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Maharashtra SSC Class 10 Science and Technology I March 2018 question paper

Maximum marks 40 · Time 2 hours

Try each question first, then open its model answer. Where the paper offers a choice, both questions are shown with OR between them.

Q.1 (A)

1 mark each

  1. Q.1 (A) (a) (i)1 mark
    Fill in the blank with a suitable word: 1 calorie = ______ joule.
  2. Q.1 (A) (a) (ii)1 mark
    Fill in the blank with a suitable word: The arrangement of elements in a group of three is known as ______.
  3. Q.1 (A) (b) (i)1 mark
    State whether the following statement is true or false: Pollen, bacteria and fungal spores are also pollutants.
  4. Q.1 (A) (b) (ii)1 mark
    State whether the following statement is true or false: Magnetic lines of force always cross each other.
  5. Q.1 (A) (c)1 mark
    Taking into consideration the relationship in the first pair, complete the second pair: 2H2+O2→2H2O\mathrm{2H_2 + O_2 \rightarrow 2H_2O} : Combination Reaction :: 2HgO→2Hg+O2\mathrm{2HgO \rightarrow 2Hg + O_2} : ______

Q.1 (B)

1 mark each

  1. Q.1 (B) (1)1 mark
    When crystals of copper sulphate are strongly heated, the residue obtained is ______.

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  2. Q.1 (B) (2)1 mark
    Which type of mirror is used by a dentist?

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  3. Q.1 (B) (3)1 mark
    The equivalent resistance of the parallel combination of two resistors of 60 Ω60\ \Omega and 40 Ω40\ \Omega is ______.

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  4. Q.1 (B) (4)1 mark
    The litmus paper or the litmus solution is obtained from ______ plant.

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  5. Q.1 (B) (5)1 mark
    Which substance when used with butter having butyric acid can cure acidity?

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Q.2

2 marks each · attempt any 5

  1. Q.2 (1)2 marks
    State Newland's law of octaves.
  2. Q.2 (2)2 marks
    State the right hand thumb rule.
  3. Q.2 (3)2 marks
    If a bulb of 60 W is connected across a source of 220 V, find the current drawn by it.
  4. Q.2 (4)2 marks
    Draw a neat and labelled diagram of the structure of the human eye.
  5. Q.2 (5) (a)2 marks
    Define: Radius of curvature of a spherical mirror.
  6. Q.2 (5) (b)
    Define: Focal length of a spherical mirror.
  7. Q.2 (6)2 marks
    Give scientific reason: The sun appears reddish early in the morning.

Q.3

3 marks each · attempt any 5

  1. Q.3 (1)3 marks
    Write the merits of the modern periodic table over Mendeleev's periodic table.
  2. Q.3 (2)3 marks
    What is a redox reaction? Explain with one example.
  3. Q.3 (3)3 marks
    What is resistivity? Write the formula of resistivity. Write the SI unit of resistivity.
  4. Q.3 (4)3 marks
    Distinguish between degradable pollutants and non-degradable pollutants (any three points).
  5. Kavita from 10th standard is using spectacles. The power of the lenses in her spectacles is −2.5-2.5 dioptre.
    Q.3 (5) (a)3 marks
    Which lenses are used in her spectacles?
  6. Q.3 (5) (b)
    State the defect of vision Kavita is suffering from.
  7. Q.3 (5) (c)
    Find the focal length of the lenses used in her spectacles.
  8. Q.3 (6)3 marks
    Write the chemical name of bleaching powder and write its properties.

Q.4

5 marks each · attempt any 1

  1. Q.4 (A)5 marks
    Explain the construction and working of an electric motor.
  2. Q.4 (B)5 marks
    What is refraction of light? Draw the diagram of refraction of light in a glass slab. Write the laws of refraction.