# Science and Technology 1 2016-2017 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

Science and Technology 1
Date & Time: 18th March 2017, 11:00 am
Duration: 2h

[10]1
[5]1.A
[2]1.A.i
[1]1.A.i.i

Find the odd man out:

Camphor, Ammonium Chloride, Naphthalene balls, Sugar

Concept: Types of Chemical Reactions - Combination Reaction
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
[1]1.A.i.ii

Find the odd man out:

Turmeric, Methyl Orange, Rose petals, Beetroot.

Concept: Chemical Equation
Chapter: [3] Chemical Reactions and Equations [3] Chemical Reactions and Equations [3] Chemical Reactions and Equations [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions [12] The Magic of Chemical Reactions
[2]1.A.ii

Match the following:

 Column I Column II (i) Myopia (a) Converging power of eye lens becomes low (ii) Hypermetropia (b) Converging power of eye lens remains the same (c) Converging power of eye lens becomes high
Concept: Concept of Human Eye
Chapter: [7] Lenses [16] Wonders of Light 1
[1]1.A.iii

Fill in the blank:

To increase the effective resistance in a circuit the resistors are connected in _____________.

Concept: Electric Current
Chapter: [14] The Electric Spark
[5]1.B | Rewrite the following statements by selecting the correct options:
[1]1.B.i

Rewrite the following statements by selecting the correct options:
$\ce{CaCO3 ->[\Delta] CaO + CO2 ^}$ is a __________ reaction.

combination

displacement

double displacement

decomposition

Concept: Types of Chemical Reactions - Decomposition Reactions
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
[1]1.B.ii

The colour of universal indicator solution is ____________.

(a) red
(b) blue
(c) green
(d) greenish yellow

Concept: Concept of Ph Scale
Chapter: [13] The Acid Base Chemistry
[1]1.B.iii

The height of the image formed by an object of height 10 cm placed in front of a plane mirror is __________.

(a) 5 cm
(b) 10 cm
(c) 15 cm
(d) 20 cm

Concept: Linear Magnification (M) Due to Spherical Mirrors
Chapter: [16] Wonders of Light 1
[1]1.B.iv

Choose the correct alternative and rewrite the following sentence.

When the resistance of a conductor increases, the current will ________ increase.

increase

decrease

remain the same

None of the the above.

Concept: Electric Current
Chapter: [14] The Electric Spark
[1]1.B.v

Lime water turns milky when __________ gas is passed through it.

(a) H2
(b) CO
(c) CO2
(d) SO2

Concept: Acid Or a Base in a Water Solution
Chapter: [13] The Acid Base Chemistry
[10]2 | Answer any five of the following:
[2]2.A

Write two applications of sodium bicarbonate (baking soda).

Concept: Chemicals from Common Salt - Preparation and Uses of Baking Soda
Chapter: [13] The Acid Base Chemistry
[2]2.B

Define magnetic lines of force

Concept: Magnetic Force

Write any three properties of magnetic lines of force.

Concept: The Bar Magnet
[2]2.C

Differentiate between Normal elements and Transition elements.

Concept: Trends in the Modern Periodic Table
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[2]2.D

Classify the given sources of water pollution as natural and manmade:

(1) domestic waste
(3) oil spills
(4) ashes released due to forest fires

Concept: Sources of Pollution and Major Pollutant - Water
Chapter: [18] Striving for better Environment 1
[2]2.E

An object is held 20 cm away from a converging lens of focal length 10 cm. Find the position of the image formed.

Concept: Magnification of a Lens
Chapter: [7] Lenses [16] Wonders of Light 1
[2]2.F

What do you understand by the term Scattering of light?

Concept: Some Natural Phenomena Due to Sunlight
Chapter: [17] Wonders of Light 2
[15]3 | Solve any five of the following questions:
[3]3.A

Define corrosion.

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

What is meant by rust?

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

Write the chemical formula of rust.

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

Complete the following table:

 Instrument Number of ConvexLenses Use Simple Microscope .............. .............. Compound Microscope .............. .............. Telescope .............. ..............
Concept: Refraction of Light - Convex Lens
Chapter: [7] Lenses [16] Wonders of Light 1 [16] Wonders of Light 1
[3]3.C
[1]3.C.i

What do you do in the following situations:

Exposed to exhaust fumes in traffic.

Concept: Effects of Air Pollution
Chapter: [18] Striving for better Environment 1
[1]3.C.ii

What do you do in the following situations:

Exposed to a series of firecrackers with high sound level.

Concept: Noise Pollution
Chapter: [18] Striving for better Environment 1
[1]3.C.iii

What do you do in the following situations:

Get turbid drinking water during monsoon.

Concept: Concept of Water Pollution
Chapter: [18] Striving for better Environment 1
[3]3.D

Label the four parts of an electric motor

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

write two uses of DC motor

Concept: Electric Generator - DC
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism
[3]3.E

State any three demerits of Mendeleev’s periodic table.

Concept: Mendeleev’s Periodic Table
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[3]3.F
[1]3.F.i

Draw the electrical symbols of the following components and state its use

Wire crossing

Concept: Electric Current
Chapter: [14] The Electric Spark
[1]3.F.ii

Draw the electrical symbols of the following components and state its use:

Rheostat (variable resistance)

Concept: Electric Current
Chapter: [14] The Electric Spark
[1]3.F.iii

Draw the electrical symbols of the following components and state its use:

Ammeter.

Concept: Electric Current
Chapter: [14] The Electric Spark
[5]4 | Answer any one of the following questions:
[5]4.A

Observe the following figure and answer the questions given under it:

1) How many times does refraction take place in the above figure?

2) What happens to the ray of light when it passes from air to glass?

3) What happens to the ray of light when it passes from glass to air?

4) What are the rays AB and CD in the figure called?

5) Define refraction.

Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab
Chapter: [17] Wonders of Light 2
[5]4.B
[3]4.B.i

Find the expression for the resistivity of a material and state the SI unit of resistivity.

Concept: Ohm’s Law
Chapter: [14] The Electric Spark
[2]4.B.ii

Observe the following figure:

If the current in the coil A is changed, will some current be induced in the coil B? Explain.

Concept: Force Acting on Current Carrying Conductor in a Magnetic Field
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism

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