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Science and Technology 1 2015-2016 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

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Science and Technology 1
Marks: 40 Maharashtra State Board
SSC (English Medium)
SSC (Marathi Semi-English)

Academic Year: 2015-2016
Date: July 2016
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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

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

Concept: undefined - undefined
Chapter: [0.14] The Electric Spark
[1]1.A.a.ii

The phenomenon of splitting of light into its component colours is ___________ .

Concept: undefined - undefined
Chapter: [0.06] Refraction of Light
[2]1.A.b | State whether the following statements are true or false:
[1]1.A.b.i

Phenolphthalein is a synthetic type of indicator.

True

False

Concept: undefined - undefined
Chapter: [0.13] The Acid Base Chemistry
[1]1.A.b.ii

The chemical reactions in which heat is liberated are called endothermic reactions.

True

False

Concept: undefined - undefined
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
[1]1.A.c | Name the following:
The instrument used to observe planets.
Concept: undefined - undefined
Chapter:
[5]1.B | Rewrite the following statements by selecting the correct options:
[5]1.B.a
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[1]1.B.a.i
When the resistance of a conductor increases, the current ____________ .

increases

decreases

remains the same

increases or decreases
Concept: undefined - undefined
Chapter: [0.04] Effects of Electric Current
[1]1.B.a.ii

The phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.

dispersion

scattering

Refraction

Reflection

Concept: undefined - undefined
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2
[1]1.B.a.iii

When _______________ is passed through fresh lime water, it turns milky.

H2

CO2

CO

SO2

Concept: undefined - undefined
Chapter: [0.13] The Acid Base Chemistry
[1]1.B.a.iv

A _____________ mirror is used by a dentist.

concave

convex

plane

none of the above.

Concept: undefined - undefined
Chapter: [0.16] Wonders of Light 1 [0.16] Wonders of Light 1
[1]1.B.a.v

The equivalent resistance of a parallel combination of two resistors of 30 Ω and 60 Ω is ______________.

90 Ω

2 Ω

20 Ω

1800 Ω

Concept: undefined - undefined
Chapter: [0.14] The Electric Spark
[10]2 | Attempt any five of the following:
[2]2.A

The velocity of light in a medium is 1.5 x 188 m/s. What is the refractive index of the medium with respect to air, if the velocity in the air is 3 x 108 m/s?

Concept: undefined - undefined
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2
[2]2.B

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

Concept: undefined - undefined
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
[2]2.C

Write a short note on Eutrophication.

Concept: undefined - undefined
Chapter: [0.18] Striving for better Environment 1
[2]2.D
Classify the given elements into metals, non - metals, and metalloids. :
Carbon, Boron, Sodium, Oxygen.
Concept: undefined - undefined
Chapter: [0.08] Metallurgy
[2]2.E

State Fleming’s Right Hand Rule.

Concept: undefined - undefined
Chapter: [0.04] Effects of Electric Current [0.15] All about Electromagnetism
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[2]2.F
Distinguish between oxidation and reduction.
Concept: undefined - undefined
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
[15]3 | Attempt any five of the following questions:
[3]3.A
Aniket from Std. X uses spectacles. The power of the lenses in his spectacles is - 0.5 dioptre.
Answer the following questions:
  1. State the type of lenses used in his spectacles.
  2. Name the defect of vision Aniket is suffering from.
  3. Find the focal length of the lenses used in his spectacles.
Concept: undefined - undefined
Chapter:
[3]3.B

What are the demerits of Mendeleev’s periodic table?

Concept: undefined - undefined
Chapter: [0.02] Periodic Classification of Elements [0.11] School of Elements
[3]3.C

Explain how the formation of a rainbow occurs.

Concept: undefined - undefined
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2
[3]3.D
State the different positions of the source of light with respect to the concave mirror in Torches.
Concept: undefined - undefined
Chapter: [0.16] Wonders of Light 1 [0.16] Wonders of Light 1
State the different positions of the source of light with respect to the concave mirror in Projector lamps.
Concept: undefined - undefined
Chapter: [0.16] Wonders of Light 1 [0.16] Wonders of Light 1
State the different positions of the source of light with respect to the concave mirror in Floodlights.
Concept: undefined - undefined
Chapter: [0.16] Wonders of Light 1 [0.16] Wonders of Light 1
[3]3.E

What major harm is done to human beings by air pollution?

Concept: undefined - undefined
Chapter: [0.18] Striving for better Environment 1
[3]3.F

Explain the pH scale with the proper diagram.

Concept: undefined - undefined
Chapter: [0.13] The Acid Base Chemistry [0.13] The Acid Base Chemistry
[5]4 | Attempt any one of the following:
[5]4.A

When do you say that the resistors are connected in this way? Draw a circuit diagram.

Concept: undefined - undefined
Chapter: [0.14] The Electric Spark
[5]4.B

Explain the construction and working of an electric generator (AC) with the help of a neat diagram.

Concept: undefined - undefined
Chapter: [0.15] All about Electromagnetism

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