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)? Triple covalent Double covalent Single covalent Ionic None Hint 2. Metallic character generally: Remains constant Increases across a period Decreases down a group Decreases across a period None Hint 3. Noble gases are chemically: Very reactive Metallic Radioactive Inert None Hint 4. Which of the following has ionic bonding? CO₂ H₂O CH₄ NaCl None Hint 5. Electrovalent bond is another name for: Metallic bond Hydrogen bond Covalent bond Ionic bond None Hint 6. Chemical bond is formed due to: Nuclear reaction Attraction between atoms Repulsion between atoms Heat energy None Hint 7. Transition elements are found in: f-block s-block d-block p-block None Hint 8. The outermost shell electrons are called: Inner electrons Free electrons Core electrons Valence electrons None Hint 9. The smallest atom in the periodic table is: Fluorine Helium Oxygen Hydrogen None Hint 10. Ionic compounds generally have: Low melting point Soft structure Low boiling point High melting point None Hint 11. The bond in methane (CH₄) is: Covalent Metallic Hydrogen Ionic None Hint 12. Metals form bonds by: Losing neutrons Losing electrons Gaining electrons Sharing electrons None Hint 13. The element with atomic number 11 belongs to: Group 2 Group 17 Group 18 Group 1 None Hint 14. The force that holds atoms together in a molecule is: Chemical bond Friction Magnetic force Gravitational force None Hint 15. The valency of oxygen is: 4 1 2 3 None Hint 16. Ionic bond is formed by: Gain of protons Transfer of electrons Loss of neutrons Sharing of electrons None Hint 17. Noble gases are placed in: Group 1 Group 17 Group 18 Group 14 None Hint 18. Elements with similar properties are placed in the same: Group Row Block Period None Hint 19. Elements in the same period have the same: Atomic mass Number of shells Chemical properties Valency None Hint 20. Atomic size decreases across a period because: Shells increase Nuclear charge increases Mass decreases Electrons decrease None Hint 21. Halogens belong to: Group 16 Group 17 Group 18 Group 1 None Hint 22. The most reactive metals are found in: Group 18 Group 1 Group 17 Group 2 None Hint 23. The bond formed between two non-metals is usually: Metallic Ionic Covalent Electrovalent None Hint 24. Which bond is present in oxygen molecule (O₂)? Single covalent Ionic Triple covalent Double covalent None Hint 25. Non-metallic character generally: Remains constant Increases across a period Decreases across a period Decreases down a group None Hint 26. Metallic bonding is due to: Sea of free electrons Transfer of neutrons Sharing of protons Transfer of protons None Hint 27. The modern periodic table is based on: Valency Atomic mass Atomic number Density None Hint 28. Elements in the same group have the same: Number of shells Atomic mass Valence electrons Density None Hint 29. A vertical column in the periodic table is called a: Block Period Series Group None Hint 30. Mendeleev arranged elements in order of increasing: Atomic number Valency Atomic mass Density None Hint 31. Covalent bond is formed by: Gain of neutrons Loss of protons Transfer of electrons Sharing of electrons None Hint 32. Which group contains alkaline earth metals? Group 17 Group 16 Group 1 Group 2 None Hint 33. Sodium chloride (NaCl) is an example of: Organic compound Ionic compound Metallic compound Covalent compound None Hint 34. A molecule is formed when atoms are joined by: Pressure Chemical bond Heat Physical force None Hint 35. A horizontal row in the periodic table is called a: Period Group Family Block None Hint 36. Valency of Group 1 elements is: 2 1 3 0 None Hint 37. Non-metals usually form bonds by: Losing neutrons Losing electrons Sharing or gaining electrons Losing protons None Hint 38. The reactivity of metals increases down the group because: Atomic size decreases Atomic size increases Mass decreases Nuclear charge decreases None Hint 39. Which compound has covalent bonding? NaCl KCl CaO CO₂ None Hint 40. Atomic number represents the number of: Electrons only Neutrons Nucleons Protons None Hint 41. Ionic compounds conduct electricity in: Molten or aqueous state Dry state Gas state Solid state only None Hint 42. Atoms combine to achieve: Higher mass Lower energy and stability More neutrons Instability None Hint 43. The most reactive non-metal is: Nitrogen Oxygen Fluorine Chlorine None Hint 44. Chemical bonding helps atoms to: Gain neutrons Lose mass Achieve noble gas configuration Become unstable None Hint 45. Covalent compounds generally: Are metals Are hard solids Do not conduct electricity Conduct electricity None Hint 46. Hydrogen bond is a type of: Metallic bond Ionic bond Weak intermolecular force Strong bond None Hint 47. Water (H₂O) is formed by: Metallic bond Ionic bond Hydrogen bond only Covalent bond None Hint 48. Periodic classification helps in: Predicting properties of elements Creating atoms Increasing mass Destroying elements None Hint 49. Which of the following is a metalloid? Chlorine Oxygen Sodium Silicon None Hint 50. Who proposed the modern periodic law? Dalton Moseley Bohr Mendeleev 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
