TS Class 10 Physical Science Solved Public Exam Paper 2022 -Physics & Chemistry Solutions, & Part-B

📄 Official Board Exam Solution — 2022

TS SSC Physical Science 2022 Public Exam Solved Paper

Complete Step-by-Step Official Solutions: Physics & Chemistry Sections, Ray Diagrams, Refractive Index Numericals, Organic Reactions & Part-B Objective MCQs

📌 2022 Board Examination Pattern & Weightage Summary

1. Total Weightage & Time

Total Marks: 40 Marks (Part-A: 35 Marks + Part-B: 5 Marks) | Duration: 1 Hour 30 Minutes

Part-A = 35 Marks  |  Part-B = 5 Marks (10 MCQs)

2. Physics Section Focus

Refraction of Light, Human Eye & Colourful World, Electric Current, Electromagnetism:

Physics Section = 20 Marks

3. Chemistry Section Focus

Chemical Equations, Acids & Bases, Periodic Table, Chemical Bonding & Carbon Compounds:

Chemistry Section = 20 Marks

📊 TS SSC 2022 Question Paper Key Topics Analysis

High-priority topics that appeared in the official 2022 Telangana Class 10 Public Examination:

Key Core Topics in 2022 Paper

1. Refraction & Refractive Index

Featured Question: Calculation of absolute refractive index (n = c/v) and critical angle relationship.

2. Electric Power & Parallel Circuits

Featured Question: Solved parallel resistor combination numerical & electric bulb resistance calculation.

3. Chemical Bonding & VSEPR

Featured Question: VSEPR shape and bond angle explanation for Methane (CH₄) vs Water (H₂O).

4. Organic Chemistry & IUPAC

Featured Question: Homologous series, Esterification reaction, and IUPAC nomenclature of alcohols.

Official Board Pattern Note: Part-A contains short, medium, and essay questions with internal choice in essay questions. Part-B contains 10 objective multiple choice questions carrying 0.5 marks each.

⚡ Physics Section Solved Questions (Part-A)

PHYSICS - 2 MARKS

Q1. Define Absolute Refractive Index. Calculate the refractive index of a medium if the speed of light in that medium is 2 × 10⁸ m/s.

Definition: Absolute Refractive Index (n) of a medium is the ratio of the speed of light in vacuum (c) to the speed of light in that medium (v).

Formula: n = c / v

Calculation:

Given speed of light in vacuum c = 3 × 10⁸ m/s

Speed of light in medium v = 2 × 10⁸ m/s

n = (3 × 10⁸) / (2 × 10⁸) = 3 / 2 = 1.5

✓ Final Answer: Absolute Refractive Index n = 1.5 (unitless quantity).

PHYSICS - 4 MARKS SOLVED NUMERICAL

Q2. Resistors of resistance 3 Ω and 6 Ω are connected in parallel across a 6 V battery. Calculate:
(a) Equivalent resistance of the circuit.
(b) Total current flowing through the circuit.
(c) Total power consumed by the parallel combination.

Given Data: R₁ = 3 Ω, R₂ = 6 Ω, Voltage V = 6 V

(a) Calculating Equivalent Resistance (R_eq):

1 / R_eq = 1 / R₁ + 1 / R₂ = 1 / 3 + 1 / 6 = (2 + 1) / 6 = 3 / 6 = 1 / 2

R_eq = 2 Ω

(b) Calculating Total Current (I):

I = V / R_eq = 6 V / 2 Ω = 3 A

(c) Calculating Power Consumed (P):

P = V × I = 6 V × 3 A = 18 W

✓ Final Answer:
1. Equivalent Resistance R_eq = 2 Ω.
2. Total Current I = 3 A.
3. Total Power P = 18 W.

PHYSICS - 6 MARKS ESSAY & RAY DIAGRAM

Q3. An object is placed at 2F₁ (Center of Curvature) in front of a Convex Lens. Describe the position, nature, and magnification of the image formed. Draw a neat schematic ray diagram.

Answer:

• Position of Object: At 2F₁ in front of the convex lens.
• Position of Image: Formed exactly at 2F₂ on the opposite side of the lens.
• Nature and Characteristics of Image:
  1. Nature: Real and Inverted.
  2. Size: Same size as the object.
  3. Magnification (m): m = -1 (Negative indicates inverted image).

Ray Tracing Rules Used:

1. Ray 1: Parallel to principal axis passes through focus F₂ after refraction.

2. Ray 2: Passing through optic center O goes straight undeviated.

3. Intersection Point: Both refracted rays meet precisely at 2F₂.

🧪 Chemistry Section Solved Questions (Part-A)

CHEMISTRY - 2 MARKS

Q4. Write the set of four Quantum Numbers for the valence electron of a Potassium atom (K, Z = 19).

Answer:

• Potassium (K, Z = 19): Ground state electronic configuration = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹.
• The valence electron enters the 4s orbital (4s¹).
• 4 Quantum Numbers for 4s¹ electron:
  • Principal Quantum Number (n) = 4
  • Angular Momentum Quantum Number (l) = 0 (for s-subshell)
  • Magnetic Quantum Number (m_l) = 0
  • Spin Quantum Number (m_s) = +½ (or -½)

CHEMISTRY - 4 MARKS

Q5. What is Esterification? Write the balanced chemical equation for the reaction between Ethanoic acid and Ethanol in the presence of concentrated H₂SO₄.

Answer:

• Esterification: The chemical reaction in which a carboxylic acid reacts with an alcohol in the presence of an acid catalyst to form a sweet fruity-smelling ester and water.
• Balanced Chemical Equation:
  CH₃COOH (Ethanoic acid) + C₂H₅OH (Ethanol) →conc. H₂SO₄→ CH₃COOC₂H₅ (Ethyl acetate) + H₂O
• Applications: Used in making perfumes, artificial fruity flavoring agents, and cold drinks.

CHEMISTRY - 6 MARKS ESSAY

Q6. Describe the classification of elements into s, p, d, and f blocks in the Modern Periodic Table based on electronic configuration.

Answer:

Block Name	Groups Included	Valence Configuration	Main Characteristics
s-Block	Group 1 & Group 2	ns1-2	Highly reactive alkali and alkaline earth metals.
p-Block	Groups 13 to 18	ns2 np1-6	Contains metals, non-metals, metalloids, and noble gases.
d-Block	Groups 3 to 12	(n-1)d1-10 ns1-2	Transition elements; form colored compounds and show variable valency.
f-Block	Bottom 2 rows	(n-2)f1-14 (n-1)d0-1 ns2	Inner transition elements (Lanthanoids 4f & Actinoids 5f).

🎯 PART-B Objective Bits Bank (10 MCQs - Official 2022 Paper)

BIT 1

1. Speed of light in vacuum is equal to:

• 3 × 10⁸ m/s
• 3 × 10⁵ m/s
• 2 × 10⁸ m/s
• 3 × 10¹⁰ m/s

✓ Correct Option: A (3 × 10⁸ m/s)

BIT 2

2. The focal length of a concave lens is -25 cm. Its power is:

• -4.0 D
• +4.0 D
• -2.5 D
• +0.4 D

✓ Correct Option: A (P = 100 / f = 100 / -25 = -4.0 D)

BIT 3

3. A device that converts mechanical energy into electrical energy is called an:

• Electric Motor
• Electric Generator
• Voltmeter
• Ammeter

✓ Correct Option: B (Electric Generator)

BIT 4

4. What is the SI unit of Magnetic Flux (Φ)?

• Tesla
• Weber
• Ohm
• Gauss

✓ Correct Option: B (Weber - Wb)

BIT 5

5. Which halogen is the most electronegative element in the periodic table?

• Chlorine
• Fluorine
• Bromine
• Iodine

✓ Correct Option: B (Fluorine - F)

BIT 6

6. What is the shape of a d-orbital?

• Spherical
• Dumbbell
• Double dumbbell
• Complex

✓ Correct Option: C (Double dumbbell)

BIT 7

7. Chemical formula of Bleaching Powder is:

• NaHCO₃
• Na₂CO₃ · 10H₂O
• CaOCl₂
• CaSO₄ · ½H₂O

✓ Correct Option: C (CaOCl₂ - Calcium Oxychloride)

BIT 8

8. The functional group present in an Aldehyde is:

• -OH
• -CHO
• >C=O
• -COOH

✓ Correct Option: B (-CHO)

BIT 9

9. Kirchhoff's Loop Law (∑V = 0) is based on the Law of Conservation of:

• Charge
• Energy
• Mass
• Momentum

✓ Correct Option: B (Conservation of Energy)

BIT 10

10. General formula of Alkane hydrocarbons is:

• C_nH_2n+2
• C_nH_2n
• C_nH_2n-2
• C_nH_2n+1

✓ Correct Option: A (C_nH_2n+2)