CBSE X Science Board Exam 2011

SET-A

Q1. Why is the colour of clear sky blue ?

Q2. Why are bacteria and fungi called decomposers ?

Q3. Why is decrease of ozone in our ozone layer a cause for our worry ?

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SET-B

Q1. How many covalent bonds are there in a molecule of ethane C2H6 ?

Q2. What is Tyndall effect ?

Q3. What will happenif we kill all the organisms in one trophic level ?

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SET-C

Q1. Draw the structure for ethanoic acid molecule, CH2COOH. ?

Q2. What is meant by biological magnification ?

Q3. Give an example of a phenomenon where Tyndall effect can be observed ?

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CBSE Class X Sample Papers

 

English Communicative -2011 English Language and Literature -2011 Maths -2011
Science -2011 S.S.T -2011 Foundation of IT -2011
2012 Board Exam Datesheet in India
Andhra Pradesh Board Date Sheet 2012 Kerala SSLC Exam Time Table 2012
Kerala HSC Exam Time Table 2012 Jharkhand Class 12th Board Exam 2012 Date Sheet
Jharkhand Class 10th Board Exam 2012 Date Sheet West Bengal Board 10th Class 2012 Exam Schedule
West Bengal Board 12th Class 2012 Exam Schedule UP Board High School Exam Schedule 2012
UP Board Intermediate Exam Schedule 2012 Bihar Board Exam Time Table for Matric (10th) 2012
Bihar Board Exam Time Table for Intermediate 2012 Tamil Nadu Board HSC Exam Timetable 2012
Tripura Board Date Sheet 2012 for Class 12th Tripura Board Date Sheet 2012 for Class 10th
Assam Board HSLC date Sheet 2012 AHSEC Higher Secondary Examination Date Sheet 2012
Manipur Board HSLC Timetable 2012 Rajasthan Board Class 10th Time Table 2012
Rajasthan Board Class 12th Time Table 2012 MPBSE High School Certificate Date Sheet 2012
MPBSE Higher Secondary Certificate Date Sheet 2012 HPBSE 10th Class Exam Date Sheet 2012
HPBSE 12th Class Exam Date Sheet 2012 Maharashtra Board HSC Time Table 2012
Maharashtra Board SSC Time Table 2012 Orissa Class 12th Date sheet 2012
CBSE Exams 2012 State Board Exams
Gujrat Exam Shedule 2012 Goa Board of Secondary & Higher Secondary Education
Karnataka Board of the Pre-University Education Meghalaya Board of School Education 2012
Punjab School Education Board 2012 Mizoram Board School Education 2012
Nagaland Board School Education 2012 Manipur Board Secondary Education 2012

Entrance Exams 2012

 

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