Saturday, May 9, 2009

SCIENCE SET 3 CBSE X 2010 QUESTION GUESS PAPER

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Clever Monkey's
CBSE X SCIENCE IMPORTANT QUESTIONS /GUESS PAPER FOR 2010 SET-3
Clever Monkey`s CBSE X SCIENCE QUESTION 3-1
What are metalloids?
Clever Monkey`s CBSE X SCIENCE QUESTION 3-2
Tap water conducts electricity whereas distilled water does not. Why?
Clever Monkey`s CBSE X SCIENCE QUESTION 3-3
Give the names of the following functional groups:
a. –OH
b. –COOH
Clever Monkey`s CBSE X SCIENCE QUESTION 3-4
Two thin lenses of power +5.0 Dand -7.5 D are kept in contact with each other. Find the power and focal length of this lens combination.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-5
An electic iron has a rating of 750 W, 220 V. Calculate
a. Current passing through it
b. Its resistance, when in use.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--6
What is the constituents of bronze?
Write its two main uses. Name the common constituent of brass and bronze.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-7
Give reasons for the following:
a. Oxidation of ethanol with CrO3 produces ethanal while ethanol when oxidized with alkaline KMnO4 produces ethanoic acid.
b. Alcohol supplied for industrial purposes is mixed with copper sulphate.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-8
What is the focal length of a plane mirror?
Clever Monkey`s CBSE X SCIENCE QUESTION 3-9
How will you use a solenoid to magnetise a steel bar?
Clever Monkey`s CBSE X SCIENCE QUESTION 3-10
What is the S.I. unit of electric potential?
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Clever Monkey`s CBSE X SCIENCE QUESTION 3-11
Describe the construction and working of the human eye with the help of a labelled diagram.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-12
Explain with the help of a labeled ray diagram, the defect of vision called myopia and how it is corrected by a lens.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-13
a. Write the common name of ethanol
b. Name the substances in which ethanol is an important constituent
c. What happens when ethanol is heated in 443K with excess of concentrated sulphuric acid.
d. What happens when sodium reacts with ethanol?
e. Write two uses of ethanol.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-14
a.. Write the formula for the given compounds and name the functional groups present in each of them:
i. Ethanoic acid
ii. Propanone
iii. Nitromethane
b. Describe with chemical equations how ethanoic acid may be obtained from ethanol and methanol
Clever Monkey`s CBSE X SCIENCE QUESTION 3--15
a. What is meant by ‘Electric Resistance’ of a conductor?
b A wire of length L and resistance R is stretched so that its length is doubled and the area of cross-section is halved. How will its:
i. resistance change?
ii. resistivity change?
Clever Monkey`s CBSE X SCIENCE QUESTION 3-16
Draw the pattern of lines of force due to magnetic field associated with a current carrying circular coil. State how the magnetic field produces depends on
a. The current passing through the conductor
b. The number of turns of wire in the coil
c. The radius of the coil.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-17
Name the raw materials that are required for the manufacture of washing soda by Salvay process. Describe the chemical reactions involved in the process.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-18
What are double displacement reaction? Give an example.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-19
Draw the internal structure of the heart and explain how blood flows through the heart.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-20
Draw the structure of a neuron and explain its function.
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Clever Monkey`s CBSE X SCIENCE QUESTION 3-21
Differentiate between ‘self-pollination’ and ‘cross pollination’. Describe ‘double fertilization’ in plants.
Clever Monkey`s CBSE X SCIENCE QUESTION 3-22
Suggest three ways to maintain a balance between environment and development to survive.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--23
Differentiate between renewable and non-renewable sources of energy. Give two examples for each.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--24
What is a nuclear chain reaction? Give an example to illustrate it.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--25
Show a diagram to show the structure of a flower
Clever Monkey`s CBSE X SCIENCE QUESTION 3--26
Differentiate between homologous and analogous organs. Give one example of each.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--27
Describe the mechanism of blood clotting
Clever Monkey`s CBSE X SCIENCE QUESTION 3--28
Name any two non-biodegradable wastes.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--29
List two functions performed by ovaries in a human female.
Clever Monkey`s CBSE X SCIENCE QUESTION 3--30
Name the two stages of photosynthesis.
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Green Tea & Weight Loss
Is PEANUT BUTTER good?
Is Diet Coke Dangerous?
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SHOW TO YOUR CHILDREN
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Octopus has 3 hearts
COMEDY
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Make Police Complaints at SaferIndia.com
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History of CBSE

What is the meaning of CBSE:The Central Board of Secondary Education is an eminent board of school education in India. The CBSE prepares the syllabus for Class 9 to Class 12 in schools affiliated with it. It conducts two major examinations every year, the All India Secondary School Examination (AISSE) for Class 10 and the All India Senior School Certificate Examination (AISSCE) for Class 12, which is a school-leaving examination. Many private schools within and outside India are affiliated to CBSE. The medium for education prescribed by CBSE is either English or Hindi. The CBSE also conducts the All India Engineering Entrance Examination (AIEEE) which is a common entrance examination conducted on all-India basis for admission to engineering and architecture/planning programmes in the country. Similarly Pre-medical and Pre-dental Tests AIPMT (PMT/PDT) are conducted for medical and dental colleges. Syllabus and methodology of CBSE makes it much convenient for students to opt for pure sciences, medicines, engineerings and IIT. Most successful students of competitive examinations,IITJEE, KVPY, science olympiads, mathematics olympiads are nurtured at CBSE.
HISTORY OF CBSE:The "United Provinces Board of High School and Intermediate Education" was the first Board set up in 1921 with jurisdictions over Rajputana, Central India and Gwalior. The Government of India in 1929 suggested to set up a joint Board to expand the jurisdiction and renamed it the "Board of High School and Intermediate Education, Rajputana", which included Ajmer-Merwara. In 1952, as a result of the growth of State Universities and State Boards all over India, the constitution of Board was amended wherein its jurisdiction was extended to part-C and part-D territories and the Board was given its present name "Central Board of Secondary Education", it was in the year 1962 finally that the Board was reconstituted. There are a total of 10,011 schools in India, and outside India, affiliated to CBSE. As a result of the reconstruction, the Delhi Board of Secondary Education was merged with the Central Board and all the educational institutions recognised by the Delhi Board also became a part of the Central Board. The Board has grown from a group of 309 schools in 1962 to 10,011 schools as on date, which include 981 Kendriya Vidyalayas, 1381 Government Schools, 2486 Independent Schools, 355 Jawahar Navodaya Vidyalayas and 13 Adhoc Schools. There are also Indian schools in the Middle East and Southeast Asia that are affiliated to it.In most of countries Government of India employee's Children and Indian Embassy's children go to CBSE schools abroad generally called Indian Schools. In Japan Indian education under CBSE school has gained popularity. CBSE examinations for classes X and XII are conducted in the month of March and the first week of April. The results are declared in the last week of May mostly in 2-3 phases. These results can be seen on the official site. CBSE123.blogspot.com is mainly intended for 10 and 12 CBSE students. However, this can be used for Entrance exams like AIEEE. The CBSE questions are selected in such a way that if they are able to attend these questions, they will be confident of understanding the concepts. This site is purely an educational portal and here i am keeping CBSE sample papers and CBSE questions bank.CBSE Stands for Central Board of Secondary Education.