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