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