प्रसाद भिवेदी,प्रतापनारार्ण भमश्र,भशवपूजन सहार्,आददउस समर् की महत्वपूणय पभत्रकाओं,पत्रों में -केसरी,हहिंदथुतान,हिंस कबीर,आज ,प्रताप,भवशाल,प्रदीप,कमयवीर आद प्रमुख थे.जहािं आजादी के पहले पत्रकाररता का लक्ष्र् आजादी पाने मेम र्ोगदान दनेा था ,वहीं आजादी प्राभप्त के बाद र्े बदलना ही था .कुछ लोग कहने लगे हैं आजादी के बाद पत्रकाररता व्यवसार् बन गई ह.ैआजादी के बाद अभधकािंश पत्र पभत्रकाएिं बिंद हो ८ईं और नए पत्र पभत्रकाएिं नुकलने लगे .इनमें प्रमुख हैं - नविारत टाइम्स,जनसत्ता,दभैनक जागरण,पिंजाब केसरी,दभैनक िाथकर,अमर उजाला आदद . पभत्रकाओं में -धमयर्ुग,आउटलुक,इिंभिर्ा टुि े,ददनमान ,साप्ताभहक हहिंदथुतान आदद. आप प्रर्ास करें बेटा प्रश्न बनाने और उनके उत्तर चनुने की कुछ कल आगे बढाएिंगे.तबतक के भलए नमथते ...

Documents

Class -11th Subject-Chemistry Date -30/04/2020 Chapter