1. Select the correct association______: Oxidation-loss of an electron
2. Radioactive isotope of Uranium used in nuclear bomb is______: 92U^233
3. Human population growth is greatest in developing countries because______: The birth rate is high in developing countries
4. Which woody raw material is used for the manufacture of paper pulp?? Poplar
5. Rectified spirit contains alcohol about______: 70%
6. Which of the following elements is not present abundantly in earth’s crust? Carbon
7. The famous book “Al-Qanoon” was written by the Muslim scientist______: Abu Ali Sina
8. Basic metals can be converted into gold by______: Artificial nuclear radioactivity
9. A light year is a unit of______: Length
10. One of the main functions of the earth’s ozone layer is to______: Prevent global warming, Filter out ultraviolet rays, Absorb pollution
11. The alloy which consists of copper and tin is______: Bronze
12. The device used to measure radioactivity is______: Geiger Counter
13. The organ in the human body which is responsible for the digestion of protein only is______: Stomach
14. The instrument used to measure very high temperature is______: Pyrometer
15. The scientist who designed the first internal combustion engine used to burn low grade fuel is______: Jean J. Lenoir
16. The scientist who asserted the earth to be a huge magnet was______: William Gilbert
17. The metal known as quick silver is______: Mercury
18. The device which converts the chemical energy into electrical energy is______: Battery
19. The first person to orbit the earth in space is______: Yuri Gagarin
20. The scientist who discovered water was______: Henry Cavendish
21. The variation in the blood flow can be heard with an instrument called______: Stethoscope
22. There is a place in the retina where the light sensitive cells are interrupted by the presence of the optic nerve head. It is known as______: Blind spot/Optic disc
23. The study of human population is called______: Demography
24. Human beings belong to species called______: Sapiens
25. Defect of eye due to which nearly located objects are not clearly visible is called______: Hyperopia
26. About ______ of the human body consists of water: 65-75%
27. All of the oxygen that you breathe has been produced by the splitting of water during______: Photosynthesis
28. The important ore of Chromium is______: Chromite
29. ______ acid was discovered by Jabir Bin Hayyan: Sulphuric
30. The measurement of rainfall is made by an instrument known as______: Rain gauge