SSLC Science and Technology NIOS I Welcome to your SSLC Science and Technology NIOS I Total Questions: 50 Name Mobile No: 1. Microorganisms that cause diseases are called: Useful microbes Pathogens Decomposers Producers None Hint 2. Who proposed the nuclear model of atom? Rutherford Bohr Dalton Thomson None Hint 3. Science and technology are important because they: Reduce knowledge Improve quality of life Increase superstition Promote ignorance None Hint 4. Neutral atom means: Protons = electrons Neutrons = electrons Electrons > protons Protons > electrons None Hint 5. The atomic mass of an element depends mainly on: Neutrons Protons Electrons Protons and neutrons None Hint 6. Friction always acts: Downward Opposite to motion Vertically upward In the direction of motion None Hint 7. Rusting of iron is an example of: Reversible change Chemical change Temporary change Physical change None Hint 8. The maximum number of electrons in the second shell is: 2 8 18 4 None Hint 9. Which of the following is a physical change? Cooking of food Melting of ice Rusting of iron Burning of paper None Hint 10. Which of the following is a renewable resource? Petroleum Solar energy Coal Natural gas None Hint 11. The atomic number of an element represents the number of: Electrons only Nucleons Protons Neutrons None Hint 12. Atomic structure helps us understand: Chemical bonding Earthquakes Motion of planets Weather changes None Hint 13. Energy is defined as the ability to: Produce sound Do work Eat food Create matter None Hint 14. Which form of energy is stored in food? Heat energy Chemical energy Mechanical energy Light energy None Hint 15. Overuse of technology may lead to: Peace Resource conservation Environmental pollution Biodiversity growth None Hint 16. Which vitamin is produced in the human body in sunlight? Vitamin D Vitamin B Vitamin A Vitamin C None Hint 17. Atom is the smallest unit of: A solution A mixture A compound An element None Hint 18. Vaccination helps in: Increasing pain Curing diseases instantly Preventing diseases Spreading infection None Hint 19. The nucleus of an atom contains: Only protons Only electrons Only neutrons Protons and neutrons None Hint 20. Which element has atomic number 1? Nitrogen Oxygen Helium Hydrogen None Hint 21. Which subatomic particle has no charge? Proton Ion Electron Neutron None Hint 22. Isotopes are atoms of the same element having: Same number of neutrons Same chemical properties only Same mass number Same atomic number None Hint 23. The maximum number of electrons in the first shell is: 8 18 2 4 None Hint 24. Which technology helps in instant communication? Agriculture Biotechnology Information technology Mining None Hint 25. The force that pulls objects towards the Earth is: Muscular force Gravitational force Frictional force Magnetic force None Hint 26. Which of the following is a communicable disease? Tuberculosis Blood pressure Diabetes Cancer None Hint 27. The main function of the heart is to: Digest food Control brain Pump blood Help breathing None Hint 28. Science is mainly based on: Tradition Belief Imagination Observation and experiment None Hint 29. Which part of the plant is mainly responsible for photosynthesis? Stem Flower Leaf Root None Hint 30. Electrons revolve around the nucleus in: Straight lines Fixed circular orbits Random paths Square paths None Hint 31. Valence electrons are present in the: Innermost shell Middle shell Outermost shell Nucleus None Hint 32. Matter is anything that: Can be seen Has colour Has smell Occupies space and has mass None Hint 33. The number of neutrons in an atom is calculated by: Mass number – atomic number Atomic number – mass number Atomic number × 2 Mass number ÷ atomic number None Hint 34. The charge on an electron is: Positive Negative Variable Neutral None Hint 35. Which of the following is an isotope of hydrogen? Nitrogen Deuterium Helium Oxygen None Hint 36. The basic unit of life is: Tissue Organ Cell System None Hint 37. Which of the following is a branch of science? Engineering Architecture Physics Medicine None Hint 38. The SI unit of length is: Metre Centimetre Millimetre Kilometre None Hint 39. An ion is formed due to: Nuclear reaction Gain of protons Loss of neutrons Loss or gain of electrons None Hint 40. Which gas is essential for respiration? Carbon dioxide Hydrogen Oxygen Nitrogen None Hint 41. Which subatomic particle is responsible for electric current? Neutron Proton Nucleus Electron None Hint 42. Plants prepare their food by the process of: Transpiration Respiration Photosynthesis Digestion None Hint 43. Bohr’s model explains: Atomic structure Chemical reactions Nuclear fission Radioactivity None Hint 44. Mass number is the sum of: Electrons and neutrons Protons and neutrons Protons and electrons Only neutrons None Hint 45. Technology is best described as: Application of scientific knowledge Art Philosophy Pure science None Hint 46. A positively charged ion is called: Anion Isotope Cation Atom None Hint 47. Which particle determines the chemical properties of an atom? Proton Nucleus Neutron Electron None Hint 48. Who discovered the electron? J.J. Thomson Rutherford Bohr Dalton None Hint 49. Which instrument is used to measure temperature? Ammeter Barometer Hygrometer Thermometer None Hint 50. Which shell is closest to the nucleus? K shell L shell M shell N shell None Hint Time's up Share: admin Previous post SSLC Social Science NIOS VIII February 4, 2026 Next post SSLC Science and Technology NIOS II February 5, 2026
