CROSSWORD 1. Self linking property of carbon 4. Acid having functional group –COOH 6 .Hydrogenation of vegetable oil is ---- reaction 8. Simplest hydrocarbon 9 IUPAC name of next higher homologous of ethanol 10. The substance used in making perfumes and flavoring agents DOWN 2. Hydrocarbon burns in air with sooty flame. 3. The functional group present in methanol. 5. Chlorination of alkanes is -------- reaction 7. The active ingredient of all alcoholic drinks. Question Bank Answer the following questions. Very short answer questions (1 mark) 1. Which of the following formulae represents a saturated hydrocarbon? CnH2n, CnH2n-2, CnH2n+2, CnH2n+1 2. Draw the electron dot structure of Ethene . Short answer question (2mark) 1. Why is the conversion of ethanol to ethanoic acid an oxidation reaction? 2. What is meant by denatured alcohol? What is the need to denature alcohol? Short answer question (3 mark) 1. An organic compound A of molecular formula C2H6O on heating with excess of conc.H2SO4 gives compound B of molecular formula C2H4 .Compound B on reduction gives compound C of molecular formula C2H6. a) Name A, B and C. b) Write the chemical equation for the conversion of A to B c) What is the role of conc.H2SO4 in above equation? (HOTS) VALUE BASED QUESTION Meera and her mother were travelling in a CNG auto. The auto driver took the auto to the CNG filling station for filling the empty cylinder. Meera asked her mother about the gas used to fill the cylinder. Her mother replied that the gas used was CNG.CNG is used in place of petrol or diesel because it is cheaper, pollution free and eco-friendly.
2.Writescientific term for the following: a) Release of ovum from ovary. Ans) Ovulation b)Onset of menstrual cycle in a female. Ans) Menarche. 3. Where does fertilization takes place in human female? Ans.) Oviduct (fallopian tube) Short answer questions ( 2 mark) 1 .What is the importance of DNA copying in reproduction? Ans. DNA copying is essential for transferring genetic material from one generation to another. 2.How is pollination different from fertilization? Ans. Pollination is the process of transfer of pollen grains from the anther lobe to the stigma of the flower, while fertilization is the process of fusion of malegamete and female gamete to form the zygote. 3.What is the role of seminal vesicles and the prostate gland? Ans: Seminal vesicle and prostate gland help in nutrition and mobility of sperms. Short answer questions( 3 mark) 1.What are the advantages of vegetative propagation? Ans: Quick/easy/economical method/can creates exact copies of the parent/only method for the propagation of seedless plants. 2. How does the embryo get nourishment inside the mother’s body? Ans: the embryo gets nutrition, oxygen and gets rid of waste materials throughPlacenta. 3a)What is AIDS? b)Name the causative organism? c)List the important modes of transmission of the disease. Ans.a)Acquired immuno deficiency syndrome. b) HIV (human immunodeficiency virus) c)i) Sexual contact ii) Through infected blood transfusion iii) Contaminated syringes. iv) Infected mother to child.
IMPORTANT FORMULAE Relationship between focal length and radius of curvature of a mirror f=R/2 Mirror formula 1/v +1/u =1/f [ V-image distance , U-object distance, f-focal length] Magnification produced by mirror – h’/h = - v/u Snell’s law = = 1n2 Absolute refractive index n = c/v Lens formula 1/v – 1/u = 1/f Magnification produced by lens h’/h = v/u Power of lens P =1/f when focal length is in cm’s P=100/f D RAY DIAGRAMS Fig 10.1 NATURE, IMAGE AND ITS FORMATION (CONCAVE MIRROR) FIG – 10.2 NATURE, IMAGE AND ITS FORMATION (CONVEX MIRROR) Object at infinity Object between infinity and pole Fig- 10.3 NATURE, IMAGE AND ITS FORMATION (CONVEX LENS)