# Science and Technology 1 Set 1 2021-2022 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

Science and Technology 1 [Set 1]
Date & Time: 28th March 2022, 10:30 am
Duration: 2h15m

General Instructions :

1. All questions are compulsory.
2.  Use of a calculator is not allowed.
3. The numbers to the right of the questions indicate fu ll 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), or (D) with a subquestion 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.

 1
 1.A | Write the correct alternative :
 1.A.i

Gold plated ornaments is the example of ______.

Electroplating

Alloying

Anodizing

Galvanizing

Concept: Corrosion of Metals and Its Prevention
Chapter: [0.03] Chemical Reactions and Equations [0.08] Metallurgy
 1.A.ii

The functioning of the satellite launch vehicle is based on ______.

Newton's first law of motion

Newton's second law of motion

Newton's third law of motion

Newton's universal law of gravitation

Concept: Launching of Satellite
Chapter: [0.1] Space Missions
 1.A.iii

_______ is one of the combustible components of L.P.G.

Methane

Ethane

Propane

Butanol

Concept: Nomenclature of Organic Compounds (IUPAC)
Chapter: [0.09] Carbon Compounds
 1.A.iv

The power of a convex lens of focal length 25 cm is ______.

4.0 D

0.25 D

−4.0 D

−0.25 D

Concept: Lens
Chapter: [0.07] Lenses
 1.A.v

______ colour is deviated the least in the spectrum of white light obtained with a glass prism.

Red

Yellow

Violet

Blue

Concept: Dispersion of Light Through Prism and Formation of Spectrum
Chapter: [0.06] Refraction of Light
 1.B | Answer the following :
 1.B.i

Find the odd one out:

INSAT

GSAT

IRS

PSLV

Concept: Types of Satellite
Chapter: [0.1] Space Missions
 1.B.ii

Complete the correlation:

Group 1 : Alkali metals : : ______ : Halogens.

Concept: Study of Specific Groups in Periodic Table - Group VIIA Or Group 17 (The Halogens)
Chapter: [0.02] Periodic Classification of Elements
 1.B.iii

Match the correct pair:

 Column ‘A’ Column ‘B’ Refractive index of water (a) 1.31 (b) 1.36 (c) 1.33
Concept: Refractive Index
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2
 1.B.iv

State whether the following statement is true or false.

An electric motor converts mechanical energy into electrical energy.

True

False

Concept: Electric Motor
Chapter: [0.04] Effects of Electric Current [0.15] All about Electromagnetism
 1.B.v

Write the IUPAC name for the following structural formula:

$\begin{array}{cc} \ce{CH3-CH-CH3}\\ |\phantom{..}\\ \ce{OH} \end{array}$

Concept: Nomenclature of Organic Compounds (IUPAC)
Chapter: [0.09] Carbon Compounds
 2
 2.A | Give scientific reasons (any two) :
 2.A.i

Write scientific reason.
Atomic radius goes on increasing down a group.

Concept: Periodic Properties - Periodic Properties: Atomic Radius Or Atomic Size
Chapter: [0.02] Periodic Classification of Elements
 2.A.ii

Give scientific reason.

Simple microscope is used for watch repairs.

Concept: Magnification Due to Spherical Lenses
Chapter: [0.07] Lenses [0.16] Wonders of Light 1
 2.A.iii

Give scientific reason.

It is reccommended to use air tight container for storing oil for long time.

Concept: Oxidation, Reduction and Redox Reactions
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
 2.B | Answer the following questions (any three) :
 2.B.i

An object takes 5 s to reach the ground from a height of 5 m on a planet. What is the value of g on the planet?

Concept: Acceleration Due to Gravity (Earth’s Gravitational Acceleration)
Chapter: [0.01] Gravitation
 2.B.ii

Draw a neat labelled diagram of Hope's Apparatus.

Concept: Hope’s Experiment to Demonstrate the Anomalous Expansion of Water
Chapter: [0.05] Heat
 2.B.iii

State the laws of refraction of light.

Concept: Refraction of Light Through a Rectangular Glass Slab
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2 [0.17] Wonders of Light 2
 2.B.iv
 2.B.iv.a

Name the following: Main ore of aluminium.

Concept: Extraction of Metals
Chapter: [0.08] Metallurgy
 2.B.iv.b

What impurities are present in aluminium ore?

Concept: Extraction of Aluminium
Chapter: [0.08] Metallurgy
 2.B.v

Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B': Concept: Force on a Current Carrying Conductor in a Magnetic Field
Chapter: [0.04] Effects of Electric Current [0.15] All about Electromagnetism
 3 | Answer the following (any five) :
 3.A

What are the demerits of Mendeleev’s periodic table?

Concept: Mendeleev’s Periodic Table
Chapter: [0.02] Periodic Classification of Elements [0.11] School of Elements
 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: Kepler’s Laws
Chapter: [0.01] Gravitation
 3.C
 3.C.i

Identify the type of chemical reaction given below:

$\ce{CuSO4 + Fe -> FeSO4 + Cu}$

Concept: Types of Chemical Change or Chemical Reaction - Single Displacement Reactions
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
 3.C.ii

Identify the type of chemical reaction given below:

$\ce{2Mg + O2 -> 2MgO}$

Concept: Oxidation, Reduction and Redox Reactions
Chapter: [0.03] Chemical Reactions and Equations [0.12] The Magic of Chemical Reactions
 3.C.iii

Identify the type of chemical reaction given below:

$\ce{2KClO3 -> 2KCl + 3O2 ^}$

Concept: Energy Change in Chemical Reactions
Chapter: [0.03] Chemical Reactions and Equations
 3.D

If in a medium, the speed of light is 1.5 × 108 m/s how much will the absolute refractive index of that medium be?

Concept: Refractive Index
Chapter: [0.06] Refraction of Light [0.17] Wonders of Light 2
 3.E

 If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box, then no energy can flow from inside the box or come into the box.
1. Heat is transferred from where to where?
2. Which principle do we learn about from this process?
3. How will you state the principle briefly?
Concept: Hot and Cold Objects
Chapter: [0.05] Heat
 3.F

Complete the following table for convex lens:

 Sr. No. Position of the object Position of the image Nature of the image 1. Beyond 2F1 __________________ ________________________ 2. __________________ At infinity ________________________ 3. __________________ __________________ Real, inverted and enlarged
Concept: Images Formed by Sperical Lenses
Chapter: [0.07] Lenses [0.16] Wonders of Light 1
 3.G
 3.G.i

Explain the following term:

Metallurgy

Concept: Metallurgy
Chapter: [0.08] Metallurgy
 3.G.ii

Explain the term of Ores .

Concept: Types of Separation or Concentration of an Ore
Chapter: [0.08] Metallurgy
 3.G.iii

Explain the term  Gangue .

Concept: Types of Elements: Non-metal
Chapter: [0.08] Metallurgy
 3.H

State the importance of Space Missions.

Concept: Space Missions
Chapter: [0.1] Space Missions
 4 | Answer any one of the following :
 4.A

Observe the following diagram and answer the questions given below: 1. Identify the above diagram.
2. Write the principle on which the above appliance works.
3. Write the working of the above appliance.
4. Write the use of the above appliance.
Concept: Electric Generator
Chapter: [0.04] Effects of Electric Current
 4.B
 4.B.i

Identify saturated and unsaturated hydrocarbons from the given structural formula:

 $\begin{array}{cc}\phantom{}\ce{H}\phantom{..}\ce{H}\phantom{}\\\phantom{}|\phantom{...}|\phantom{}\\\ce{H-C-C-H}\\\phantom{}|\phantom{...}|\phantom{}\\\phantom{}\ce{H}\phantom{..}\ce{H}\phantom{}\end{array}$ $\begin{array}{cc}\phantom{..}\ce{H}\phantom{........}\ce{H}\phantom{.}\\\phantom{.}\backslash\phantom{......}/\phantom{}\\\ce{C = C}\\\phantom{}/\phantom{......}\backslash\phantom{}\\\phantom{}\ce{H}\phantom{........}\ce{H}\phantom{}\end{array}$ (1) (2)
Concept: Hydrocarbons
Chapter: [0.09] Carbon Compounds
 4.B.ii

Draw electron dot structure for the following:

$\begin{array}{cc} \phantom{}\ce{H}\phantom{..}\ce{H}\phantom{}\\ \phantom{}|\phantom{...}|\phantom{}\\ \ce{H-C-C-H}\\ \phantom{}|\phantom{...}|\phantom{}\\ \phantom{}\ce{H}\phantom{..}\ce{H}\phantom{} \end{array}$

Concept: Hydrocarbons
Chapter: [0.09] Carbon Compounds

Draw electron dot structure for the following:

$\begin{array}{cc} \phantom{..}\ce{H}\phantom{........}\ce{H}\phantom{.}\\ \phantom{.}\backslash\phantom{......}/\phantom{}\\ \ce{C = C}\\ \phantom{}/\phantom{......}\backslash\phantom{}\\ \phantom{}\ce{H}\phantom{........}\ce{H}\phantom{} \end{array}$

Concept: Hydrocarbons
Chapter: [0.09] Carbon Compounds
 4.B.iii

Define Homologous series.

Concept: Homologous Series of Carbon Compound
Chapter: [0.09] Carbon Compounds

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