Some information Gk questions

Some information Gk questions 🤔 
1. Which of the following elements has the heaviest stable isotope? - lead 
2. Where is Ling wave detector located ? - Washington and Louisiana
3. What is COBOL ? - computer language
4. Who was the first person to propose the concept of heliocentism? - Copernicus
5. Which light has the higher energy than blue? - violent light
6. Which is the largest external organ of the body? - skin 
7. In Mahabharat which Indian city is believed to have been founded by Karn the eldest son of Kunti? - Karnal 
8. Gandhi Irwin pact was signed in which year ? - 1931
9. Which English governor initiated the introduction of English language in India? - lord Bentinck
10. Which river has the largest basin in the world ? - Amazon 
11. India's first economic survey was released in which year? - 1957 - 58
12. Liquidity preference theory was developed by ? - JM Keynes 
13. Who built the temple at Halebid and Belur ? - hoysalas
14. What is the difference between GDP and GNP ? - net income from abroad
15. Who is the author of the book ' an Era of darkness the British Empire in India' ? - Dr. Shashi Tharoor
16. At the what age to the judges of high court retire? - sixty two year
17. In which year was the international cricket council formed ? - 1909
18. In which year​ was the project tiger launched​? - 1973
19. Which body is responsible for conducting the elections in Panchayat and municipalities ? - state elections commission
20. Mughal painting reached its highest level of progress during the reign of ? - Jahangir