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