SSLC Science and Technology NIOS II Welcome to your SSLC Science and Technology NIOS II Total Questions: 50 Name Mobile No: 1. Electrovalent bond is another name for: Metallic bond Covalent bond Hydrogen bond Ionic bond None Hint 2. A molecule is formed when atoms are joined by: Physical force Heat Pressure Chemical bond None Hint 3. Which of the following has ionic bonding? NaCl CO₂ H₂O CH₄ None Hint 4. Atomic size decreases across a period because: Mass decreases Electrons decrease Shells increase Nuclear charge increases None Hint 5. Covalent compounds generally: Are metals Conduct electricity Are hard solids Do not conduct electricity None Hint 6. Atoms combine to achieve: Higher mass Lower energy and stability More neutrons Instability None Hint 7. Chemical bonding helps atoms to: Gain neutrons Become unstable Achieve noble gas configuration Lose mass None Hint 8. Elements with similar properties are placed in the same: Group Row Block Period None Hint 9. Ionic compounds generally have: Low boiling point Soft structure Low melting point High melting point None Hint 10. The modern periodic table is based on: Atomic mass Atomic number Density Valency None Hint 11. The most reactive non-metal is: Nitrogen Chlorine Fluorine Oxygen None Hint 12. Mendeleev arranged elements in order of increasing: Density Valency Atomic mass Atomic number None Hint 13. Elements in the same group have the same: Density Number of shells Valence electrons Atomic mass None Hint 14. The reactivity of metals increases down the group because: Nuclear charge decreases Mass decreases Atomic size decreases Atomic size increases None Hint 15. Metallic character generally: Remains constant Increases across a period Decreases across a period Decreases down a group None Hint 16. Ionic compounds conduct electricity in: Gas state Molten or aqueous state Dry state Solid state only None Hint 17. The bond in methane (CH₄) is: Ionic Covalent Metallic Hydrogen None Hint 18. Non-metals usually form bonds by: Sharing or gaining electrons Losing protons Losing neutrons Losing electrons None Hint 19. Which bond is present in nitrogen molecule (N₂)? Double covalent Ionic Triple covalent Single covalent None Hint 20. Transition elements are found in: s-block f-block p-block d-block None Hint 21. The smallest atom in the periodic table is: Hydrogen Fluorine Oxygen Helium None Hint 22. Atomic number represents the number of: Electrons only Protons Nucleons Neutrons None Hint 23. Which group contains alkaline earth metals? Group 17 Group 2 Group 1 Group 16 None Hint 24. Hydrogen bond is a type of: Metallic bond Weak intermolecular force Strong bond Ionic bond None Hint 25. The most reactive metals are found in: Group 1 Group 2 Group 18 Group 17 None Hint 26. Which bond is present in oxygen molecule (O₂)? Triple covalent Double covalent Single covalent Ionic None Hint 27. Non-metallic character generally: Increases across a period Decreases across a period Decreases down a group Remains constant None Hint 28. The valency of oxygen is: 3 2 1 4 None Hint 29. Covalent bond is formed by: Gain of neutrons Loss of protons Sharing of electrons Transfer of electrons None Hint 30. Valency of Group 1 elements is: 2 0 1 3 None Hint 31. The outermost shell electrons are called: Free electrons Core electrons Inner electrons Valence electrons None Hint 32. The element with atomic number 11 belongs to: Group 1 Group 2 Group 17 Group 18 None Hint 33. Noble gases are placed in: Group 18 Group 17 Group 1 Group 14 None Hint 34. Periodic classification helps in: Predicting properties of elements Destroying elements Increasing mass Creating atoms None Hint 35. Noble gases are chemically: Radioactive Inert Metallic Very reactive None Hint 36. Sodium chloride (NaCl) is an example of: Covalent compound Metallic compound Ionic compound Organic compound None Hint 37. A horizontal row in the periodic table is called a: Group Family Period Block None Hint 38. Metals form bonds by: Losing electrons Gaining electrons Losing neutrons Sharing electrons None Hint 39. Chemical bond is formed due to: Repulsion between atoms Heat energy Nuclear reaction Attraction between atoms None Hint 40. Ionic bond is formed by: Transfer of electrons Gain of protons Sharing of electrons Loss of neutrons None Hint 41. The bond formed between two non-metals is usually: Electrovalent Covalent Metallic Ionic None Hint 42. Water (H₂O) is formed by: Metallic bond Ionic bond Covalent bond Hydrogen bond only None Hint 43. The force that holds atoms together in a molecule is: Chemical bond Magnetic force Friction Gravitational force None Hint 44. Who proposed the modern periodic law? Mendeleev Moseley Dalton Bohr None Hint 45. Which compound has covalent bonding? NaCl KCl CaO CO₂ None Hint 46. Metallic bonding is due to: Transfer of protons Sharing of protons Transfer of neutrons Sea of free electrons None Hint 47. Which of the following is a metalloid? Chlorine Silicon Sodium Oxygen None Hint 48. A vertical column in the periodic table is called a: Block Series Period Group None Hint 49. Halogens belong to: Group 18 Group 17 Group 16 Group 1 None Hint 50. Elements in the same period have the same: Chemical properties Valency Atomic mass Number of shells None Hint Time's up Share: admin Previous post SSLC Science and Technology NIOS I February 5, 2026 Next post SSLC Science and Technology NIOS III February 5, 2026
