AP 10th Class Physical Science Question Paper June 2023 with Solutions

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AP SSC Physical Science Question Paper June 2023 with Solutions

Time: 2 Hours
Maximum Marks: 50

Instructions:

• The question paper consists of 4 sections and 17 questions.
• Internal choice is available only for Q.No.12 in section III and for all the questions in section IV.
• In 2 hours, 15 minutes are allotted to read the question paper.
• All answers shall be written in the answer booklet only.
• Answers shall be written neatly and legibly.

Section-I
(8 × 1 = 8 Marks)

Note:

• Answer ALL the questions.
• Each question carries 1 mark.

Question 1.
Convert 30°C into Kelvin scale.
Answer:
30° + 273 = 303K

Question 2.
Write one application of specific heat.
Answer:
Watermelon brought out from the refrigerator retains its coolness for a longer time.

Question 3.
Draw the shape of any lens you know.
Answer:

Question 4.
Assertion (A): N-Shell has more energy when compared to K-Shell.
Reason (R): N-Shell is far from the nucleus.
Choose the correct one from the following:
(P) Both A and R are true and R is the correct explanation of A.
(Q) Both A and,R are true and R is not the correct explanation of A.
(R) A is true and R is false.
(S) Both A and R are false.
Answer:
(P) Both A and R are true and R is the correct explanation of A.

Question 5.
Fill out the following table and write answers in your answer booklet.

Element	Group Number	Valency Electrons
Hydrogen		1
Beryllium	2

Answer:

Element	Group Number	Valency Electrons
Hydrogen	1	1
Beryllium	2	2

Question 6.
Write the name of a compound having a -COOH functional group.
Answer:
Acetic Acid (or) CH₃COOH

Question 7.
What happens to the burning candle in the given experiment?

Answer:
It puts off with pop sound.

Question 8.
AC current is more convenient for transmission than DC current. Why?
Answer:
Because AC current can be produced easily.

Section-II
(3 × 2 = 6 Marks)

Note:

• Answer ALL the questions.
• Each question carries 2 marks.

Question 9.
Write any two questions to understand the evaporation process.
Answer:

• What is evaporation?
• What are the factors affecting evaporation?

Question 10.
Write any two questions to understand the hybridization of atomic orbitals.
Answer:

• What is the hybridization of atomic orbitals?
• How many types of hybridizations of atomic orbitals are there?

Question 11.
What do you mean by electric shock? Explain how it takes place.
Answer:

• The electric shock is a combined effect of potential difference, electric current, and resistance of the human body.
• When a body touches a live wire of 240 V, the amount of current flowing through the body is 0.0024A which disturbs the functioning of inside organisms. This is called electric shock.
• If the current flow continues further, it damages tissues, which lowers the resistance.
• Because of low resistance more current flows through the body which leads to death sometimes.

Section-III
(3 × 4 = 12 Marks)

Note:

• Answer ALL the questions.
• Each question carries 4 marks.

Question 12.
Draw any one of the following diagrams:
(A) Draw the ray diagram of the image formed when an object is placed in front of a convex lens in between 2F₂ and F₂.
(B) Draw the diagram that shows the increasing value of (n + l).
Answer:

Question 13.
Observe the following table and write the correct answers for blanks in your answer booklet.

Sub-Shells	Number of Orbitals	Maximum Number of Electrons
s	–	2
–	3	6
d	5	–
f	–	14

Answer:

Sub-Shells	Number of Orbitals	Maximum Number of Electrons
s	1	2
p	3	6
d	5	10
f	7	14

Question 14.
How do you appreciate the role of carbon in daily life?
Answer:

• All molecules that make life possible – Carbohydrates, proteins, lipids, hormones, and vitamins contain carbon.
• The chemical reactions that take place in living systems are of carbon compounds.
• Food that we get from nature, various medicines, cotton, silk, and fuels are carbon compounds.
• Synthetic fabrics, plastics, and synthetic rubber are also compounds of carbon.
• So I appreciate the role of carbon in daily life.

Section-IV
(3 × 8 = 24 Marks)

Note:

• Answer ALL the questions.
• Each question carries 8 marks.
• Each question has an internal choice.

Question 15.
(A) A person can see near objects clearly and cannot see far objects. What eye defect does he have? How to correct it? Explain.
(OH)
(B) Explain the process of working of Electric motor.
Answer:
(A) (i) Some people cannot see the object at long distances but can see near objects. This type of eye defect in vision is called Myopia or Short sightedness.
(ii) In people suffering from myopia, the rays coming from distant objects after refraction through the eye lens form an image before the retina.
(iii) By using the biconcave lens, we can rectify myopia.
(iv)

OR
(B) Electric motor converts electrical energy into mechanical energy.
Working:

• Consider a rectangular coil ABCD (Armature) kept in a uniform magnetic field.
• Allow the current to flow through the rectangular coil, the angle made by AB and CD with magnetic field always right angle.
• The force on AB is equal and opposite to the force on CD due to the external magnetic field. The rectangular coil comes into rotation in a clockwise direction.
• After half rotation the sides of the coil experience forces that are in the opposite direction to the previous case.
• The brushes are connected to the battery and the ends of the coil are connected to slip rings.
• For every half rotation, the brushes come into contact with other slip rings in such a way that the direction of current through the coil is reversed.
• Thus the direction of rotation of the coil remains the same. In this way, an electric motor works.

Question 16.
(A) How do the following properties change in a group and period in the modern periodic table?
(a) Atomic Radius
(b) Ionization Energy
(c) Electron Affinity
(d) Electro negativity
(OR)
(B) Define the following:
(1) Roasting
(2) Calcination
(3) Smelting
(4) Gangue
Answer:
(A) (a) Atomic radius increases in groups from top to bottom. Atomic radius decreases in periods from left to right.
(b) Ionization energy decreases in groups from top to bottom. Ionization energy increases in periods from left to right.
(c) Electron affinity decreases in groups from top to bottom. Electron affinity increases in periods from left to right.
(d) Electronegativity decreases in groups from top to bottom. Electronegativity increases in periods from left to right.
(OR)

Periodic Property	Trend in
	Groups	Periods
Atomic Radius	Increasing	Decreasing
Ionisation Energy	Decreasing	Increasing
Electron Affinity	Decreasing	Increasing
Electronegativity	Decreasing	Increasing

(OR)
(B) 1. Roasting: Roasting is a process of heating the ore strongly in a free supply of air (or) oxygen.
2. Calcination: Calcination is a process of heating the ore strongly in the absence of air (or) oxygen.
3. Smelting: Smelting is a pyrochemical process, in which the ore is mixed with flux and fuel and strongly heated.
4. Gangue: The impurity present in the ore is called Gangue.

Question 17.
(A) How do you experimentally prove that Sin i/Sin r is a constant?
(OR)
(B) Explain an experiment to prove that aqueous solutions of acids conduct electricity.
Answer:
(A) Aim: To prove \(\frac{\sin i}{\sin r}\) is constant.
Materials Required: A plank, white chart, protractor scale, small black painted plank, pencil, LASER light, semi-circular glass disc.
Procedure:

• Take a wooden plank covered with white paper and draw two perpendicular lines MM and NN intersecting at ‘O’.
• Take the protractor and place it along such that its center coincides with ‘O’ and mark the angle from 0° to 90° both sides of NN.
• Repeat the same on the other side.
• Place a semi-circular glass disc as shown in the figure.
• Send the LASER light along a line that makes an angle of 15°. Measure its corresponding refractive angle.
• Repeat the experiment for various incident angles and tabulate.
  
• Evaluate \(\frac{\sin i}{\sin r}\) from the table. Finally, you will get the ratio of \(\frac{\sin i}{\sin r}\) is constant.
• Result: Hence \(\frac{\sin i}{\sin r}\) is constant.

(OR)
(B) Aim: To prove that an aqueous solution of acids conducts electricity.
Apparatus: Beaker, Graphite rods, bulb, wire, dilute HCl solution.

Procedure:

• Arrange the apparatus as shown in the figure.
• Pour some solution of dil. HCl and switch on the current. We will notice that the bulb will glow.
• Glowing of the bulb indicates that there is a flow of electric current through the solution.
• Acidic solutions have ions and the movement of these ions in the solution helps for the flow of electric current through the solution.

Result: Hence, it is proved that the aqueous solution of acids conducts electricity.