Question Paper - Science and Technology - 1 2014 - 2015-S.S.C-Board Exam Maharashtra State Board (MSBSHSE)



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SubjectScience and Technology - 1
Year2014 - 2015 (March)

Marks: 40
Q: 1[10]
Q: 1.1[5]
Q: 1.1.1 | Rewrite the following statements with suitable words in the blanks:[2]

The device used for producing electric current is called _________.

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_________ the second layer of the atmosphere reaches 48 km above the Earth’s surface.

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Q: 1.1.2[2]
 Column A Column B
ieosin1losing hydrogen
iioxidation2synthetic indicator
  3losing oxygen
  4natural indicator


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Q: 1.1.3[1]

Give the molecular formula of bleaching powder.

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Q: 1.2 | Rewrite the following statements by selecting the correct options :[5]
Q: 1.2.1[1]

When phenolphthalein is added to NaOH, the colour of the solution will become _________.

  1. colourless
  2. red
  3. pink
  4. yellow
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Q: 1.2.2[1]

If the potential difference across the ends of a conductor is 220 V and the resistance of the conductor is 44 Ω (ohm), then the current flowing through is _________.

  1. 0.2 A
  2. 0.5 A
  3. 2 A
  4. 5 A
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Q: 1.2.3[1]

1 A = _________ mA

  1. 102
  2. 103
  3. 10-3
  4. 10-6
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Q: 1.2.4[1]

The distance between principal focus and optical centre of the lens is _________.

  1. diameter
  2. focal length
  3. principal axis
  4. optical centre
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Q: 1.2.5[1]

When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.

  1. perpendicular
  2. parallel
  3. opposite
  4. concurrent
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Q: 2 | Solve any five of the following:[10]
Q: 2.1[2]

Give scientific reason : Danger signals are red in colour.

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Q: 2.2[2]

Complete the following reaction, balance it and write the name of the products CuO + HCI _________ + _________

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Q: 2.3[2]

State Newlands‘ Law of Octaves.

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Q: 2.4[2]

The velocity of light in a medium is 1.5 x 108 m/s. What is the refractive index of the medium with respect to air, if the velocity in air is 3 x 108 m/s?

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Q: 2.5[2]

Differentiate between resistances in series and parallel.

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Q: 2.6[2]

Draw a ray diagram for concave mirror when the object is between centre of curvature and focus.

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Q: 3 | Answer any five of the following :[15]
Q: 3.1[3]

Explain the role of citizen in pollution control.

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Q: 3.2[3]

What is a spectrum? Why do we get a spectrum of seven colours when white light is dispersed by a prism?

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Q: 3.3[3]

State four most common electrical appliances based on heating effect of electric current. Why do we use finely heated platinum wire in surgery?

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Q: 3.4[3]

Name the product obtained when Plaster of Paris is mixed with water. State the use of the product. Give two uses of POP.

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Q: 3.5[3]
Q: 3.6[3]
Q: 3.6.1[1]

Complete the following :-


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Q: 3.6.2[1]

Complete the following :-


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Q: 3.6.3[1]

Complete the following :-


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Q: 4 | Answer any one of the following :[5]
Q: 4.1 | Often when electricity is used we come across electrical fires caused. Answer the following questions related to the following terms:[5]
Q: 4.1.1[1]

When does short circuiting take place?

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Q: 4.1.2[1]

What happens to the resistance of the circuit during a short circuit?

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Q: 4.1.3[1]

What happens to the flow of electric current during a short circuit?

When does an electric short circuit occur?

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Q: 4.1.4[1]

What is overloading?

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Q: 4.1.5[1]

How can the effects of overloading be avoided?

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Q: 4.2[5]

In a Std. X class out of 40 students 10 students use spectacles, 2 students have positive power and 8 students have negative power of lenses in their spectacles.

Answer the following questions:

(1) What does the negative power indicate?

(2) What does the positive power indicate?

(3) Generally which type of spectacles do most of the students use?

(4) What defect of eyesight do most of the students suffer from?

(5) Give two possible reasons for the above defect.

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