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


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

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

Chapter: [1.01] Chemical Reactions
Concept: Chemical Reactions - Types of Chemical Reactions - Oxidation and Reduction
[1]1.1.2

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

Chapter: [1.05] Periodic Classification of Elements
Concept: Early Attempts at the Classification of Elements - Newlands’ Law of Octaves
[2]1.2 | State whether the following statements are true or false
[1]1.2.1

The pH of rainwater is 7.

Chapter: [1.02] Acids, Bases and Salts
Concept: Concept of Ph Scale
[1]1.2.2

The SI unit of charge is volt.

Chapter: [4.01] Effects of Current
Concept: Electric Current and Circuit
[3]1.3 | Rewrite the following table so as to match the second and third columns with the first column:
  Column I Column II Column III
1 Dispersion Long-sightedness Twinkling of stars
2 Refraction Splitting of white light into component colours Convex lens
3 Hypermetropia Change in the direction of the ray of light due to change in medium Spectrum of seven colours
Chapter: [3] Natural Phenomena
Concept: Refraction of Light - Introduction
[6]2 | Answer the following questions:
[2]2.1

Distinguish between Conductors and Insulators.

Chapter: [4.01] Effects of Current
Concept: Electric Potential Difference
[2]2.2

Why should the wires carrying electricity not be touched barefooted?

Chapter: [4.02] Magnetic Effects of Current
Concept: Domestic Electric Circuits
[2]2.3

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

Chapter: [6] Wonders of Light 1
Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens
[12]3 | Answer the following questions (any four):
[3]3.1

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?
Chapter: [1.05] Periodic Classification of Elements
Concept: Position of Elements and Trends in the Modern Periodic Table
[3]3.2

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?
Chapter: [1.01] Chemical Reactions
Concept: Chemical Reactions - Types of Chemical Reactions - Double Displacement
[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?
Chapter: [3] The Acid Base Chemistry
Concept: Acids, Bases and Their Reactivity
[3]3.4

Write any three properties of magnetic lines of force.

Chapter: [3.02] Magnetism and Matter
Concept: The Bar Magnet
[3]3.5

Explain how the formation of a rainbow occurs.

Chapter: [7] Wonders of Light 2
Concept: Refraction of Light - Refraction of Light Through a Glass Block and a Triangular Prism
[5]4 | Answer the following (any one):
[5]4.1

What is myopia?

Chapter: [3] Natural Phenomena
Concept: Defects of Vision and Their Correction

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

Chapter: [3] Natural Phenomena
Concept: Defects of Vision and Their Correction
[5]4.2

Find the expression for resistors connected in series.

Chapter: [4] The Electric Spark
Concept: Resistance of a System of Resistors - Resistors in Series

Write any two characteristics of a series combination of resistors.

Chapter: [4] The Electric Spark
Concept: Resistance of a System of Resistors - Resistors in Series
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