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