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Question Paper Solutions for Science and Technology - 1 2017-2018 SSC (Marathi Semi-English) 10th

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Science and Technology - 1
2017-2018 March
Marks: 40

[10]1
[5]1.1
[2]1.1.1 | Rewrite the following statements with suitable words in the blanks
[1]1.1.1.1

1 calorie =  _________ joule.

Chapter: [14] The Electric Spark
Concept: Electric Power
[1]1.1.1.2

The arrangement of elements in a group of three is known as ________.

Chapter: [2] Periodic Classification of Elements
Concept: Early Attempts at the Classification of Elements - Dobereiner’s Triads

The arrangement of elements in a group of three is known as ________.

Chapter: [11] School of Elements
Concept: Early Attempts at the Classification of Elements - Dobereiner’s Triads
[2]1.1.2 | State whether the following statements are true or false :
[1]1.1.2.1

Pollen, Bacteria, Fungal spores are also pollutants.

Chapter: [18] Striving for better Environment 1
Concept: Sources of Pollution and Major Pollutan - Air
[1]1.1.2.2

Magnetic lines of force always cross each other

Chapter: [15] All about Electromagnetism
Concept: Magnetic Force
[1]1.1.3

Taking into consideration the relationship in the first pair, complete the second pair

2H2 + O2 → 2H2O :Combination Reaction :: 2HgO → 2Hg + O2:_________

Chapter: [12] The Magic of Chemical Reactions
Concept: Chemical Reactions - Types of Chemical Reactions - Decomposition
[5]1.2 | Rewrite the following statements by Selecting the correct options
[1]1.2.1

When crystals of copper sulphate are strongly heated, the residue obtained is ___________.

(A) red in colour

(B) blue in colour

(C) green in colour

(D) colourless

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

Which type of mirror is used by a dentist?

Chapter: [16] Wonders of Light 1
Concept: Reflection of Light - Image Formation by Spherical Mirrors - Concave Mirror
[1]1.2.3

The equivalent resistance of the parallel combination of two resistors of 60Ω and 40Ω is _______.

A) 24Ω

(B) 100Ω

(C) 50 Ω

(D) 240Ω

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

The litmus paper or the litmus solution is obtained from ________ plant

(A) Moss

(B) Lichen

(C) Rose

(D) Hibiscus

Chapter: [13] The Acid Base Chemistry
Concept: Chemical Properties of Acids and Bases
[1]1.2.5

Which substance when used with butter having butyric acid can cure acidity?

(A) Lime water

(B) Soda water

(C) Calcium carbonate

(D) Lime juice

Chapter: [13] The Acid Base Chemistry
Concept: Acids, Bases and Their Reactivity
[10]2 | State any five of the following
[2]2.1

State Newlands‘ Law of Octaves.

Chapter: [2] Periodic Classification of Elements
Concept: Early Attempts at the Classification of Elements - Newlands’ Law of Octaves

State Newlands‘ Law of Octaves.

Chapter: [11] School of Elements
Concept: Early Attempts at the Classification of Elements - Newlands’ Law of Octaves
[2]2.2

State the right-hand thumb rule.

Chapter: [15] All about Electromagnetism
Concept: Right-Hand Thumb Rule
[2]2.3

If a bulb of 60W is connected across a source of 220V, find the current drawn by it.

Chapter: [14] The Electric Spark
Concept: Electric Power
[2]2.4

Draw a neat and labelled diagram of the structure of the human eye

Chapter: [7] Lenses
Concept: Concept of Human Eye

Draw a neat and labelled diagram of the structure of the human eye

Chapter: [16] Wonders of Light 1
Concept: Concept of Human Eye
[2]2.5

Define Radius of curvature of the spherical mirror

Chapter: [16] Wonders of Light 1
Concept: Reflection of Light - Spherical Mirrors

Define the Focal length of a spherical mirror

Chapter: [16] Wonders of Light 1
Concept: Reflection of Light - Spherical Mirrors
[2]2.6

Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.

Chapter: [17] Wonders of Light 2
Concept: Some Natural Phenomena Due to Sunlight
[15]3 | Answer any five of the following
[3]3.1

Write the merits of the modern periodic table over Mendeleev’s Periodic table

Chapter: [2] Periodic Classification of Elements
Concept: The Modern Periodic Table

Write the merits of the modern periodic table over Mendeleev’s Periodic table

Chapter: [11] School of Elements
Concept: The Modern Periodic Table
[3]3.2

Define ‘redox reaction’. Give one example.

Chapter: [3] Chemical Reactions and Equations
Concept: Chemical Reactions - Types of Chemical Reactions - Oxidation and Reduction

Define ‘redox reaction’. Give one example.

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

What is Resistivity?

Chapter: [14] The Electric Spark
Concept: Ohm’s Law

Write the formula of resistivity

Chapter: [14] The Electric Spark
Concept: Ohm’s Law

Write the SI unit of resistivity

Chapter: [14] The Electric Spark
Concept: Ohm’s Law
[3]3.4

Distinguish Degradable pollutants - Non-degradable pollutants

Chapter: [18] Striving for better Environment 1
Concept: Sources of Pollution and Major Pollutant - Soil
[3]3.5

Kavita from 10th is using spectacles. The power of the lenses in her spectacles is –2.5 dioptre. Answer the following questions:

1) Which lenses are used in her spectacles?

2) State the defect of vision Kavita is suffering from.

3) Find the focal length of the lenses used in her spectacles

Chapter: [16] Wonders of Light 1
Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens
[3]3.6

Write the chemical name of bleaching powder and write its properties.

Chapter: [13] The Acid Base Chemistry
Concept: Chemicals from Common Salt - Bleaching Powder
[5]4 | Answer any one of the following
[5]4.1

Explain the construction and working of an electric motor.

Chapter: [4] Effects of Electric Current
Concept: Electric Motor

Explain the construction and working of an electric motor.

Chapter: [15] All about Electromagnetism
Concept: Electric Motor
[5]4.2

What is refraction of light? 

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

Draw the diagram of refraction of light in the glass slab

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

State the laws of refraction of light. 

Chapter: [17] Wonders of Light 2
Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab

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