XII (Pg. 1)

XII (Pg. 2)

CLASS XII

English Do BBC Compacta Worksheets – 37 to 107.

Accountancy Prepare comprehensive project as per the guidelines given.

Business Studies Prepare the project file on the given topic as per the guidelines.

Note: Keep checking the snap homework for the assignment.

Chemistry Note:- Do the following questions in your fair notebook.

1. Why does the electrical conductivity of semiconductors increase with

the rise in temperature?

2. A sample of ferrous oxide has actual formula Fe0.93 O1.0. In this

sample, what fraction and percentage of metal ions are Fe+2 ions?

What type of non-stoichiometric defect is present in this sample?

3. Give reasons why

a) Phosphorus doped silicon is a semiconductor.

b) Schottky defect lowers the density of a solid.

c) Some of the very old glass objects appear slightly milky instead

of being transparent.

4. What is meant by Reverse Osmosis ?

5. Which one has the highest freezing point:-

a) 1m glucose c) 1 ml CaCl2

b) 1m NaCl. d) 1 m AlF3

6. A 10% solution of Urea is isotonic with 20% solution of „x‟ at the

same temperature. Calculate the molecular weight of „x‟.

7. A person suffering from high blood pressure should take less salt

why?

8. How is vapour pressure of solvent affected when a non-volatile solute

is dissolved in it.

9. Can E°cell or ΔG° for a cell reaction ever be equal to zero? why?

10. HCl does not give acidic solution in Benzene why?

11. The standard electrode potential(E°) for Daniel cell is +1.1V.

Calculate ΔG° for the reaction.

XII (Pg. 3)

12. Calculate EMF of the following cell at 25°C:-

s

2 Pt1bargH20.01MH0.001MFeFe

0.44V/FeFeE 2 0.00V/HHE 2

Physics 1. Complete N.C.E.R.T. exercises and examples from L 1 to 4 in numerical

note book.

2. Write practical file as per instruction given in class.

3. Make a working model as per instruction given in class. Also write

project report.

4. Revise entire syllabus done in class.

MATHEMATICS

Q1. Differentiate the following:

(i)

2x

x1

51

2.5siny

(ii)

13

x-1125xsiny

21

(iii)

22

221

x-1x-1

x-1x-1tany

(iv)

sinx1

cosxtany 1

(v)

22

221

x-1x1

x-1x1tany

Q2. If xxxy find

dk

dx

Q3. If y = logx.....logx

logx find dx

dy

Q4. If

2

1-

t1

2tsiny and

2

21-

t1

t-1cosx find

2

2

dx

yd

XII (Pg. 4)

Q5. If

bxa

xlogx y then show that

2

2

23 y

dx

dyx

dx

ydx

Q6. If x taney 1x then prove that 0yx1dx

dyxx12

dx

ydx1

22

2

22

Q7. If

0xx

sin x-tan x

0x2

1xΠsin a

f(x)

3

Find values of a if f(x) is continuous at x=0.

Q8. Using properties of determinants prove that

8

2x1xx

1xx1x

x1x2x

222

222

222

Q9. Using properties of determinant show that

czzz

ybyy

xxax

= abc

c

z

b

y

a

x1 =(abc + xbc + yca + zab)

Q10. Using properties of determinants prove that

b

acbb

aa

cba

ccba

22

22

22

c

= 4abc

ECONOMICS

Answer the following questions in Economics register:

TOPIC : DEMAND

UNDERSTANDING BASED QUESTIONS:

1. Name the factors determining market demand.

2. What will be the effect of increase in number of buyers on demand curve of a good?

3. How is market demand curve derived?

5. State causes of rightward shift in demand curve.

XII (Pg. 5)

6. Goods X and Y are substitutes. Explain the effect of fall in price of Y on demand for X.

HIGHER ORDER THINKING SKILLS QUESTIONS:

1. Why is demand curve for a normal good downward sloping? Explain using utility

analysis (equilibrium condition).

2. When does a consumer buy more of a commodity at a given price? Give three reasons.

3. When does a consumer buy less of a commodity at a given price? Give three reasons.

4. A good is an inferior good for one and at the same time normal good for another

consumer. Do you agree? Explain with the help of an example.

MULTI DISCIPLINARY QUESTIONS (Including Application Based & Value Based

Questions)

1. Ceteris Paribus, If the government provides subsidies on electricity bills, what would be

the likely change in the market demand of desert coolers?

2. Explain the effect of the following on the demand of a given good, Use diagram

i) A rise in income of the consumer and the good is inferior.

ii) A rise in the price of complementary good

iii) A rise in the price of substitute good

3. Explain cross price effect for substitute goods using a numerical example.

4. Explain cross price effect for complementary goods using a numerical example.

5. Explain income effect using examples.

6. What policy measures can the government undertake to increase the demand of milk in

the country? Mention any one.

TOPIC: PRICE ELASTICITY OF DEMAND

APPLICATION BASED QUESTIONS:

1. What will be the effect of 10 percent rise in price of a good on its demand if price

elasticity of demand is a)zero b) -1 c) -2

2. A 5% rise in price of good X leads to a 10% fall in its demand. A consumer buys 100

units of good Y, when its price is rupees 5 per unit. At what price will the consumer buy

120 units of good Y if the ratio of price elasticity of demand for good X and Y is 2:1?

3. A consumer spends Re. 400 on a good priced at Re. 8 per unit. When its price rises by

25% the consumer spends Re. 500 on the good. Calculate the price elasticity of demand

by proportionate method.

4. A consumer buys 10 units of a good at a price of Re. 9 per unit. At a price of Re.10 per

unit he buys 19 units. What is the price elasticity of demand?

XII (Pg. 6)

5. How does proportion of income spent on the good affect the price elasticity of

demand?

HOTS QUESTIONS:

1. The demand for a good doubles due to a 25% fall in price. Calculate price elasticity

of demand.

2. Demand for a good is unitary elastic .The quantity demanded of this good at a price

of Re. 10 is 80 units. How much quantity will be demanded when the price rises by

20%?

3. How does availability of substitutes affect price elasticity of demand?

4. When price of a good decreases to 1

4th of the original price ,its demand increases 3

times more. What will be its price elasticity of demand? Calculate.

5. Market demand for a good at Re.4 per unit is 1000 units. The price rises . As a

result, the market demand falls by 25%.Find the new price if demand is unit elastic.

6. When the price of a good is halved, its demand rises from 120 to 150 units.

Calculate its price elasticity of demand.

IMPORTANT NOTE: Students also complete assignments given earlier in the class.

INFORMATION PRACTICES

NOTE : kindly do the questions in computer notebook & practical assignments in

practical file.

DATABASE CONNECTIVITY TO MYSQL

TYPE A: VERY SHORT ANSWER QUESTION

1. Define ODBC and JDBC?

2. What is a connection?

3. What does Class.forName() ?

4. What is result set?

5. What does DriverManager do?

6. Which methods are used to execute SQL queries?

7. Write a statement to register driver com.mysql.jdbc.Driver with DriverManager?

8. Name the methods for the following?

(a) to fetch an integer value from the resultset.

(b) to fetch a float value from a resultset.

(c) To fetch a date value from the resultset

(d) To fetch a String value from the resultset.

9. Which package must be import to implement database connection?

XII (Pg. 7)

10. Name the methods for the following?

(e) to move cursor forward by one row in a resultset.

(f) to place the cursor to first row in a result set.

(g) to add a record in a resultset.

(h) to delete a record from a resultset.

(i) to place the cursor to next 3rd

record from current position in the cursor.

(j) To get the number of records in the cursor.

TYPE B: SHORT ANSWER QUESTION

1. What all task are performed using JDBC ?

2. What is following code doing ?

Str db = joptionpane.showiputdialog (null, “Enter name of urmysql database…”) ;

Str db_url = “jdbc:mysql://localhost/”+db ;

Class.forname(“com.mysql.jdbc.driver”) ;

Connection con = Drivemanager.getconnection(db_url,”root”, “ “);

3. What are steps to connect to a database from with java application?

4. What is difference between executeQuery() and executeUpdate() method.?

5. Write code to a mysql database namely school and then fetch all those records from table student

where grade is “A”.

6. Find errors in the following code :

Import java.sql* ;

:connection conn =

DriveManager.getconnention(“jdbc:mysql://localhost/test”,”root”,”wxyz);

Statement stmt = con.createstatement();

Sql= “SELECT empno,emame,job,sal From EMPL; “ ;

Resultsetrs = stmt.executeQuery(sql);

}

Catch(Exception e) { }

P R A C T I C A L – A S S I G N M E N T S

Experiment No. 1:

Objective: Understanding and use of variables of float and other data types. Task: Develop a simple Calculator application as per given screen snapshot, to implement

+, -, x and / operations. The text boxes get cleared when „C‟ button is clicked.

Experiment No. 2:

Objective: Understanding and use of Nested conditions in the Real life applications.

XII (Pg. 8)

Task: A Quick Fox Transport Co. wants to develop an application for calculating

amount based on distance and weight of goods. The charges (Amount) to be calculated as per rates given below.

Distance Weight Charges per Km.

>=500 Km >=100 kg. Rs. 5/-

>=10 and <100 kg. Rs. 6/-

< 10 kg. Rs. 7/-

<500 Km >=100 Kg. Rs.8/-

<100 Kg. Rs.5/-

Experiment No. 3:

Objective: Understanding the use of loops and mathematical operations. Task: Develop an application to compute the sum of digits for given number.

Experiment No. 4:

Objective: Understanding and developing a logic to solve a problem. Use of nested loops and

breaking it prematurely. Task: Develop a Prime Number Generator Application which generates Prime

numbers for given range. Prime numbers are those numbers which are divisible

by one or itself only.

XII (Pg. 9)

Experiment No. 5:

Objective: Displaying images on a Label and Text Area control. Task: Develop an e-Learning application with images and text information as per given

screen shot.

Experiment No. 6:

Objective: Use of Slider or Scroll bar control to get user input and using it some calculation. Task: Develop a Temperature Converter application which converts selected Celsius

temperature on a scale and displays it equivalent Fahrenheit temperature.

XII (Pg. 10)

Experiment No. 7:

Objective: Understanding and using the Radio Button in Real-life application to determine the

selection of choices and calculations accordingly. Task: The Entertainment Paradise- A theater in Delhi wants to develop a computerized

Booking System. The proposed Interface is given below. The theater offers different

types of seats. The Ticket rates are- Stalls- Rs. 625/-, Circle- Rs.750/-, Upper Class- Rs.850/- and Box- Rs.1000/-. A discount is given 10% of total amount if tickets are purchased on Cash. In case of credit card holders 5% discount is given.

Experiment No. 8:

Objective: Understanding the use of various controls in Real life application. Task: ABC Consultancy is a placement organization, assists job seekers. The Entry form has

to be designed to facilitate the Registration Process with following features. 1.When Submit button is pressed, the following things should happen.

(a) If Post Graduate is checked, the 10+2 and Graduate checkboxes should also

get selected automatically. (b) If Graduate is checked, the 10+2 checkboxes should also get selected. (c) A Message Box with “Hello Mr. ….. you are registered” or “Hello Miss… ….. you

are registered” as per Gender of candidate. 2. When Clear Button is pressed, all the text boxes, check boxes gets cleared, and

Male and Science option is selected by default.

XII (Pg. 11)

Experiment No. 9:

Objective: Understanding the need of Real life applications. Task: The Milton Casting Company has developed an application to calculate the wage of its

workers. The following functionalities are expected. 1. The Wage rate are Rs.150/- (per day) for male and Rs.130/- for females. 2. An additional amount Rs.50/- per day is paid if worker is skilled. 3. When Calculate Button is clicked the Total wage amount is calculated and

displayed in relevant Text box. 4. When Clear Button is clicked, all the text boxes get cleared and Male option is

selected.

Experiment No. 10:

Objective: Understanding the need of Real life applications. Task: The Fashion Gallery- a leading garments shop wants to develop an application to

calculate the discount Amount. The following functionalities are expected. 1. The discount is given on the basis on payment mode. Cash – 10%, Cheque – 8% and Credit – 5% of bill amount. If Bill amount is more than 10000 then additional 5% discount is also given.

XII (Pg. 12)

2. Initially, Calculate Net Amount is disabled, but when user click on Calculate

Discount button the discount amount is calculated and displayed, and Calculate

Net Amount Button is enabled.

3. When Calculate Net Amount is clicked the Net Amount is calculated and displayed

in Net Amount Text Box. 4. When Exit Button is clicked, a Confirm dialog appears and application is closed

only when Yes option in confirm dialog is selected.