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Science and Technology 1 2015-2016 SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] Question Paper Solution

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Science and Technology 1
Marks: 40 Academic Year: 2015-2016
Date & Time: 12th March 2016, 11:00 am
Duration: 2h
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[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: [0.02] Periodic Classification of Elements [0.11] 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: Periodic Properties
Chapter: [0.02] Periodic Classification of Elements [0.11] School of Elements
[1] 1.1.1.3

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

Concept: Oxidation, Reduction and Redox Reactions
Chapter: [0.03] Chemical Reactions and Equations [0.12] 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
Chapter: [0.14] 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: Types of Chemical Change or Chemical Reaction - Single Displacement Reactions
Chapter: [0.03] Chemical Reactions and Equations [0.12] 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: Properties of Acids
Chapter: [0.13] The Acid Base Chemistry
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[1] 1.2.3

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

Concept: System of Resistors - Resistors in Series
Chapter: [0.14] 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: Linear Magnification (M) Due to Spherical Mirrors
Chapter: [0.16] 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 Through a Rectangular Glass Slab
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2 [0.17] Wonders of Light 2
[10] 2 | Answer the following questions (any five):
[2] 2.1

Define 1 volt PD

Concept: Electric Potential Difference
Chapter: [0.14] The Electric Spark

Define Electric power

Concept: Electrical Power
Chapter: [0.04] Effects of Electric Current [0.14] The Electric Spark
[2] 2.2

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

Concept: Effects of Air Pollution
Chapter: [0.18] Striving for better Environment 1
[2] 2.3

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

Concept: Power of a Lens
Chapter: [0.07] Lenses [0.16] Wonders of Light 1
[2] 2.4

Write two applications of sodium bicarbonate (baking soda).

Concept: Chemicals from Common Salt (Uses of Salt) - Preparation and Uses of Baking Soda
Chapter: [0.13] The Acid Base Chemistry
[2] 2.5

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

Concept: Spherical Mirrors
Chapter: [0.16] Wonders of Light 1 [0.16] Wonders of Light 1
[2] 2.6

Draw neat and labelled diagram of pH scale.

Concept: Strength of Acidic or Basic Solutions
Chapter: [0.13] The Acid Base Chemistry [0.13] The Acid Base Chemistry
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[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: [0.02] Periodic Classification of Elements [0.11] School of Elements
[3] 3.2

Define ‘redox reaction’. Give one example.

Concept: Oxidation, Reduction and Redox Reactions
Chapter: [0.03] Chemical Reactions and Equations [0.12] 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: Eye Defect and Its Correction: Myopia Or Near-sightedness
Chapter: [0.07] Lenses [0.16] Wonders of Light 1
[3] 3.4

What is refraction of light? Explain with the help of example.

Concept: Refraction of Light
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2

How refraction of light is related to refractive index?

Concept: Refractive Index
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2
[3] 3.5

Explain how spectrum is formed.

Concept: Refraction of Light Through a Rectangular Glass Slab
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2 [0.17] Wonders of Light 2
[3] 3.6

Suggest measures to avoid noise pollution in classroom.

Concept: Noise Pollution
Chapter: [0.18] Striving for better Environment 1

Suggest measures to minimize electricity consumption at home.

Concept: Sustainable Use of Resources
Chapter: [0.18] Striving for better Environment 1

Suggest measures in bursting fire crackers in festivals and processions.

Concept: Abatement of Pollution
Chapter: [0.18] 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: System of Resistors - Resistors in Series
Chapter: [0.14] 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: [0.04] Effects of Electric Current [0.15] All about Electromagnetism

Principle of Electric motor

Concept: Electric Motor
Chapter: [0.04] Effects of Electric Current [0.15] All about Electromagnetism

Name any four appliances where electric motor is used.

Concept: Electric Motor
Chapter: [0.04] Effects of Electric Current [0.15] All about Electromagnetism

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