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SECTION "B" (Short Answer Question) Marks:24
NOTE: Answer any EIGHT (8) questions from this section.
Each question carries 3 marks.
2. Define Organic Chemistry and write two general characteristics of organic compounds.
3. Write down three physical properties of water.
4. What are carbohydrates? Differentiate between aldoses and ketoses
5. Frame structural formulae of the following:
(i) 2.3 dimethyl pentane
(ii) 3 ethyl 1 hexene
(iii) pentyme
6. Define
(i) Error
(ii) Precision
(iii) Accuracy
7. What are the three spreading factors of pollution? Describe them.
8. What is meant by acid rain and how it demolishes monuments?
9. What materials are required for preparation of soft drink? Name them.
10. Draw flowsheet of soap preparation.
11. Find pH, pOH, [OH−] and [H+] of 2.46 × 10−9 M KOH solution.
12. Write one use of each of the following salts:
(i) Hydrated calcium sulphate
(ii) Iron (II) sulphate hepta-hydrate
(iii) Potassium permanganate.
13. Give Reason:
(i) Why number of carbon compounds are more than of silicon compound?
(ii) The higher the altitude of atratosphere the temperature is increased.
Section C (Detailed –Answer Question) (24)
NOTE: Attempt any FOUR (4) questions from this Section.
Each question tries (Six) 6 marks.
14. State three different theories about concepts of acid and base, with example also indicate one limitation of each concept. Also complete conjugated acid and conjugated base of the following reactions:
Acid + Base = Conjugated acid + Conjugating base
H2SO4 + H2O = . + .
HCl + NH3 = . + .
CH3COOH + H2O = . + .
15. Elaborate Greenhouse effect.(Global Warming)
16. Describe any sir water borne diseases.
17. What are salts? Write down its preparation by the action of acid on:
with representative balanced chemical equation for each:
(i) Metal hydroxide
(ii) Metal carbonate
(iii) Metal oxide
18. Define Petroleum. Describe fractional distillation of it. Write name of any five fractions distilled from petroleum with hydrocarbon and show it by the help of labelled diagram.
19. What is meant by origin of pharma? Elaborate any five beneficial impacts of pharmaceutical industry in our society.
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