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