# Science and Technology 1 Balbharati Model Question Paper Set 3 2018-2019 SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] Question Paper Solution

Science and Technology 1 [Balbharati Model Question Paper Set 3]
Date: March 2019

[10]1 | Attempt the following
[5]1.1 | A) Solve the following questions
[1]1.1.i

For freely falling object we can write the Newton’s second equation of motion as …..

Concept: Earth’s Gravitational Acceleration
Chapter: [1] Gravitation
[1]1.1.ii

Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X

Concept: Types of Element: Metals
Chapter: [2] Periodic Classification of Elements [8] Metallurgy [8] Metallurgy
[1]1.1.iii

When heat energy is absorbed by object ΔT represents the raise in temperature. What would be ΔT represent if the object loses heat energy?

Concept: Measurement of Specific Heat: (Mixing Method) and Calorimeter
Chapter: [5] Heat
[1]1.1.iv

Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3

Concept: Types of Element: Metals
Chapter: [2] Periodic Classification of Elements [8] Metallurgy [8] Metallurgy
[1]1.1.v

Observe the following figure which bulb get fuse?

Concept: Energy Transfer in an Electric Circuit
Chapter: [4] Effects of Electric Current
[5]1.2 | Choose and write the correct option.
[1]1.2.i

Yesh find out F1 and F2 of symmetric convex lens experimentally then which conclusion is true.

a) 𝐹1 = 𝐹

b) 𝐹1 > 𝐹

c) 𝐹1 < 𝐹

d) 𝐹1 ≠ 𝐹

Concept: Refraction of Light - Convex Lens
Chapter: [7] Lenses [16] Wonders of Light 1 [16] Wonders of Light 1
[1]1.2.ii

Choose and write the correct option.

If we gradually increase the angle of incidence of a ray of light passing through prism then …..

Angle of deviation goes on decreasing.

Angle of deviation decreases but after certain value of incident angle, deviation angle increases

Angle of deviation goes on increasing.

Angle of deviation increases but after certain value of incident angle deviation angle decreases.

Concept: Refraction of Light
Chapter: [6] Refraction of Light [17] Wonders of Light 2
[1]1.2.iii

Choose and write the correct option.

Which type of carbon-carbon bonds are present in Vanaspati ghee?

a) Single

b) double

c) triple

d) single-double

Concept: Bonding in Carbon - Covalent Bond
Chapter: [9] Carbon Compounds
[1]1.2.iv

Choose and write the correct option.

What is the type of the following reaction?

BaCl+ ZnSO4 →  BaSO4 + ZnCl2

Displacement

combination

decomposition

double displacement

Concept: Types of Chemical Reactions - Double Displacement Reaction
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
[1]1.2.v

Choose and write the correct option.

Which of the following astronauts travelled through space shuttle ‘Discovery’ first time?

a) Kalpana Chawala

b) Rakesh Sharma

c) Sunita Williams

d) Neil Armstrong

Concept: India’s Space Programmes: Mangalyaan (Mars vehicle)
Chapter: [10] Space Missions
[10]2 | Solve any five of the following questions.
[2]2.1

Which of this element belong to the period 3? Write their electronic configuration

3^(Li) , 14^(Si) , 2^(He) , 15^(P)

Concept: Periods and Electronic Configuration
Chapter: [2] Periodic Classification of Elements
[2]2.2

Solve the example.
If the speed of light in a medium is 1.5 × 108 m/s, what is the absolute refractive index of the medium?

Concept: Refraction of Light - Refractive Index
Chapter: [6] Refraction of Light [17] Wonders of Light 2
[2]2.3

Prove the statement .

If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that, i = e.

Concept: Refraction of Light - Refractive Index
Chapter: [6] Refraction of Light [17] Wonders of Light 2
[2]2.4

At which position will you keep an object in front of convex lens to get a real image smaller than the object? Draw a figure.

Concept: Magnification of a Lens
Chapter: [7] Lenses [16] Wonders of Light 1
[2]2.5

Complete the following flow chart.

Concept: Macro Molecules and Polymers
Chapter: [9] Carbon Compounds
[2]2.6

Why are geostationary satellites not useful for studies of polar regions?

Concept: Orbits of Artificial Satellites
Chapter: [10] Space Missions
[2]2.7

Write the proper name of the orbits of satellites shown in the following figure with their height from the earth’s surface.

Concept: High Earth Orbits : (Height from the earth’s surface > 35780 km)
Chapter: [10] Space Missions
[15]3 | Solve any five of the following questions
[3]3.1

The radius of planet A is half the radius of planet B. If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A?

Concept: Variation in Value of g
Chapter: [1] Gravitation
[3]3.2

Study the radius of the element given below and answer the following questions.

 elements K Na Rb Cs Li Atomic radius (pm) 231 186 244 262 151

a) Which of above element have smallest atom?
b) In which group of modern periodic table the above element are belongs?
c) What is the periodic trend observed in the variation of atomic radii down a group?

Concept: Atomic Size
Chapter: [2] Periodic Classification of Elements
[3]3.3

Study the following figure and answer questions.

a) After heating Calcium carbonate, which gas is formed in a test tube?
b) When we pass this gas through limewater what change, did you observe?
c) Write down the chemical reaction showing the product formation after heating the Calcium carbonate.

Concept: Types of Chemical Reactions - Decomposition Reactions
Chapter: [3] Chemical Reactions and Equations [12] The Magic of Chemical Reactions
[3]3.4

Give scientific reasons.
While preparing dil. Sulphuric acid from concentrated conc. sulphuric acid in the laboratory the concentrated sulphuric acid is, add slowly to water with constant stirring.

Concept: Endothermic and Exothermic Reactions
Chapter: [3] Chemical Reactions and Equations
[3]3.5

Write the IUPAC names of the following structural formulae.

i. CH3- CH2- CH2- CH3
ii. CH3- CH2- COOH
iii. CH3 – CO- CH2- CH

Concept: Iupac Nomenclature System
Chapter: [9] Carbon Compounds
[3]3.6

Explain the following temperature vs time graph.

Concept: Latent Heat
Chapter: [5] Heat
[3]3.7

Observer the following diagram and answer the questions.
a) Which eye defect is shown in this diagram?
b) What are the possible reasons for this eye defect?
c) How this defect is corrected, write it in brief?

Concept: Defects of Vision and Their Corrections - Nearsightedness/ Myopia
Chapter: [7] Lenses
[5]4 | (any One)
[5]4.1

Study the following principle and answer the question.
A force is excreted on the current carrying conductor. The direction of this force depends on both the direction of the current and the direction of the magnetic field. This force is maximum when the direction of current is perpendicular to the direction of the magnetic field.
a) By which law we can determine the direction of force excreted on the current carrying conductor.
b) In which electrical equipment this principle is used.
c) Draw a diagram representing construction of this equipment.
d) Write the working of this equipment in brief.

Concept: Electric Motor
Chapter: [4] Effects of Electric Current [15] All about Electromagnetism
[5]4.2

a) What is meant by corrosion?
b) Write names of any two methods of prevention of corrosion.
c) In which method, metal like copper, aluminium are coated with a thin layer of their oxides by means of electrolysis.
d) Explain this method with diagram.

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

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