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Science and Technology 1 2016-2017 SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] Question Paper Solution

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Science and Technology 1
Marks: 40Academic Year: 2016-2017
Date: July 2017

SECTION A
[10]1
[5]1.A | Answer the following sub - questions:
[2]1.A.a | Fill in the blanks and rewrite the completed statements:
[1]1.A.a.i

Fill in the blank and rewrite the completed statement:

________ group in the periodic table contains elements that are all gases at room temperature.

Concept: Trends in the Modern Periodic Table
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[1]1.A.a.ii

Fill in the blank and rewrite the completed statement:

Very fine particles mainly scatter ______ light.

Concept: Some Natural Phenomena Due to Sunlight
Chapter: [17] Wonders of Light 2
[2]1.A.b | State whether the following statements are true or false:
[1]1.A.b.i

State whether the following statement is true or false:
Magnetic poles exist in pairs.

True

False

Concept: Magnetic Force
Chapter: [15] All about Electromagnetism
[1]1.A.b.ii

State whether the following statement is true or false:
Global warming is a desirable aspect of the intensified greenhouse effect.

True

False

Concept: Effects of Air Pollution
Chapter: [18] Striving for better Environment 1
[1]1.A.c

Considering the relationship in the first pair, complete the second paie :

AgCI : White :: CuI2 : ___________

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
[5]1.B | Rewrite the following statements by selecting the correct options:
[1]1.B.a

Rewrite the following statement by selecting the correct option.

The S.I. unit of resistance is __________.

Ohm

Ampere

Coulomb

Volt

Concept: Ohm’s Law
Chapter: [14] The Electric Spark
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[1]1.B.b

Rewrite the following statement by selecting the correct option:

If a ray of light strikes a glass slab at an angle of 600 with the surface of the slab, the angle of incidence must be __________________.

60°

30°

40°

120°

Concept: Refraction of Light - Refraction Through a Rectangular Glass Slab
Chapter: [17] Wonders of Light 2
[1]1.B.c
Rewrite the following statement by selecting the correct option:
________________ is a decomposition reaction.

Fe + S ⟶ FeS.

HCl + NaOH ⟶ NaCl + H2O

CuSO4 + Zn ⟶ ZnSO4 + Cu

\[\ce{CaCO3 ->[\Delta]CaO + CO2}\]

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

Rewrite the following statement by selecting the correct option:

1 A = ____________ mA.

102

10-2

103 

10-3

Concept: Heating Effect of Electric Current
Chapter: [4] Effects of Electric Current [14] The Electric Spark
[1]1.B.e
Rewrite the following statement by selecting the correct option:
The power of a convex lens is 2.5 dioptres. Its focal length is ______________.

40 cm

25 cm

`1/40` cm.

`1/25` cm

Concept: Refraction of Light - Convex Lens
Chapter: [7] Lenses [16] Wonders of Light 1 [16] Wonders of Light 1
[10]2 | Attempt any five of the following question:
[2]2.A

Answer the following question.
Name any two historical monuments affected by acid rain.

Concept: Effects of Air Pollution
Chapter: [18] Striving for better Environment 1
[2]2.B
Give Scientific Reason:
Atomic size increase down the group.
Concept: Trends in the Modern Periodic Table
Chapter: [2] Periodic Classification of Elements [11] School of Elements
[2]2.C

Answer the following question:
Distinguish between the convex mirror and the concave mirror.

Concept: Spherical Mirrors
Chapter: [16] Wonders of Light 1
[2]2.D

Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.

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

Answer the following question:
What is the universal indicator? Does Mg (OH)2 react with sodium hydroxide? If not, why?

Concept: Chemical Properties of Acids and Bases
Chapter: [13] The Acid Base Chemistry
[2]2.F
Suggest measures in the following situation:
The use of fossil fuels in villages.
Concept: Sustainable Use of Resources
Chapter: [18] Striving for better Environment 1
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[15]3 | Attempt any five of the following questions:
[3]3.A

Answer the following question:
Find the expression for the resistivity of a material.

Concept: Electric Potential Difference
Chapter: [14] The Electric Spark
[3]3.B

Answer the following question:
What is corrosion? Do gold ornaments corrode? Justify.

Concept: Concept of Corrosion of Metals and Its Prevention
Chapter: [8] Metallurgy [8] Metallurgy
[3]3.C

Answer the following question:
What is overloading? When does it occur? How can overloading be avoided?

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

Answer the following question:
what is the heating effect of the electric current? state any four applications of it?

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

Answer the following question:
How do acids and bases react with each other? What is the name of the process? What product is obtained from these reactions?

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
[3]3.F

Answer the following question:
State the effect on the magnetic needle in Oersted’s experiment when:  
(a) the current is passed through the wire.  
(b) the current through the wire is increased
(c) the current through the wire is reversed. 

Concept: Magnetic Effect of a Current
Chapter: [4] Effects of Electric Current
[5]4 | Answer any one of the following questions:
[5]4.A
[3]4.A.a

Anuja cannot see the blackboard writing but she can see nearby things.
(a) What is the eye defect she is suffering from?
(b) State the possible reason for her defect.
(c) How is it corrected

Concept: Defects of Vision and Their Corrections - Nearsightedness/ Myopia
Chapter: [7] Lenses
[2]4.A.b

Anuja’s father cannot see nearby objects clearly.
(a) What is the eye defect he is suffering from?
(b) How is it corrected?

Concept: Presbyopia
Chapter: [7] Lenses
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OR
[5]4.B

Answer the following question:
Explain the term ‘refraction’. State the laws of refraction. Write the refractive index of benzene and diamond. 

Concept: Laws of Refraction
Chapter: [6] Refraction of Light
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