MODERN B.P PUBLIC SCHOOL FARIDABAD
SUMMER BREAK HOMEWORK OF CLASS X SCIENCE
Q.1
Q.2
Q.3
Q.4
Q.5
Q.6
Q.7
Q.8
Q.9
Given an example of decomposition reaction. Describe an activity to illustrate
such a reaction by heating?
When a green compound is heated strongly, its colour changes to black and odour
of burning sulphur is given out?
a) Name the compound.
b) State the type of reaction.
c) Write the chemical equation involved.
“Oxidation and reduction processes occur simultaneously.” Justify this statement
with the help of an example?
Balance the following chemical reactions:
i. KMnO4 (aq) + HCI (aq) →KCI (aq) + MnCl2 (aq) + Cl2 (g) + H2O
ii. CaCl2 (aq) + K3PO4 (aq) →Ca3 (Po4)2 (S) + KCI (aq)
iii. NaOH (aq) + H2SO4 (aq) →Na2SO4 (aq) + H2O (l)
iv. K (S) + O2 (g) →K2O (S)
v. CaCo3 (S) + HCI (aq) →CaCl2 (S) + H2O (l) + CO2 (g)
vi. AL (S) + HCI (aq) → ALCL3 (S) + CL2 (g)
(a) Define Corrosion.
(b) What is the name given to the corrosion of iron?
(c) What is the colour of coating formed on silver and copper?
(d) What damage is caused by corrosion?
(e) How can we prevent corrosion?
(i) Account for the following:
a) White silver chloride turns grey in sunlight.
b) Brown coloured copper powder on heating in air turns into black coloured
substance?
(ii) What do you meant by:
a) Displacement reaction?
b) Combination reaction?
Write the chemical formula of washing soda. How may it be obtained from
baking soda?
Name an industrial use of washing soda.
How is bleaching powder prepared? Why does bleaching powder-----------?
a) Smell strongly of chlorine?
b) Not dissolve completely in water?
A compound x of sodium is commonly used for making crispy pakoras. It is also
used for curing acidity in the stomach. Identify x. Write its formula and its
chemical name. State the reaction that takes places when it is heated?
Q.10
A student dropped a few pieces of marble in dilute hydrochloric acid, contained in
a test tube, the evolved gas was then passed for a long time water. What changes
would be observed in line water? Write balanced equation for both the changes
observed.
Q.11
What is water of crystallization? Write the common name and chemical formula
of commercially is this compound obtained? Write the chemical equation also.
List any two uses of this compound?
Q.12
“Bile juice do not contain any enzyme but is essential for digestion”. Justify the
statement.
Q.13
Differentiate between anteries, veins and capillaries?
Q.14
Give reason for the following:
a) The muscular walls of ventricles and thicker than the walls of atria.
b) Anteries have thick elastic walls.
c) Veins have values.
Q.15
Describe the working of artificial kidney?
Q.16
How can Ohm’s law be verified experimentally? Does it hold good under all
condition? Comment.
Q.17
An electric iron has a rating of 750 w, 220 v. calculate.
i.
Current passing through it, and
ii.
Its resistance, when in use.
Q.18
(i) Draw a schematic diagram of a circuit consisting of a battery of five 2 v cells, a
5Ω
resistor and a plug key all connected in series.
(ii) Calculate the electric current passing through the above circuit when the key
is closed.
Q.19
Find the equivalent resistance across the two ends A and B of the circuit.
Ω
1
A
1Ω
B
1Ω
1Ω
.
Q.20
10 v
In a household 5 tube lights of 40 w each are used for 5 hours and an electric
press of 500 w for 4 hours every day. Calculate the total electrical energy
consumed by the tube lights and press in month of 30 days?
Q.21
What is heating effect current. Find an expression for amount of heat produced.
Name some appliances based on heating effect of current.
SUMMER BREAK HOMEWORK OF CLASS X SOCIAL SCIENCE
1.
I.
a)
b)
II.
c)
III.
d)
IV.
e)
f)
g)
h)
2.
Make an atlas of the following topics using scrap book of coloured pages.
On the physical map of the world
Continents
Oceans
On the political map of the world locate & label the following countriesFrance, Germany, Italy, US.A, U.K, India, China, Japan & Russia.
On the physical map of India.
Neighbouring Countries
On the political map of India
Indian states with their capital
Type of soil
National parks
Wild life & bird sanctuaries.
As you know due to excess use of water we are facing the problem of water scarcity
everywhere in India. There is a need of hour to create awareness among people about
water harvesting. so make a project about ‘Water harvesting’ and also explain how is it a
good measure in over coming shortage of water with the help of examples of the Ralegaon
Siddhi and also explain what efforts do you think helped the people of the Ralegaon
Siddhi village in Ahmednagar to overcome the problems of drought?
SUMMER BREAK HOMEWORK OF CLASS X MATHS
1. Use Euclid’s division algorithm to find the Hcf of 4052 and 12576.
2. Show that any positive odd integer is of the form 6q+1 or 6q+3 or 6q+5, where q is some
integer.
3. Check whether 6n can end with the digit 0 for any natural number n.
4. Given that Hcf (306, 657) = 9 find LCM (306, 657)
5. Prove that 3+2√5 is irrational.
6. Without actually performing the long division, state whether the following rational
numbers will have a terminating decimal expansion or a non – terminating repeating
decimal expansion.
i.
ii.
iii.
iv.
129
22 57 75
23
23 52
29
243
77
210
7. Explain why 7× 11 × 13 + 13 and 7× 6 × 5 × 4 × 3 × 2 × 1 + 5 are composite.
8. Find the zeroes of polynomial of quadratic polynomial x2+7x+10 and verify the
relationship between the zeroes and the coefficient.
9. Find a quadratic polynominal the sum and product of whose zeroes are -3 and 2
respectively.
10. Find all the zeroes of 2x4 – 3x3 – 3x2 + 6x-2 if you know that two of its zeroes are √2 and
- √2.
5
5
11. Obtain all other zeroes of 3x4 +6x3 -2x2 -10x – 5 if two of its zeroes are √3 and - √3 .
12. Divide 3x3 +x2 + 2x + 5 by 1+ 2x +x2
13. Divide 3x2 – x3 – 3x + 5 by x– 1 – x2 and verify the division algorithm.
14. The cost of 2 kg of apples and 1 kg of grapes on a day was found to be Rs.160. After a
month, the cost of 4 kg of apples and 2kg of grapes is Rs.300. Represent the situation
algebraically and geometrically.
15. Half the perimeter of a rectangular garden. Whose length is 4m more than its width, is
36m. Find the dimensions of the garden.
16. Five years hence, the age of Jacob will be three times that of his son. Five years ago,
Jacob age was seven times that of his son. What are their present age?
17. The sum of two – digit number and the number obtained by reversing the digits is 66. If
the digit of the number differ by 2 , find the number. How many such numbers are there?
18. The area of a rectangle gets reduced by 9square units if its length is reduced by 5 units
and breadth is increased by 3 units. If we increase the length by 3 units and the breadth
by 2 units, the area increases by 67 square units. Find the dimensions of the rectangle.
19. A boat goes 30 km upstream and 44km downstream in 10 hours. In 13 hours it can go 40
km upstream and 55 km downstream. Determine the speed of the stream and that of the
boat in still water.
20. Solve the following of equations by reducing them of pair of linear equations.
i.
ii.
1
3𝑥+𝑦
1
1
3
+ 3𝑥−𝑦 =4
2(3𝑥+𝑦)
1
- 2(3𝑥−4) =
−1
8
21. Do activities in lab manual.
Activity No.
3
5
6
13
16
Page No.
14
18
20
40
44
SUMMER BREAK HOMEWORK OF CLASS X ENGLISH
 Article
 Importance of Education
 Importance of Yoga
 Cleanliness
 How I spent my summer vacation
 Letter to the Editor
 For the increasing number of accidents due to Reckless driving
 For the Importance of Girl Education
 For the Importance of Cleanliness
 Complete the following stories:
 Last evening I ____________________________.
 It was cold and dark________________________.
 Once there was a ___________________________.
 Learn all chapters which we have done in class.
 Students have to buy a 10 Rs. Notebook and do it all in notebook.