Solved papers for 10th Class Science Solved Paper - Science-2016 Delhi Set-II

done Solved Paper - Science-2016 Delhi Set-II Total Questions - 11

• question_answer1) 

  Name the following compounds:

  (a)  \[C{{H}_{3}}-C{{H}_{2}}-OH;\]

  (b)    \[C{{H}_{3}}-\overset{\overset{H}{\mathop{|}}\,}{\mathop{C}}\,=O\]

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• question_answer2) What is DNA?
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• question_answer3) List two biotic components of a biosphere.
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• question_answer4) 

  A ray of light is incident on a convex mirror as shown. Redraw the diagram and complete the path of this ray after reflection from the mirror. Mark angle of incidence and angle of reflection on it.

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• question_answer5) What is an oxidising agent? What happens when an oxidising agent is added to propanol? Explain with the help of a chemical equation.
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• question_answer6) Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid element.
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• question_answer7) What are the functions of testis in the human male reproductive system? Why are these located outside the abdominal cavity? Who is responsible for bringing about changes in appearance seen in boys at the time of puberty?
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• question_answer8) What is multiple fission? How does it occur in an organism? Explain briefly. Name one organism which exhibits this type of reproduction.
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• question_answer9) How did Mendel interpret his result to show that traits may be dominant or recessive? Describe briefly.
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• question_answer10) What is meant by scattering of light? The sky appears blue and the sun appears reddish at sunrise and sunset. Explain these phenomena with reason.
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• question_answer11) 

  (a) Draw a ray diagram to show the formation of image by a concave lens when an object is placed in front of it.

  (b) In the above diagram mark the object-distance (u) and the image-distance (v) with their proper signs (+ve or ?ve as per the new Cartesians sign convention) and state how these distances are related to the focal length (f) of the concave lens in this case.

  (c) Find the nature and power of a lens which forms a real and inverted image of magnification ?1 at a distance of 40cm from its optical centre.

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