Question Paper - Science and Technology - 1 2012 - 2013-S.S.C-Board Exam Maharashtra State Board (MSBSHSE)



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SubjectScience and Technology - 1
Year2012 - 2013 (March)

Marks: 30
Q: 1[7]
Q: 1.1 | Fill in the blanks:[2]
Q: 1.1.1[1]

The chemical formula for rust is.............. .

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Q: 1.1.2[1]

The law used by Newlands to arrange elements is known as........... .

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Q: 1.2 | State whether the following statements are true or false[2]
Q: 1.2.1[1]

The pH of rainwater is 7.

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Q: 1.2.2[1]

The SI unit of charge is volt.

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Q: 1.3 | Rewrite the following table so as to match the second and third columns with the first column:[3]
 Column IColumn IIColumn III
1DispersionLong-sightednessTwinkling of stars
2RefractionSplitting of white light into component coloursConvex lens
3HypermetropiaChange in the direction of the ray of light due to change in mediumSpectrum of seven colours
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Q: 2 | Answer the following questions:[6]
Q: 2.1[2]

Distinguish between Conductors and Insulators.

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Q: 2.2[2]

Why should the wires carrying electricity not be touched barefooted?

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Q: 2.3[2]

Calculate the focal length of a corrective lens having power +2.5 D.

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Q: 3 | Answer the following questions (any four):[12]
Q: 3.1[3]

The atomic masses of three elements A, B and C having similar chemical properties are 7, 23 and 39, respectively.

  1. Calculate the average atomic mass of elements A and C.
  2. Compare the average atomic mass with atomic mass of B.
  3. What could the elements A, B and C be?
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Q: 3.2[3]

When the substance ‘A’ is added to a solution of BaSO4, a yellow precipitate is formed.

  1. What do you think substance A is likely to be?
  2. Name the precipitate.
  3. Which type of reaction is this?
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Q: 3.3[3]

A person has sour taste in the mouth and a burning sensation of the stomach.

  1. What is he suffering from?
  2. Why does it happen?
  3. What substance is used as a remedy?
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Q: 3.4[3]

Write any three properties of magnetic lines of force.

List the properties of magnetic lines of force.

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Q: 3.5[3]

Explain how the formation of a rainbow occurs.

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Q: 4 | Answer the following (any one):[5]
Q: 4.1[5]

What is myopia? Explain two possible reasons of myopia. How can it be corrected? Explain with a suitable diagram.

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Q: 4.2[5]

Find the expression for resistors connected in series. Write any two characteristics of a series combination of resistors.

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