CBSE Board Papers for Class 12th
 

Can you give me the CBSE Board Papers for Class 12th??

Re: CBSE Board Papers for Class 12th
 

I do have CBSE Board Papers for Class 12th for the following subjects:

Accountancy
Business Studies
Biology
Chemistry
Computer science
Economics
English
Geography
Hindi
History
Information practices
Maths
Multimedia and Web Technology
Physics
Physical education
Psychology
Political science
Sociology

If you need any particular course paper then please let me know. Here I am uplaoidng the question paper of the biology subjects. I have taken following question from the attachment:

Q. 1. What prevents collapsing of our trachea during breathing? (1)
Q. 2. What advantage does the sea anemone get in the sea anemone-hermit crab facultative
mutualism? Give an alternative term for this kind of mutualism. (1)
Q. 3. Name the nitrogenous waste excreted in the larval and adult stages of frog respectively.(1)
Q. 4. In a wheat field, some broad-leaved weeds were found by a farmer. Which phytohormone can
be used to eradicate them? (1)
Q. 5. Correct the statement given below with respect to brazzein:
“Brazzein is a high calorie carbohydrate.”
SECTION - B
Q. 6. What is reverse osmosis? Give its one application. (2)
Q. 7. Which two heart sounds are heard through the stethoscope when placed on the chest? When
are these sounds produced respectively? (2)
Q. 8. How is polyspermy prevented in humans? (2)
Q. 9. Write the full form of ELISA? Give example of the clinical application of ELISA test. (2)
Q. 10. What is fermentation? Name any two organic compounds produced in this process. (2)
Or

Complete question paper is in the attachment click on it….