This is not the document you are looking for? Use the search form below to find more!

Report home > Education

Sample Papers For Physics Cbse Board

0.00 (0 votes)
Document Description
1. Give the molecular formula and IUPAC name of a carboxylic acid used as a preservative. Ans: Ethanoic acid, CH3COOH 2. The ciliary muscles of a normal eye are in their : (i) most relaxed (ii) Most contracted state. In which of the two cases is the focal length of the eye lens more? Ans: The focal length of eye lens is more when the ciliary muscles of a normal eye are in their most relaxed state 3. (a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements? If yes, write the similarity. Ans: (a) Yes. The atoms of all the three elements lithium, sodium, and potassium have one electron in their outermost shell. (b) Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet in its K shell, while neon has an octet in its L shell. (b) Helium is a non-reactive gas and neon is a gas of extremely low reactivity. What , if anything, do their atoms have in common?
File Details
  • Added: April, 26th 2012
  • Reads: 156
  • Downloads: 0
  • File size: 168.68kb
  • Pages: 3
  • Tags: sample papers for physics cbse board, cbse board sample papers for psychology, sample papers for english core cbse board
  • content preview
Submitter
  • Username: edurite
  • Name: edurite
  • Documents: 196
Embed Code:

Add New Comment




Related Documents

Sample Papers For Sociology Cbse Board

by: edurite, 3 pages

Sociology, as a subject, at the CBSE Class 12 stage is introduced to help learners reflect on what they hear and see in the course of everyday life and develop a constructive attitude towards the ...

Sample Papers For Psychology CBSE Board

by: edurite, 3 pages

CBSE Board or the Central Board of Secondary Education is the examination board that allowed for the school level education in India to a different level. Its history can be traced back to the ...

Sample Papers For Science Cbse Board

by: edurite, 3 pages

Sample papers are the best tools to evaluate student's performance before he/she goes to actual battlefield of examination. The CBSE sample papers are designed according to the content wise marks ...

Cbse Board Sample Papers For Physics

by: edurite, 3 pages

The Central Board of Secondary Education organizes class 10th exams, which are also known as All India Secondary School Examination. Approximately 9,689 schools are affiliated to CBSE and every year ...

Sample Papers For Entrepreneurship Cbse Board

by: edurite, 3 pages

CBSE has introduced the CBSE Entrepreneurship syllabus for the student so that they will come to know about the topics they need to learn from CBSE official NCERT Books. CBSE has introduced number of ...

Sample Papers For Chemistry Cbse Board

by: edurite, 3 pages

State your observations when a clean magnesium strip is held in a Bunsen flame for some time. Name the products formed when zinc granules are treated with dilute sulphuric acid.What do you observe ...

Sample Papers For Physics Icse Board

by: edurit123, 3 pages

Q.1 (a) Write down the gravitational unit of force. How is it related to Newton? (b) A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power which the pump ...

Sample Papers For History Cbse Board

by: edurit123, 3 pages

Mention any two strategies that were used to increase agricultural production from the 6th century BCE onwards.Describe any two practices associated with the Chishti Silsila of the Sufis.State any ...

Cbse Board Sample Papers For Psychology

by: edurite, 3 pages

Psychology is a branch of science which deals with the study of the functioning of brain and the understanding of the behavior of the individuals as to how it is governed by the functioning of the ...

Sample Papers For Sociology Icse Board

by: edurit123, 3 pages

What actually is sociology; it is that branch of social sciences which aims at developing knowledge about the human social activity and the human societies. Given below is the syllabus for the 2010 ...

Content Preview
Sample Papers For Physics Cbse Board
Sample Papers For Physics Cbse Board
1. Give the molecular formula and IUPAC name of a carboxylic acid used as a preservative.
Ans: Ethanoic acid, CH3COOH
2. The ciliary muscles of a normal eye are in their : (i) most relaxed (ii) Most contracted state. In which of
the two cases is the focal length of the eye lens more?
Ans: The focal length of eye lens is more when the ciliary muscles of a normal eye are in their most
relaxed state
3. (a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any
similarity in the atoms of these elements? If yes, write the similarity.
Ans: (a) Yes. The atoms of all the three elements lithium, sodium, and potassium have one electron in
their outermost shell.
(b) Both helium (He) and neon (Ne) have filled outermost shells. Helium has a duplet in its K shell, while
neon has an octet in its L shell.
(b) Helium is a non-reactive gas and neon is a gas of extremely low reactivity. What , if anything, do their
atoms have in common?
Read More About:- Cbse Board Sample Papers For Psychology


Boards.Edurite.com
Page : 1/3

4. Consider the following elements: Na, Ca, Al, K, Mg, and Li.
(i) Which of these elements belong to the 3 rd period of the Modern Periodic Table?
(ii) Which of these elements belong to Group 1 of Modern Periodic Table?
Ans: 5. (i) Elements which belong to the 3rd period of the Modern Periodic Table: Na, Mg, Al. 1
(ii) Elements which belong to Group 1 of Modern Periodic Table are: Li, Na, K.
6. (a) Why do stars twinkle whereas planets do not twinkle?
(b) What is meant by far point?
Ans: (a) Stars are very far from us and light rays cover large distances. Layers of air un evenly sprayed
so due to atmospheric refraction light rays scattered more and give the twinkling effect whereas planets
being much closer to the earth the amount of light entering our eyes scattered less and do not twinkle.
(b) The maximum distance up to which a normal eye can see clearly is called the far point of the eye.
( infinity)
7. (i) Define power of a lens and write its S.I. Unit.
(ii) The image of an object formed by a convex lens is of the same size as the object. If the image is
formed at a distance of 50 cm from the lens, at what distance from the lens is the object placed? Find the
focal length and power of the lens used.
Ans: (i) Power of a lens is defined as the reciprocal of the focal length. It's S.I. Unit is dioptre.
(ii) v = + 50 cm Size of image = size of object
Know More About:- Sample Papers For English Core Cbse Board


Boards.Edurite.com
Page : 2/3

ThankYou
Edurite.com



Document Outline

  • ﾿

Download
Sample Papers For Physics Cbse Board

 

 

Your download will begin in a moment.
If it doesn't, click here to try again.

Share Sample Papers For Physics Cbse Board to:

Insert your wordpress URL:

example:

http://myblog.wordpress.com/
or
http://myblog.com/

Share Sample Papers For Physics Cbse Board as:

From:

To:

Share Sample Papers For Physics Cbse Board.

Enter two words as shown below. If you cannot read the words, click the refresh icon.

loading

Share Sample Papers For Physics Cbse Board as:

Copy html code above and paste to your web page.

loading