PHD 

It’s always recommended to practice as many sample papers as possible before heath chemistry textbook pdf examinations. Students can download the sample papers and also question papers of previous years to practice and score better marks in examinations. Refer to other links too for more sample papers.

Section A 1 Name the process of converting vegetable oil to vegetable ghee. 2 List two secondary sexual characters of males that are different from that of females. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would see the size of the image? Draw a ray diagram to justify your answer. 5 If you find coliform bacteria in a sample of water collected from a river, what would you conclude? Give reason for such kind of water pollution.

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Give reason to justify this statement and draw structures of two isomers of butane, C4 H10. X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. X reacts with Y in the presence of conc. Z’ which has a pleasant smell. A’ belongs to 3rd period and 17th group of the periodic table. Write the nature of bond formed if A reacts with another element B of electronic configuration 2, 8, 1.

Write the chemical formula of the compound formed. Select the element having one election in the outer most shell. Select two elements of the same group. Write the formula and state the nature of the Compound formed when the element K reacts with an element X of electronic configuration 2, 8, 7. 11 Explain with the help of labelled diagrams the development that takes place in each of the body parts of a Planaria where body is cut into three pieces. 12 List any four methods of contraception used by humans.

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