Today’s lessons: Kuṟṟiyalukaram and Kuṟṟiyalikaram; India’s location and IST; ratio and proportion. Unique headline questions: exactly 15 — 8 General Tamil (T01–T08), 5 General Studies (G09–G13), 2 Aptitude (A14–A15). The English versions are translations of the same questions, not extra questions.
Answer every question before reading the key. The eight General Tamil questions retain their original Tamil wording and answer options; the English key explains the terms.
Part 1 — English companion: same 15 questions
T01. குற்றியலுகரம் எத்தனை வகைப்படும்? [Original model question]
A) 4 B) 5 C) 6 D) 7
T02. “பாகு” எந்த வகைக் குற்றியலுகரம்? [Original model question]
A) நெடில்தொடர் B) ஆய்தத்தொடர் C) உயிர்த்தொடர் D) மென்தொடர்
T03. “எஃகு” எந்த வகைக் குற்றியலுகரம்? [Original model question]
A) வன்தொடர் B) ஆய்தத்தொடர் C) இடைத்தொடர் D) உயிர்த்தொடர்
T04. “அரசு” எந்த வகைக் குற்றியலுகரம்? [Original model question]
A) நெடில்தொடர் B) இடைத்தொடர் C) உயிர்த்தொடர் D) ஆய்தத்தொடர்
T05. “பத்து” எந்த வகைக் குற்றியலுகரம்? [Original model question]
A) மென்தொடர் B) வன்தொடர் C) உயிர்த்தொடர் D) இடைத்தொடர்
T06. “பந்து” எந்த வகைக் குற்றியலுகரம்? [Original model question]
A) வன்தொடர் B) நெடில்தொடர் C) ஆய்தத்தொடர் D) மென்தொடர்
T07. “மார்பு” எந்த வகைக் குற்றியலுகரம்? [Original model question]
A) இடைத்தொடர் B) உயிர்த்தொடர் C) வன்தொடர் D) நெடில்தொடர்
T08. குற்றியலிகரம் எத்தனை மாத்திரை அளவில் ஒலிக்கும்? [Original model question]
A) 1 மாத்திரை B) 2 மாத்திரை C) ½ மாத்திரை D) 1½ மாத்திரை
G09. Which meridian is used for Indian Standard Time? [Original model question]
A) 68°7′ E B) 82°30′ E C) 97°25′ E D) 23½° N
G10. Through how many Indian states does the Tropic of Cancer pass? [Original model question]
A) 6 B) 7 C) 8 D) 9
G11. What is the southernmost point of India, including its islands? [Original model question]
A) Kanniyakumari B) Kavaratti C) Indira Point D) Chennai
G12. What is India’s approximate north–south extent? [Original model question]
A) 2,933 km B) 3,214 km C) 1,520 km D) 7,516 km
G13. What is India’s revised total coastline length announced in 2025? [Original model question]
A) 7,516.6 km B) 11,098.81 km C) 15,200 km D) 3,214 km
A14. The length-to-breadth ratio of a rectangle is 4:7. If its breadth is 77 cm, what is its length? [TNPSC Group IV 2016 PYQ: Q193, printed p.74; final-key version match pending]
A) 22 cm B) 33 cm C) 44 cm D) 55 cm
A15. Six equally efficient taps fill a tank in 10 hours. How long will 15 such taps take? [Original model question]
A) 3 hours B) 4 hours C) 5 hours D) 6 hours
Part 2 — Answer key and explanations for all 15
T01 — C. Kuṟṟiyalukaram has six categories: long-vowel, āytham, vowel, hard-consonant, soft-consonant and medial-consonant groups.
T02 — A. பாகு (pāku) has a long vowel before its final குற்றியலுகரம்; it is நெடில்தொடர்.
T03 — B. The letter ஃ (āytham) precedes the final கு, so this is ஆய்தத்தொடர்.
T04 — C. அரசு (arasu) is classified as உயிர்த்தொடர் because the preceding ர is a vowel-consonant letter.
T05 — B. பத்து (pattu) has a hard-consonant sound before the final து: வன்தொடர்.
T06 — D. பந்து (pantu) has the nasal consonant ந் before து: மென்தொடர்.
T07 — A. மார்பு (mārpu) has the medial consonant ர் before பு: இடைத்தொடர்.
T08 — C. Kuṟṟiyalikaram is a shortened இ sound, pronounced for half a māttirai (metrical time unit).
G09 — B. IST is based on the standard meridian at 82°30′ east longitude.
G10 — C. The Tropic of Cancer crosses eight Indian states, from Gujarat to Mizoram.
G11 — C. Indira Point on Great Nicobar is India’s southernmost point; Kanniyakumari is the mainland’s southernmost point.
G12 — B. India extends approximately 3,214 km north to south, compared with 2,933 km east to west.
G13 — B. The revised official coastline length is 11,098.81 km; 7,516.6 km is the older figure.
A14 — C. Length = 77 × (4/7) = 44 cm. This question is confirmed in the 2016 Group IV paper, Q193, printed p.74; alignment with the final-key booklet version is pending.
A15 — B. Inverse proportion: taps × hours stays constant. 6 × 10 = 15 × t, so t = 60/15 = 4 hours.
Complete book-back chapter practice—additional verified questions (batch 1/6) | English
Source: Tamil Nadu Class 10 Social Science, Geography Unit 1, India – Location, Relief and Drainage, 2019 government textbook printed pp.96–97. Questions are briefly paraphrased with original exercise identifiers; these are separate from the 15 headline MCQs.
B01 | Class 10 Social Science, Geography Unit 1, Exercise I.2 (2019 edition).
Which is India’s southernmost point, including islands?
A) Kanniyakumari B) Indira Point C) Kavaratti D) Port Blair
Answer: B Indira Point is on Great Nicobar Island.
B02 | Class 10 Social Science, Geography Unit 1, Exercise I.6 (2019 edition).
What is land surrounded by the sea on three sides called?
A) Island B) Cape C) Peninsula D) Strait
Answer: C A peninsula has water on three sides.
B03 | Class 10 Social Science, Geography Unit 1, Exercise I.7 (2019 edition).
Which country is separated from India by the Palk Strait and Gulf of Mannar?
A) Maldives B) Sri Lanka C) Myanmar D) Pakistan
Answer: B These waters lie between Tamil Nadu and Sri Lanka.
B04 | Class 10 Social Science, Geography Unit 1, Exercise I.10 (2019 edition).
Between which two states is Pulicat Lake located?
A) Tamil Nadu–Andhra Pradesh B) Kerala–Karnataka C) Odisha–Andhra Pradesh D) Gujarat–Maharashtra
Answer: A Pulicat Lake lies along the Tamil Nadu–Andhra Pradesh coast.
B05 | Class 10 Social Science, Geography Unit 1, Exercise V.1 (2019 edition).
List India’s land neighbours.
Answer: Pakistan, China, Nepal, Bhutan, Bangladesh and Myanmar. Textbooks also list Afghanistan based on India’s claimed boundary in Kashmir, not under present Indian administration.
B06 | Class 10 Social Science, Geography Unit 1, Exercise V.2 (2019 edition).
Why is Indian Standard Time important?
Answer: It provides one official clock time across India despite differences in local solar time. IST is based on 82°30′ E and equals UTC+5:30.
Textbook Book-Back Progress Ledger
Class 10 Social Science – Geography Unit 1 (2019 edition): Six core exercise items completed today (I.2, I.6, I.7, I.10, V.1, V.2). Progress: 6/36 core items; 30 pending. Five activities are tracked separately: 0/5. The 36 core items comprise 10 MCQs, five individual matching pairs, six give-reasons items, four distinctions, five short answers, three paragraph answers and three map tasks. This is additional book-back batch 1/6 for the core items; activities will be handled separately.
Class 7 Tamil, Term 1, Lesson 1.5: 0 / total unknown. Source not yet verified: secondary solutions have not been checked against the complete original 2026–27 government textbook.
Class 6 Mathematics, Ratio and Proportion: 0 / total unknown. Source not yet verified: the full original book-back exercise set is not yet confirmed.
Earlier progress: Class 9 Science, Measurement (2020 edition) — 8/36 recorded on 15 October; no new items completed today. Comparison with the 2026–27 edition remains pending.
Planned Spaced Revision
Day 01 +3-day review (13 → 16 October): Tamil short vowels = 5 and long vowels = 7; review the Indian National Movement timeline; Percentage = (part ÷ whole) × 100. This is a quick recap, not an additional headline quiz. Day 04 reviews fall on 17, 19, 23 and 30 October 2026 (+1/+3/+7/+14 days). A weekly practice extension will be provided within a future 7 PM session.
