Science and Technology 1 Balbharati Model Question Paper Set 3 2018-2019 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

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

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

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

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

Observe the following figure which bulb get fuse?

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

a) 𝐹₁ = 𝐹₂ 

b) 𝐹₁ > 𝐹₂ 

c) 𝐹₁ < 𝐹₂ 

d) 𝐹₁ ≠ 𝐹₂ 

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.

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

Choose and write the correct option.

What is the type of the following reaction?

BaCl₂ + ZnSO₄ →  BaSO₄ + ZnCl₂

 Displacement

combination

decomposition

 double displacement

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

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

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

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?

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.

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.

Complete the following flow chart. 

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

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

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

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

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

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.

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.

Write the IUPAC names of the following structural formulae.

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

Explain the following temperature vs time graph.

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?

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.

Answer the following question.
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.