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Science and Technology 1 2014-2015 SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] Question Paper Solution

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Science and Technology 1
Marks: 40Academic Year: 2014-2015
Date: July 2015

Section-A
[10]1
[5]1.A
[2]1.A.a
[1]1.A.a.i

Fill in the blank:

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

Concept: Some Natural Phenomena Due to Sunlight
Chapter: [17] Wonders of Light 2
[1]1.A.a.ii

Fill in the blank :

1 mA = ............................. A.

Concept: Electric Current
Chapter: [14] The Electric Spark
[3]1.A.b | Match the column ‘A’ with column ‘B’.

Match the column ‘A’ with column ‘B’.

Column ‘A’
Column ‘B’
(1) Eka - boron
(a) Germanium
(2) Eka - Aluminium
(b) Scandium
(3) Eka - Silicon
(c) Gallium
Concept: Energy Transfer in an Electric Circuit
Chapter: [4] Effects of Electric Current
[5]1.B
[1]1.B.a

Choose the correct alternative and rewrite the following:

Mirror used by a dental surgeon is ..........................

plane

convex

concave

convex and concave

Concept: Spherical Mirrors
Chapter: [16] Wonders of Light 1
[1]1.B.b

Choose the correct alternative and rewrite the following:

What will happen to the current passing through a resistance, if the potential difference across it is doubled and the resistance is halved?

remains unchanged

becomes double

becomes half

becomes four times

Concept: Magnetic Force
Chapter: [15] All about Electromagnetism
[1]1.B.c

Choose the correct alternative and rewrite the following:

You are given three equal resistances. In how many combinations can they are arranged?

Three

Four

Five

Two

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

Choose the correct alternative and rewrite the following: 

Inside water, an air bubble behaves ....................

always like a flat plate

always like a concave lens

always like a convex lens

always like a concave mirror

Concept: Refraction of Light - Concave Lens
Chapter: [7] Lenses [7] Lenses
[1]1.B.e

Choose the correct alternative and rewrite the following:

A glass slab is placed in the path of convergent light. The point of convergence of light

moves away from the slab

moves towards the slab

remains at the same point

undergoes lateral shift

Concept: Refraction of Light - Refraction of Light Through a Glass Block and a Triangular Prism
Chapter: [17] Wonders of Light 2
[10]2 | Attempt any five following questions.
[2]2.A

State Dobereiner’s Triads giving one example.

Concept: Dobereiner’s Triads
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[2]2.B

Edible oil is not allowed to stand for a long time in an iron or tin container.

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

An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?

Concept: Electric Power
Chapter: [14] The Electric Spark
[2]2.D

Differentiate between Conductors and insulators.

Concept: Force Acting on Current Carrying Conductor in a Magnetic Field
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism
[2]2.E

Draw a labelled diagram: Dispersion of light through a prism.

Concept: Dispersion of Light
Chapter: [6] Refraction of Light
[15]3 | Attempt any five following questions.
[3]3.A

If sodium chloride is added to the silver nitrate solution:

a. which precipitate is formed?
b. name the type of reaction.
c. write the chemical equation.

Concept: Types of Chemical Reactions - Double Displacement Reaction
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
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[3]3.B
[1]3.B.a

Define: Chemical combination reaction 

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

Define: Endothermic reaction 

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
[1]3.B.c

Define Oxidation reaction.

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

State two uses of a concave mirror. 

Concept: Spherical Mirrors
Chapter: [16] Wonders of Light 1
[3]3.D

Name any six domestic appliances based on the heating effect of electric current.

Concept: Heating Effect of Electric Current
Chapter: [4] Effects of Electric Current [14] The Electric Spark
[3]3.E

Explain: ‘How is a rainbow formed’?

Concept: Some Natural Phenomena Due to Sunlight
Chapter: [17] Wonders of Light 2
[3]3.F

If an object is placed in front of a convex lens beyond 2F1, then what will be the position, relative size, and nature of an image which is formed? Explain with a ray diagram.

Concept: Refraction of Light - Convex Lens
Chapter: [7] Lenses [16] Wonders of Light 1 [16] Wonders of Light 1
[5]4 | Attempt any one following questions.
[5]4.A

Explain ‘Electric generator’ with the help of the following points:

  1. Diagram of an AC Generator with labelling
  2. Principle of an electric generator
  3. The function of slip rings
  4. Any two uses of a generator.
Concept: Alternating Current (AC) and Direct Current (DC)
Chapter: [4] Effects of Electric Current
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[5]4.B

Write about the sources of noise pollution. Give the impact of noise pollution on the human body.

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