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Question Paper Solutions - Science and Technology - 1 2013 - 2014-S.S.C-10th Maharashtra State Board (MSBSHSE)


Marks: 40
[10]1
[5]1.1
[3]1.1.1 | Rewrite the following statements with suitable words in the blanks:
[1]1.1.1.1

Very fine particles mainly scatter ………… coloured light.

Chapter: [7] Wonders of Light 2
Concept: Some Natural Phenomena Due to Sunlight
[1]1.1.1.2

The element eka-silicon in Mendeleev’s periodic table is known as ………… in the modern periodic table.

Chapter: [1.05] Periodic Classification of Elements
Concept: Achievements of Mendeleev’s Periodic Table
[1]1.1.1.3

Sodium or potassium salt of higher fatty acid is termed …………

Chapter: [3] The Acid Base Chemistry
Concept: Chemicals from Common Salt - Soap as a Salt
[2]1.1.2
[1]1.1.2.1

CuSO4(aq) + Zn(s)  ZnSO4(aq) + Cu(s) is an example of a decomposition reaction.

Chapter: [2] The Magic of Chemical Reactions
Concept: Chemical Reactions - Types of Chemical Reactions - Displacement
[1]1.1.2.2

Magnetic lines of force are closed continuous curves.

Chapter: [3.02] Magnetism and Matter
Concept: The Bar Magnet
[5]1.2 | Rewrite the following statements by selecting the correct options
[1]1.2.1

The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is

  1. Cu2O
  2. Cu
  3. CuO
  4. CuS
Chapter: [2] The Magic of Chemical Reactions
Concept: Chemical Reactions - Types of Chemical Reactions - Displacement
[1]1.2.2

What will be the change in the current if the potential difference is kept constant and the resistance of the circuit is made four times?

  1. It will remain unchanged.
  2. It will become four times.
  3. It will become one-fourth.
  4. It will become half.
Chapter: [11] Current Electricity
Concept: Ohm’s Law
[1]1.2.3

A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?

  1. 50°
  2. 25°
  3. 40°
  4. 100°
Chapter: [7] Wonders of Light 2
Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab
[1]1.2.4

From which plant is litmus paper or litmus solution obtained?

  1. Moss
  2. Rose
  3. Hibiscus
  4. Lichen
Chapter: [3] The Acid Base Chemistry
Concept: Chemical Properties of Acids and Bases
[1]1.2.5

If the equivalent resistance is to be increased, then the number of resistances should be connected in

  1. Series
  2. Parallel
  3. Mixed arrangement
  4. None of the above
Chapter: [4] The Electric Spark
Concept: Resistance of a System of Resistors - Resistors in Series
[10]2 | Answer any five of the following
[2]2.1

Elements in the same group show the same valency. Give scientific reason.

Chapter: [1.05] Periodic Classification of Elements
Concept: Position of Elements and Trends in the Modern Periodic Table
[2]2.2

Find the resistance of a conductor if 0.24 A current is passing through it and a potential difference of 24 V is applied across it.

Chapter: [11] Current Electricity
Concept: Ohm’s Law
[2]2.3

Differentiate between primary pollutants and secondary pollutants.

Chapter: [5] Pollution
Concept: Pollution - Types of Pollution
[2]2.4

Write the electronic configuration of K and Ne.

Chapter: [1.05] Periodic Classification of Elements
Concept: Position of Elements and Trends in the Modern Periodic Table
[2]2.5

State Fleming’s right-hand rule.

Chapter: [4.01] Electromagnetic Induction
Concept: Electromagnetic Induction
[2]2.6

Write a short note on dispersion of light.

Chapter: [7] Wonders of Light 2
Concept: Refraction of Light - Refraction of Light Through a Glass Block and a Triangular Prism
[15]3 | Answer any five of the following:
[3]3.1

State three differences between direct current and alternating current.

Chapter: [4.01] Electromagnetic Induction
Concept: Electromagnetic Induction
[3]3.2

After you have dinner tonight, wash your own plates with soap/detergent.

  1. What colour change is observed when soap/detergent is applied?
  2. Name the type of reaction and explain it.
Chapter: [1.01] Chemical Reactions
Concept: Chemical Reactions - Types of Chemical Reactions - Neutralization
[3]3.3

Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:

Indicator Colour change Inference
Methyl Orange No change ......................
.................... Acid
Yellow .......................
Chapter: [1.01] Chemical Reactions
Concept: Chemical Equation
[3]3.4

Given below is a diagram showing a defect of human eye. Study it and answer the following questions.

(i) Name the defect shown in the figure.
(ii) Give reason for this defect of eye in human being.
(iii) Name the type of lens used to correct the eye defect.

Chapter: [3] Natural Phenomena
Concept: Defects of Vision and Their Correction
[3]3.5

State three effects of radioactive pollution.

Chapter: [8] Striving for better Environment 1
Concept: Radioactive Pollution and Effects
[3]3.6

Define refraction and state the laws of refraction.

Chapter: [7] Wonders of Light 2
Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab
[5]4 | Attempt any one of the following
[5]4.1

With a neat labelled diagram and derive the equation for three resistances connected in parallel.

Chapter: [4.01] Effects of Current
Concept: Resistance of a System of Resistors - Resistors in Parallel
[5]4.2

With the help of an appropriate ray diagram, state the sign conventions for reflection by a spherical mirror.

Chapter: [6] Wonders of Light 1
Concept: Representation of Images Formed by Spherical Mirrors Using Ray Diagrams - Concave Mirror
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