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Science and Technology 1 Set 1 2019-2020 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

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

Academic Year: 2019-2020
Date & Time: 16th March 2020, 11:00 am
Duration: 2h
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  1. All questions are compulsory.
  2. Use of a calculator is not allowed.
  3. The numbers to the right of the questions indicate full marks.
  4. In case of MCQs (Q. No. 1(A)) only the first attempt will be evaluated and will be given credit.
  5. For each MCQ, the correct alternative (A), (B), (C), (D) with sub-question number is to be written as an answer.
     For Eg: (i) (A), (ii) (B), (iii) (C)
  6. Scientifically correct, labelled diagrams should be drawn wherever necessary.

[10]1
[5]1.A | Write the correct alternative:
[1]1.A.i

According to Mendeleev’s periodic law, properties of elements are periodic function of their _______.

Atomic numbers

Atomic masses

Densities

Boiling points

Concept: undefined - undefined
Chapter: [0.02] Periodic Classification of Elements [0.11] School of Elements
[1]1.A.ii

The vapour content in the air is measured using a physical quantity called ____________.

Absolute humidity

Relative humidity

Dew point

Humidity

Concept: undefined - undefined
Chapter: [0.05] Heat
[1]1.A.iii

For the normal human eye, the near point is at ___________ cm.

10

20

25

30

Concept: undefined - undefined
Chapter: [0.07] Lenses [0.16] Wonders of Light 1
[1]1.A.iv

The astronomical object closest to us is _________ in our galaxy.

Mars

Venus

Jupiter

Moon

Concept: undefined - undefined
Chapter: [0.1] Space Missions
[1]1.A.v

In the Wilfley table method, the particles of gangue are separated by __________ separation method.

Magnetic

Froth floatation

Hydraulic

Gravitational

Concept: undefined - undefined
Chapter:
[5]1.B | Answer the following:
[1]1.B.i

Tell the odd one out. Give a proper explanation.

Voltmeter

Ammeter

Galvanometer

Thermometer

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

Complete the correlation:

Alkene : C = C :: Alkyne: _______.

Concept: undefined - undefined
Chapter: [0.09] Carbon Compounds
[1]1.B.iii

State true or false:

The frequency of AC is 50 Hz.

True

False

Concept: undefined - undefined
Chapter: [0.15] All about Electromagnetism
[1]1.B.iv

Match the Columns:

Column ‘A’ Column ‘B’
The wavelength of red light (a) 600 nm
(b) 700 nm
(c) 500 nm
Concept: undefined - undefined
Chapter: [0.06] Refraction of Light
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[1]1.B.v

Name the first artificial satellite sent by Russia in space.

Concept: undefined - undefined
Chapter: [0.1] Space Missions
[10]2
[4]2.A | Give scientific reasons (any two):
[2]2.A.i

The weight of an object changes from place to place through its mass is constant.

Concept: undefined - undefined
Chapter:
[2]2.A.ii

Write scientific reason.

Stars twinkle but we do not see the twinkling of planets.

Concept: undefined - undefined
Chapter:
[2]2.A.iii

Write scientific reason.

Elements belonging to the same group have the same valency.

Concept: undefined - undefined
Chapter: [0.02] Periodic Classification of Elements
[6]2.B | Answer the following (any three):
[2]2.B.i

How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?

Concept: undefined - undefined
Chapter: [0.05] Heat
[2]2.B.ii

Observe the given figure of Fleming’s Right Hand Rule and write the labels of A and B correctly.

Concept: undefined - undefined
Chapter: [0.04] Effects of Electric Current [0.15] All about Electromagnetism
[2]2.B.iii

Observe the given graph and answer the following questions:

  1. Name the process represented in the figure.
  2. At what temperature does this process take place?
Concept: undefined - undefined
Chapter:
[2]2.B.iv
  • Complete the given chemical reaction:
    \[\ce{CuSO4_{(aq)} + Fe_{(s)} ->}\] _______ + _______
  • Name the type of the reaction.
Concept: undefined - undefined
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
[2]2.B.v

Write a short note on Alloying.

Concept: undefined - undefined
Chapter: [0.03] Chemical Reactions and Equations [0.08] Metallurgy
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[15]3 | Answer the following (any five):
[3]3.A

An element has its electron configuration as 2, 8, 2. Now answer the following question. 

What is the atomic number of this element?

Concept: undefined - undefined
Chapter: [0.02] Periodic Classification of Elements

An element has its electron configuration as 2, 8, 2. Now answer the following question.

What is the group of this element?

Concept: undefined - undefined
Chapter: [0.02] Periodic Classification of Elements

An element has its electron configuration as 2, 8, 2. Now answer the following question.

To which period does this element belong?

Concept: undefined - undefined
Chapter: [0.02] Periodic Classification of Elements
[3]3.B

Observe the given figure showing the orbit of a planet moving around the Sun and write the three laws related to it:


The orbit of a planet moving around the Sun

Concept: undefined - undefined
Chapter: [0.01] Gravitation
[3]3.C

Read the given passage and answer the following questions:

The home electrical connection consists of ‘live’, ‘neutral’ and ‘earth’ wires. The ‘live’ and the ‘neutral’ wires have potential difference of 220 V. The ‘earth’ is connected to ground. Due to a fault in the equipment or if the plastic coating on the ‘live’ and the ‘neutral’ wires gives a way the two wires come in contact with each other and a large current flows through it producing heat. If any inflammable material (such as wood, cloth, plastic, etc.) exists around that place it can catch fire. Therefore a fuse wire is used as a precautionary measure.

  1. Name the two wires having potential difference of 220 V.
  2. What is a short circuit?
  3. Write the function of a fuse.
Concept: undefined - undefined
Chapter: [0.04] Effects of Electric Current
[3]3.D

Observe the given figure and answer the following questions:

  1. Name the process represented by the figure.
  2. State the two laws related to the process.
Concept: undefined - undefined
Chapter:
[3]3.E

What is meant by an artificial satellite? How are the satellites classified based on their functions?

Concept: undefined - undefined
Chapter: [0.1] Space Missions
[3]3.F | Answer the following questions:

Define Hydrocarbons.

Concept: undefined - undefined
Chapter: [0.09] Carbon Compounds

Name the types of Hydrocarbons.

Concept: undefined - undefined
Chapter:

Name two carbon compounds used in day-to-day life.

Concept: undefined - undefined
Chapter:
[3]3.G

Observe the given figure of reactivity series of metals and answer the following questions:


                    Reactivity series of metals

  1. Name two metals which react with water.
  2. Name two moderately reactive metals.
  3. Name the most highly reactive metal and the most less reactive metal.
Concept: undefined - undefined
Chapter: [0.08] Metallurgy
[3]3.H

Complete the following table:

Straight chain of Carbon compounds Structural formula Molecular formula Name
C \[\begin{array}{cc}\ce{H}\\|\\\ce{H - C - H}\\
|\\\ce{H}\end{array}\]
CH4 Methane
C-C ______ ______ Ethane
C-C-C ______ C3H8 ______
C-C-C-C \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\\ce{H - C - C - C - C - H}\\|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}
\end{array}\]
______ ______
Concept: undefined - undefined
Chapter:
[5]4 | Answer any one of the following:
[5]4.A

Draw a scientifically correct labelled diagram of a human eye and answer the questions based on it:

  1. Name the type of lens in the human eye.
  2. Name the screen at which the maximum amount of incident light is refracted?
  3. State the nature of the image formed of the object on the screen inside the eye.
Concept: undefined - undefined
Chapter: [0.07] Lenses [0.16] Wonders of Light 1
[5]4.B

Observe the following picture and answer the following questions:

  1. What is rust?
  2. Write the chemical formula of rust.
  3. Write the reaction of oxidation of iron at the anode.
  4. Write the reaction of oxidation of iron at the cathode.
  5. What is corrosion?
Concept: undefined - undefined
Chapter: [0.03] Chemical Reactions and Equations [0.08] Metallurgy

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