SSC (Marathi Semi-English) 10thMaharashtra State Board
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Science and Technology - 1 2015-2016 SSC (Marathi Semi-English) 10th Question Paper Solution

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Science and Technology - 1
Marks: 40Date: 2016-03-12
Duration: 2h

[10]1
[5]1.1
[3]1.1.1 | Fill in the blanks:
[1]1.1.1.1

Fill in the blank:

The modern periodic table consists of ……………. periods.

Concept: The Modern Periodic Table
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[1]1.1.1.2

Fill in the blank:

The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.

Concept: Position of Elements and Trends in the Modern Periodic Table
Chapter: [11] School of Elements
[1]1.1.1.3

Corrosion can be prevented by using ……………. solution.

Concept: Chemical Reactions - Types of Chemical Reactions - Oxidation and Reduction
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
[2]1.1.2 | Find the odd one out:

Find the odd one out:

(i) Voltmeter, ammeter, galvanometer, thermometer.
(ii) Loudspeaker, bar magnet, electric motor, microphone.

Concept: Electric Current and Circuit
Chapter: [14] The Electric Spark
[5]1.2 | Choose the correct alternative and rewrite the following:
[1]1.2.1

Reaction of iron nails with copper sulphate solution is an example of
(a) Combination reaction
(b) Decomposition reaction
(c) Displacement reaction
(d) Double displacement reaction

Concept: Chemical Reactions - Types of Chemical Reactions - Displacement
Chapter: [12] The Magic of Chemical Reactions
[1]1.2.2

Dilute NaOH can be tested with
(a) red litmus paper
(b) blue litmus paper
(c) lime water
(d) Na2CO3

Concept: Chemical Properties of Acids and Bases
Chapter: [13] The Acid Base Chemistry
[1]1.2.3

In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables

Concept: Resistance of a System of Resistors - Resistors in Series
Chapter: [14] The Electric Spark
[1]1.2.4

An object of 10 cm is placed in front of a plane mirror. The height of image will be …………….
(a) 5 cm
(b) 15 cm
(c) 20 cm
(d) 10 cm

Concept: Mirror Formula and Magnification
Chapter: [16] Wonders of Light 1
[1]1.2.5

When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it …………….
(a) bends towards normal
(b) bends away from normal
(c) passes unbent
(d) passes in zigzag way

Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab
Chapter: [17] Wonders of Light 2
[10]2 | Answer the following questions (any five):
[2]2.1

Define 1 volt PD

Concept: Electric Potential Difference
Chapter: [14] The Electric Spark

Define Electric power

Concept: Electric Power
Chapter: [14] The Electric Spark
[2]2.2

What major harm is done to the human beings by air pollution?

Concept: Effects of Air Pollution
Chapter: [18] Striving for better Environment 1
[2]2.3

Calculate the focal length of a corrective lens having power +2D.

Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens
Chapter: [16] Wonders of Light 1
[2]2.4

Write two applications of sodium bicarbonate (baking soda).

Concept: Chemicals from Common Salt - Baking Soda
Chapter: [13] The Acid Base Chemistry
[2]2.5

A simple microscope is used by watch repairers. Give reason.

Concept: Applications of Spherical Mirrors and Lenses
Chapter: [16] Wonders of Light 1
[2]2.6

Draw neat and labelled diagram of pH scale.

Concept: Concept of Ph Scale
Chapter: [13] The Acid Base Chemistry
[15]3 | Answer the following questions (any five):
[3]3.1

What are the main features of Mendeleev’s periodic table?

Concept: Mendeleev’s Periodic Table
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[3]3.2

Define ‘redox reaction’. Give one example.

Concept: Chemical Reactions - Types of Chemical Reactions - Oxidation and Reduction
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
[3]3.3

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.

Concept: Defects of Vision and Their Correction
Chapter: [16] Wonders of Light 1
[3]3.4

What is refraction of light? 

Concept: Refraction of Light - Introduction
Chapter: [17] Wonders of Light 2

How refraction of light is related to refractive index?

Concept: Refraction of Light - Refractive Index
Chapter: [6] Refraction of Light [17] Wonders of Light 2
[3]3.5

Explain how spectrum is formed.

Concept: Refraction of Light - Refraction of Light Through a Glass Block and a Triangular Prism
Chapter: [17] Wonders of Light 2
[3]3.6

Suggest measures to avoid noise pollution in classroom.

Concept: Noise Pollution and Effects
Chapter: [18] Striving for better Environment 1

Suggest measures to minimize electricity consumption at home.

Concept: Sustainable Use of Resources
Chapter: [18] Striving for better Environment 1

Suggest measures in bursting fire crackers in festivals and processions.

Concept: Abatement of Pollution
Chapter: [18] Striving for better Environment 1
[5]4 | Answer any one of the following questions:
[5]4.1

Find the expression for the resistors connected in series and write the two characteristics of it. (Draw figure).

Concept: Resistance of a System of Resistors - Resistors in Series
Chapter: [14] The Electric Spark
[5]4.2 | Explain ‘Electric motor’ with the help of the following points:

Draw figure ‘Electric motor’ and working 

Concept: Electric Motor
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism

Principle of Electric motor

Concept: Electric Motor
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism

Name any four appliances where electric motor is used.

Concept: Electric Motor
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism

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