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Science and Technology 1 2013-2014 SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] Question Paper Solution

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Science and Technology 1
Marks: 40Academic Year: 2013-2014
Date: October 2013

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

Fill in the Blank and Rewrite the Statements:

Elements showing properties of both metals and nonmetals are known as _________.

Concept: Types of Elements: Non-metal
Chapter: [8] Metallurgy [8] Metallurgy
[1]1.A.a.ii

The device used for producing electric current is called _________.

Concept: Electromagnetic Induction
Chapter: [15] All about Electromagnetism
[2]1.A.b

Rewrite the following table so as to match second and third column with first column.

 

Column I
Column II
Column III
(i) Myopia
Old age problem
Bifocal lens
(ii) Presbyopia
Nearsightedness
Concave lens.
Concept: Defects of Vision and Their Correction
Chapter: [16] Wonders of Light 1
[1]1.A.c

State whether the following statement is True or False:

The SI unit of charge is the coulomb. 

True

False

Concept: Electric Current
Chapter: [14] The Electric Spark
[5]1.B
[1]1.B.a

Choose the correct alternative and rewrite the following sentence.

Phenolphthalein is ___________ type of indicator. 

Natural Indicator

Universal Indicator

Synthetic Indicator

None of the above.

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

Choose the correct alternative and rewrite the following sentence.

Which of the following is not required to find the pH of a given solution? 

pH paper

Litmus paper

Standard pH value chart

Universal indicator
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]1.B.c

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
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[1]1.B.d

Choose the correct alternative and rewrite the following sentence.

If three resistors 2 ohms, 3 ohms and 4 ohms are connected in series, then the effective resistance in the circuit will be _______ ohms.

9

6

1

5

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

Choose the correct alternative and rewrite the following sentence.

A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?

50°

90°

60°

40°

Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab
Chapter: [17] Wonders of Light 2
[10]2 | Attempt any FIVE of the following questions.
[2]2.A

State Mendeleev's periodic law.

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

Answer the following question:

Name two elements having a single electron in their outermost shell. 

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

Answer the following question:

Grills of doors and windows are always painted before they are used? Give reason.

Concept: Concept of Chemical Reactions - Types of Chemical Reactions - Neutralization
Chapter: [12] The Magic of Chemical Reactions
[2]2.D

State the laws of refraction of light. 

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

Draw the diagram of refraction of light in the glass slab

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

Answer the following question:

Name two human diseases caused due to water pollution.  

Concept: Concept of Water Pollution
Chapter: [18] Striving for better Environment 1
[15]3 | Attempt any FIVE of the following questions:
[3]3.A

 Answer the following:

What is corrosion? Do gold ornaments corrode? Justify.  

Concept: Concept of Chemical Reactions - Types of Chemical Reactions - Neutralization
Chapter: [12] The Magic of Chemical Reactions
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[3]3.B

Answer the following:

If pH value of solution ‘A’ is 8, pH value of solution ‘B’ is 7 and pH value of solution ‘C’ is 5.5 then:

(i) Which solution is acidic?
(ii) Which solution is basic?
(iii) Which solution is neutral?
Concept: Concept of Ph Scale
Chapter: [13] The Acid Base Chemistry
[3]3.C

Name safety measures commonly used in electric circuits and appliances.

Concept: Domestic Electric Circuits
Chapter: [15] All about Electromagnetism
[3]3.D

Answer the following:

What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light. 

Concept: Dispersion of Light
Chapter: [6] Refraction of Light
[3]3.E

Answer the following:

State the principles of the electric motor and electric generator. 

Concept: Electromagnetic Induction
Chapter: [15] All about Electromagnetism
[3]3.F

Explain the role of citizen in pollution control.

Concept: Abatement of Pollution
Chapter: [18] Striving for better Environment 1
[5]4 | Attempt any ONE of the following:
[5]4.A
[3]4.A.a

What should I choose ___________________

a. for decreasing resistance in a circuit.
(Resistors in series / Resistors in parallel)

b. for getting protection from electric current.
(Nickel / Ebonite)

c. to measure the current in the circuit?
(Ammeter/ Voltmeter) 
Concept: Electric Current
Chapter: [14] The Electric Spark
[2]4.A.b

My mother was operating washing machine on Sunday morning. Suddenly, she saw a spark coming out of the electric board and the electric current in the house failed. An electrician was called to look into the matter. What should he have noticed.

Concept: Electric Current
Chapter: [14] The Electric Spark
OR
[5]4.B
[3]4.B.a

In which equipment/s do you find ___________________

(i) a concave mirror.
(ii) a convex lens
(iii) reflecting mirrors?
Concept: Concave Mirror
Chapter: [16] Wonders of Light 1 [16] Wonders of Light 1
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[2]4.B.b

My grandfather uses a bifocal lens in his spectacle. Explain why.

Concept: Refraction of Light - Refraction by Spherical Lenses
Chapter: [16] Wonders of Light 1
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