Every Book Back multiple-choice question from Geoinformatics (12th Standard Geography, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Which one is wrongly matched?
- A. GPS - United States
- B. GLONASS - Russia
- C. GALILEO - JapanCorrect
- D. BEODOU - China
Explanation. GALILEO is Europe's own global navigation satellite system, run by the European Union. Japan's system is QZSS. GPS (United States), GLONASS (Russia) and BeiDou (China) are correctly matched.
Q2
GPS uses a constellation of
- A. 28 satellites
- B. 30 satellites
- C. 40 satellites
- D. 24 satellitesCorrect
Explanation. GPS, the first GNSS system, was launched in the late 1970s by the United States Department of Defence. It uses a constellation of 24 satellites and provides global coverage.
Q3
IRNSS provides location information service to users in India and the region extending from the Indian boundary for up to
- A. 2300 km
- B. 2000 km
- C. 1000 km
- D. 1,500 kmCorrect
Explanation. IRNSS, developed by ISRO, serves users in India and the region extending up to 1,500 km from the Indian boundary. This is its primary service area.
Q4
Match column A with column B and answer using the codes given.
Column A: a) First Generation, b) Second Generation, c) Third Generation, d) Fourth Generation, e) Fifth Generation
Column B: i) Vacuum Tubes, ii) Transistors, iii) Integrated Circuits, iv) Microprocessors, v) Artificial Intelligence
Codes give the matches for a, b, c, d, e in order.
- A. i, ii, iii, iv, vCorrect
- B. ii, i, iii, v, iv
- C. iv, iii, v, ii, i
- D. iii, ii, i, iv, v
Explanation. The book lists 1940-1956 vacuum tubes, 1956-1963 transistors, 1964-1971 integrated circuits, 1972-2010 microprocessors and from 2010 artificial intelligence, so the pairs run in order: i, ii, iii, iv, v.
Q5
Which of the following is not the remote sensing techniques used in the field of geology?
- A. Lithological mapping
- B. Structural mapping
- C. wildlife explorationCorrect
- D. Hydrocarbon exploration
Explanation. Remote sensing in geology is used for lithological, structural, geomorphological and sedimentation mapping, mineral and hydrocarbon exploration and geo-hazard mapping. Wildlife exploration is not in that list.
Q6
Which of the following is not a sun synchronous satellite?
- A. NOAA SEASAT
- B. TIROS
- C. SKYLAB
- D. METEOSATCorrect
Explanation. METEOSAT is named in the book as a geostationary satellite used for communication and meteorology. NOAA, SEASAT, TIROS and SKYLAB are listed among the polar orbiting or sun-synchronous satellites.
Q7
Which of the following is the fastest computer in the world?
- A. Sunway TaihuLight
- B. SummitCorrect
- C. Pratyush
- D. Param 10000
Explanation. The Fact File calls IBM's Summit the new victor in the battle for the world's fastest supercomputer, with 200 petaflops of performance, a significant gain on Sunway TaihuLight.
Q8
GNSS satellites' orbit is situated about ________ km above the earth's surface.
- A. 15,000 km
- B. 20,000 kmCorrect
- C. 10,000 km
- D. 22,000 km
Explanation. The English lesson states that GNSS satellites orbit about 20,000 km above the earth's surface and move very fast, several kilometres per second.
Q9
Which of the following is a geosynchronous satellite?
- A. INTELSATCorrect
- B. Corona
- C. MIDAS
- D. SAMOS
Explanation. INTELSAT is listed with GOES, METEOSAT and INSAT as a geostationary satellite completing one revolution in 24 hours. Corona, MIDAS and SAMOS were early U.S. spy satellites.
About these Geoinformatics questions
These are the Book Back multiple-choice questions for Geoinformatics from the Tamil Nadu State Board (Samacheer Kalvi) 12th Standard Geography syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Geoinformatics?
This chapter has 9 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 12th Standard Geography MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Geoinformatics book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
