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