Cbse Science Practice Paper for class-10 (SA-II-2013)

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1.How is the sex of a new born determined genetically in humans?

2.State the cause of dispersion, when white light enters a glass prism. Explain with a diagram.

3.(a) Draw the structures for the following compounds. (i) 2- Bromopentane

 (ii) 2 – methyl-propane

(iii) Butanal

 (iv) 1 – Hexyne 

(b) Draw the electron dot structure for ethanoic acid. (c) Draw and explain the structure of the micelle. Which end of the micelle dissolves in dirt ?

4.(a) Write a test to distinguish between Ethanol and Ethanoic acid.

 (b) Draw electron dot structure of ethane.

 (c) Why do soaps form scum with hard water ?

5.A person can see distant sign boards clearly but cannot read clearly a book which is at 25 cm from his eye. Identify the defect. Draw a labelled ray diagram to illustrate how this defect can be corrected.

6.(a) Draw the longitudinal section of a flower and label the following parts. 

(i) stigma (ii) style (iii) anther (iv) ovary

 (b) Why are papaya flowers called unisexual ? 

(c) After fertilization in a flower, mention the structures that develop into the embryo and seed.

7.(a) Define power of a lens. 

(b) An object is kept at a distance of 18cm, 20cm, 22cm, and 30cm, from a lens of power +5D.

 (i) In which case or cases would you get a magnified image? 

(ii) Which of the magnified image can be got on a screen?

 (c) List two widely used applications of a convex lens.

8.(a) Define principal focus, focal length and principal axis of a lens.

 (b) Draw ray diagrams to show the principal focus of a (i) convex lens (ii) concave lens

9.(a) Give reasons :-
(i) Wind acts as a pollinating agent.
(ii) Variation is essential and beneficial to a species.
(iii) Use of condoms prevents pregnancy.
(b) Draw a neat diagram of human male reproductive system and label its four important
parts.

10.(a) In the male reproductive system, where is the organ that produces male germ cells situated ? Why?

 (b) Mention the role of prostate gland and seminal vesicles in the human male reproductive system. (c) How are the male and female germ cells produced in the human body different from each other ?

SCIENCE SUMMATIVE ASSESSMENT – II FOR CLASS-X

1. How does the Ozone layer of atmosphere protect the humans on earth ?
2. A student has difficulty in reading the blackboard while sitting in the last row. What could be the defect of vision the student is suffering from ? What are the causes for this disorder ?
3. How does the atomic radius change as we go (a) from left to right across a period ? (b) down a group in the periodic table ? 
4. What is reproduction ? Mention the importance of DNA copying in reproduction.
5. Describe the role of the following in human beings. (a) Ovary (b) Prostate gland 
6. The refractive index of a dense flint glass is 1.65 and for alcohol it is 1.36 with respect to air. Find the refractive index of dense flint glass with respect to alcohol.
7. Draw a ray diagram to show refraction of light through a triangular glass prism and show angle of incidence and angle of deviation.
8. A child has difficulty in reading the blackboard while sitting on the last bench in a classroom. What could be the defect the child is suffering from ? List two main causes of this defect.
9. List four stakeholders of forests.
10. What is water harvesting? Mention any two water harvesting structures.
11. (a) Give a chemical test to distinguish between saturated and unsaturated hydrocarbons. (b) Name the products formed when ethanol burns in air. List two forms of energy that are librated on burning ethanol. (c) Why is the reaction between methane and chlorine considered a substitution reaction?
12.  Draw the labelled longitudinal structure of a flower showing its parts.
13. Draw the ray diagram for the formation of image by a concave lens when the object is placed between the infinity and optical center of the lens.State the nature of the image formed.
14. Why do stars appear to twinkle while the planets do not ? Explain with the help of diagram. 
15. Explain with the help of diagram why the sun is visible to us two minutes before the actual sun-rise and two minutes after the sunset.
16. How are coal and petroleum formed ? Name two elements present in coal and petroleum in addition to carbon.
17. There are many advantages of water stored in the ground .State any two of them.
18. What are isomers ? State two properties of carbon which lead to the huge number of carbon compounds .                                                                                                                                                                           

SAMPLE PAPER SUMMATIVE ASSESSMENT – II (2013) ENGLISH LANGUAGE AND LITERATURE Class - X

SUMMATIVE ASSESSMENT – II (2013) ENGLISH LANGUAGE AND LITERATURE   Class - X
SAMPLE PAPER

Answer any three of the following questions in 40-50 words each :

1.                       Why did Max well keep an otter as a pet?
2.                      Why did the children eagerly wait for the baker?
3.                      Why did Rajvir visit Assam?
4.             Why did Ivan Lomov visit his neighbour Stephan Chubukov in                                 the play, “The              Proposal ? 
5.                     When would the baker come everyday ? Why did the children run to meet him ?
6.                    Write down the Buddhist legend about tea.
7.                   Why was the otter named Maxwells‟ otter ?
8.                     What did the Buddha ask the lady to do ?
9.                 Draw a pen picture of a Goan baker.
10.                 What idea of Coorg do you form ? What opportunities does Coorg offer to a tourist ?
11.                Draw a pen picture of tea gardens in Assam.
12.                What was Valli‟s deepest desire ? Find the words and phrases in the story that tell you this ? 

Answer the following question in about 80 words.
On what issues did Lomov and Natalya quarrel ?What does their quarrel reveal
about them ?
OR
How did Mijbil like the bathroom ? What experiment did he do there ?

   Answer the following question in about 80 words.

Narrate the narrator‟s first visit to New Mullion.

OR

Describe the role played by Mme Forestier in the story, „Necklace.‟

   Answer any two of the following questions in 40-50 words each.                                  

(a)                Why is Bholi‟s father worried about her ?

(b)                What guesses are made by Think-Tank about the books found on earth ?

(c)                What more does Bill say about Lutkin‟s mother ?

How  did  Gautam  Buddha  convince  Kisa  Gotami  to  cope  with  his  only  son‟s
death?
Answer the following question in about 80 words.
Why  did  Matilda‟s  husband  go  out  in  to  the  cold  night  minutes  after  returning
from the ball? Was he successful in his purpose?
	OR
On the basis of your understanding of the story, sketch the character of Bholi  and
describe the role the teacher played in her life?
Answer any two of the following questions in 40-50 words each :
(a)	Why did Think Tank send his crew on the earth?
(b)	Why do you think were the neighbours anxious to meet the lawyer?
(c)	Why did Richard Ebright start a project of tagging the butterflies?

Math Sample Questions :Solve Daily

Mathematics Question Paper For class 10 SA-2

1.                    A hemispherical bowl of internal radius 9 cm is full of with a liquid. This liquid is to be filled into cylindrical shaped bottles of diameter 3 cm and height 4 cm. How many bottles are necessary to empty the bowl ? 
2.          Find the point of trisection of the line segment joining the points (5,      6) and (    7, 5).
3.          Find two consecutive odd positive integers, sum of whose squares is 290.   
4.       Two concentric circles are of radii 6.5 cm and 2.5 cm. Find the length of chord of the   larger circle which is tangent to the smaller circle. 
5. A card is drawn from a well shuffled deck of 52 cards. Find the probability that it is not an ace.

CBSE Sample paper-2013

CBSE Sample paper-2013


CLASS: 10 CBSE SAMPLE PAPER FOR SA-II 2013 EXAMINATION
Subject: MATHEMATICS

Carry four marks each:
1. A two – digit number is such that the product of the digits is 35.
When 18 are added to this number, the digits interchange their places.
Determine the number.
2. The product of Tanya’s age (in years) five years ago and his age ten year later is 16.
Determine Tanya’s present age.
3. Prove that the tangents drawn to a circle from an external point are equal in length.
4. The difference of square of two numbers is 180. The square of the smaller number
is 8 times the large number. Find the two numbers.
5. From a station, two trains start at the same time. One train moves in west direction
and other in North direction. First train moves 5 km/hour faster than the second train.
If after two hours, distance between the two trains is 50 km, find the average speed
of each train.
6. Two water taps together can fill a tank in 2 hrs. The tap of smaller diameter takes
2 hours more than the larger one to fill the tank separately. Find the time in which
each tap can separately fill the tank. 11 12
7. In given figure, PQ is a chord of length 8 cm in a circle of radius 5 cm. The tangents
at P and Q intersect at a point T. Find the length of TP.

8. If the radii of the ends of a bucket 24 cm high are 5 cm and 15 cm, find the surface
area of the bucket provided it is closed from the smaller end.
9.             A card is drawn at random from well shuffled deck of playing cards. Find the probability that card drawn is :

(i)         a card of spade           (ii)        a red king.

10.       Two concentric circles are of radii 6.5 cm and 2.5 cm. Find the length of chord of the larger circle which is tangent to the smaller circle.