CBSE ADDA

1. Application Procedure:  The online submission of particulars may be made at website www.ctet.nic.in. The candidates should supply all the required details while filling up the online form. On submission of details, a Confirmation page with Registration No. shall be generated. Candidates are required to take printout of Confirmation page and paste photograph, sign in the space earmarked for the purpose. The confirmation Page is to be sent by Registered/Speed Post to CBSE (NOT BY COURIER) to " The Assistant Secretary (CTET Unit), Central Board of Secondary Education, 'Shiksha Sadan', 17, Rouse Avenue, New Delhi - 110002" along with original Demand Draft (if fee paid by Demand Draft) for further processing so as to reach latest by 30.11.2011 . Application received beyond this date will not be accepted. Payment can be made as follows by Credit/Debit Card or Demand Draft in favour of the Secretary, Central Board of Secondary Education, Delhi drawn in any Nationalize

CARBON AND ITS COMPOUNDS F.A. - III-2011-12 TIME: 40 min.  Max. Marks. -40. 1. Name the compound formed on heating ethanol at 443 K with excess of conc. H2SO4.1 2. What happens when a small piece of sodium is dropped into ethanol?1 3. Write the chemical equation for the decarboxylation reaction of ethanoic acid.1 4. Give an example of esterification reaction.1 5. Name the product obtained when ethanol is oxidized by either chromic anhydride oralkaline Potassium per manganate. 1 6. Write the chemical equation representing the preparation reaction of ethanol from ethene.1 7. Name the two elements which are present both in CNG and petroleum.                     2 8. Draw the electronic dot structure of ethane molecule (C2H6).                                    2 9. Write the IUPAC name of the next homologue of CH3OHCH 2 CH3                         2 10. Define homologous series of organic compounds. Mention any two characteristics of homologous series.

Chapter - 8 How Do Organisms Reproduce Points to remember:- Q 1. What is the importance of DNA copying in reproduction? Ans. DNA contains information for inheritance of features from parents to next generation. DNA  present in the cell nucleus is the information source for making proteins. If the information is different,  different proteins will be made. Different proteins will eventually lead to altered body designs. Q 2. Why is variation beneficial to the species but not necessarily for the individual? Ans. Variations are useful for the survival of species in changed environmental situations. For  example, if a population of reproducing organisms were suited to a particular niche (well-defined  place of abode) and if the niche is drastically altered the population could be wiped out. However, if  some variations were to be present in a few individuals in these populations, there would be some  chance for them to survive. Thus if there were a population of bac

10th Our Environment HIGHER ORDER THINKIN SKILLS Chapter - 15 Our Environment HIGHER ORDER THINKIN SKILLS (HOTS) QUESTIONS 1) Write any two ways of energy flow through an ecosystem. 2) Differentiate between biodegradable and non biodegradable with respect to the effect of biological processes on them and the way they affect our environment. 3) Which level shows the maximum biological magnification? Why? 4) Why is a pond self sustaining unit while an aquarium may not be? Justify the answer. 5) Arrange grasshopper, frog, grass, eagle and snake in the form of food chain. 6) If 1000 KJ energy is available at producer level, how much energy will be available at first carnival level? 7) Why do most food chains have 3-5 steps only? 8) Select the biodegradable items from the list given below- Polythene bags, old clothes, wilted flowers, pencil shavings, glass bangles, bronze statue, vegetable peels. 9) What will be impact on ecosystem if bacteria and fungi are removed from the Environment? 10)