SSC Maharashtra Board Science 1 Question Paper July 2023 with Answers

Maharashtra Board SSC Class 10 Science 1 Question Paper July 2023 with Answers Solutions Pdf Download.

SSC Science 1 Question Paper July 2023 with Answers Pdf Download Maharashtra Board

Time: 2 Hours
Total Marks: 40

Note:

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) or (D) with 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.

Question 1.
(A) Choose the correct alternative and write the correct option: [5]
i. _________ has the highest refractive index. (D)
(A) Air
(B) Water
(C) Glass
(D) Diamond
Answer:
(D) Diamond

ii. The left hand side of a chemical reaction represents _________. (B)
(A) Product
(B) Reactants
(C) Catalyst
(D) Indicator
Answer:
(B) Reactants

iii. In _________ block of the modern periodic table non-metals are found. (C)
(A) s-block
(B) d-block
(c) p-block
(D) f-block
Answer:
(c) p-block

iv. The chemical reaction in which two or more products are formed from a single reactant is called _________ reaction. (A)
(A) Decomposition
(B) Combination
(C) Displacement
(D) Double displacement
Answer:
(A) Decomposition

v. If the refractive index of glass with respect to air is \(\frac{3}{2}\), the refractive index of air with respect to glass is _________. (D)
(A) \(\frac{1}{2}\)
(B) 3
(C) \(\frac{1}{3}\)
(D) \(\frac{2}{3}\)
Answer:
(D) \(\frac{2}{3}\)

(B) Attempt the following questions: [5]
i. State whether the given statement is true or false:
Rancidity is oxidation process.
ii. Find the odd man out:
Camera, Telescope, Peephole in door, Microscope
iii. Find the co-relation:
Resistance : Ohm :: Potential difference :
iv. Write the defect of eye from the given figure:

v. Give the unit of intensity of magnetic field.
Answer:
i. True
ii. Peephole in door.
iii. Resistance : Ohm :: Potential difference : Volt
iv. Hypermetropia
v. oersted

Question 2.
(A) Give scientific reasons (any two): [4]
i. Tungsten metal is used to make solenoid type coil in an electric bulb.
ii. Simple microscope is used for watch repairs.
iii. Metallic character goes on decreasing while going from left to right in a period.
(B) Answer any three of the following questions: [6]
i. Write the IUPAC names of the following structural formulae:

ii. An iron ball of mass 5 kg is released from a height of 125 m and falls freely to the ground. Assuming that the value of g is 10 m/s², calculate time taken by the ball to reach the ground.
iii. What is meant by artificial satellite? Name the first satellite launched by Russia.
iv. Draw the image formed by convex lens, if object is placed at 2F₁.
v. Why does the apparent position of stars keep changing a bit?
Answer:
(A) 1. i a. Electric bulb works on the principle of heating effect electric of current.
b. The solenoid type coil of bulb has high resistivity and very high melting point.
c. When current is passed through the bulb, solenoid type coil of bulb gets heated to high temperature (upto 3400 °C) and starts glowing.
Hence, tungsten metal is used to make a solenoid type coil in an electric bulb.

ii. a. A convex lens acts as a simple microscope (magnifying glass).
b. When an object is placed within the focal length of convex lens, one gets a magnified and erect image of the object.
c. The watch repairer can see the minute parts of the watch more clearly with the help of convex lens than the naked eye, without any strain on the eye.
d. A magnification of about 20 times is obtained by simple microscope.
Hence, simple microscope is used for watch repairs.

SMART TIP
Although compound microscope gives the magnification of almost 40 to 1000 times, it will give an over-enlarged image of tiny parts of watch. Hence, it cannot be used for watch repairs.

iii. a. Metallic character is the tendency of an atom to lose the valence electrons.
b. While going from left to right in a period, electrons are added to the same outermost shell. At the same time, protons get added in the nucleus increasing the nuclear charge.
c. Therefore, the valence electrons experience greater pull from the nucleus due to increased effective nuclear charge. As a result, the tendency of the atom to lose these electrons decreases.
Hence, metallic character goes on decreasing while going from left to right in a period.

(B) i. a. Propan-2-ol
b. 2-Chloropentane

ii. Solution:
Given: Mass (m) = 5 kg, distance travelled by the ball (s) = 125 m, initial velocity of the ball (u) = 0, acceleration a = g = 10 m/s².
To find: Time taken to reach the ground (t)

Ans: The ball takes 5 seconds to reach the ground.

iii. a. If a manmade object revolves around the earth or any other planet in a fixed orbit it is called an artificial satellite.
b. The first satellite launched by Russia is Sputnik.

iv. Ray diagram:

v. a. Stars are point sources of light as they are very far away from us.
b. The apparent position of star is slightly higher than its actual position due to refraction of starlight from the atmosphere. The starlight travels from rarer medium to denser medium and continuously bends towards the normal.
c. Due to the motion of atmospheric air and change in density and temperature, the atmosphere is not steady. As a result, refractive index of air in given region, changes continuously and randomly.
d. Hence, the apparent position of star is not stationary but changes slightly.

Question 3.
Answer any five of the following questions: [15]
i. Identify the process given below and accordingly draw neat labelled diagram:
A molten mixture of alumina (melting point > 2000°C) is done in a steel tank. The tank has a graphite lining on the inner side. The lining does the work of cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na₃AlF₆) and fluorspar (CaF₂) are added in the mixture to lower its melting point upto 1000°C.
ii. With reference to the given diagram answer the following questions:

(a) Give type of chemical reaction.
(b) Give the names of reactants and products.
(c) Write down the balanced chemical equation.
iii. What is Electrical Power? Derive the unit of electric power from the given equations:

iv. Explain the term anodization with example. Give one use of it.
v. State Kepler’s three laws of motion.
vi. The electronic configuration of an element X is 2, 8, 8, 2.
(a) What is the atomic number of the element X?
(b) To which group does this element belong?
(c) In which period does this element lie?
vii. What is the contribution of India in space technology?
viii. Observe the given diagram and answer the following questions:

(a) What is refraction of light?
(b) Name the emergent ray.
(c) Which two angles are equal?
Answer:
i. a. The process is ’electrolytic reduction of alumina’.
b. Diagram:

ii. a. The reaction type: Decomposition reaction
b. Reactant: Calcium carbonate
Products: Calcium oxide, carbon dioxide
c.

iii. If charge Q flows through the resistor, then the electrical power ‘P’ is given by

OR
Electrical power refers to the rate at which electrical energy is transferred or consumed in an electrical circuit.

iv. a. The process of coating metals such as aluminium and copper with a thin and strong layer of their oxides by electrolysis is called anodizing process. In this process, copper or aluminium article is used as anode.
b. Example: When aluminium is anodized, the thin layer of aluminium oxide is formed which restricts the contact of aluminium metal with oxygen and water. This prevents further oxidation of aluminium. This protection can be further enhanced by making the oxide layer thicker during anodization process.
c. Use: It helps to prevent corrosion of metal.

v. The three laws given by Kepler are:
a. Kepler’s first law: The orbit of a planet is an ellipse with the sun at one of the foci.
b. Kepler’s second law: The line joining the planet and the sun sweeps equal areas in equal intervals of time.
c. Kepler’s third law: The square of orbital period of revolution of a planet around the Sun is directly proportional to the cube of the mean distance of the planet from the Sun.

vi. a. The atomic number of the element is 20.
b. The element belongs to group 2.
c. The element belongs to period 4.

vii. The notable contribution of India in space technology is as follows:
a. Aryabhatta: India’s first satellite, Aryabhatta, was launched by the Soviet Union in 1975. This marked India’s entry into the field of space technology.
b. SLV Satellite Series: ISRO developed its own Satellite Launch Vehicle (SLV) and successfully launched various satellites using launch vehicles.
c. INSAT Series: The Indian National Satellite System (INSAT) is a series of multipurpose geostationary satellites that have provided communication, broadcasting, and meteorological services to India.
d. IRS (Indian Remote Sensing) Satellites: India has launched a series of IRS satellites for earth observation, helping in agriculture, forestry, land use, and disaster management.
e. IRNSS (Indian Regional Navigation Satellite System): It is an independent regional navigation satellite system developed by the Indian Space Research Organisation (ISRO) to provide accurate position information services to users in India and the surrounding region.
f. GSAT Series: ISRO has launched numerous GSAT (Geo-Stationary Satellite) communication satellites to enhance telecommunications and internet connectivity across India.
g. Chandrayaan-1: In 2008, India’s first lunar mission, Chandrayaan-1, discovered water molecules on the moon’s surface and contributed to our understanding of the moon’s geology.
h. Mangalyaan (Mars Orbiter Mission): In 2013, India became the fourth country in the world to reach Mars orbit. The Mars Orbiter Mission, also known as Mangalyaan, was a significant achievement in obtaining information about surface and atmosphere of Mars.
i. Astrosat: Launched in 2015, Astrosat is India’s first dedicated multi-wavelength space observatory, contributing to the study of celestial sources.

viii. a. Light changes its direction when passing from one transparent medium to another transparent medium. This is called the refraction of light.
b. Emergent ray is MD
c. ∠i = ∠e

SMART TIP
Note that according to the geometry of figure, ∠r = ∠i₁. But since the focus of the experiment is to verify that emergent ray is parallel to incident ray, ∠i = ∠e is mentioned as the answer.

Question 4.
Attempt any one of the following questions: [5]
i. Observe the given diagram and answer the following questions:

(a) What is the name of the given apparatus?
(b) Which phenomenon is studied with the help of this apparatus?
(c) What are the final temperatures in thermometers T1 and T2?
(d) At what temperature the density of water is maximum?
(e) Give one example of the above phenomenon in nature.
ii. Observe and write the answers to the questions given below:

(a) Write the names of compound I and II.
(b) Draw electron-dot structure for I and II.
(c) Which one of the above structures is saturated compound and unsaturated compound?
Answer:
i. a. Hope’s apparatus.
b. Anomalous behaviour of water.
c. The final temperatures in thermometers T₁ and T₂ are 0 °C.
d. At 4 °C.
e. Due to anomalous behaviour of water aquatic life in regions of cold climate is preserved.

ii. a. The name of compound (I) is ethane.
The name of compound (II) is ethene.

c. Compound (I) is saturated compound.
Compound (II) is unsaturated compound.

SSC Maharashtra Board Science 1 Question Paper with Solutions