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 Hydrogen bond Ionic bond Covalent bond None Hint 2. Ionic compounds generally have: Low boiling point Soft structure High melting point Low melting point None Hint 3. Which of the following has ionic bonding? CH₄ CO₂ NaCl H₂O None Hint 4. Noble gases are placed in: Group 14 Group 17 Group 18 Group 1 None Hint 5. The modern periodic table is based on: Valency Atomic mass Atomic number Density None Hint 6. The element with atomic number 11 belongs to: Group 18 Group 17 Group 2 Group 1 None Hint 7. A molecule is formed when atoms are joined by: Heat Chemical bond Physical force Pressure None Hint 8. The outermost shell electrons are called: Core electrons Inner electrons Free electrons Valence electrons None Hint 9. Who proposed the modern periodic law? Mendeleev Moseley Bohr Dalton None Hint 10. A vertical column in the periodic table is called a: Series Period Group Block None Hint 11. Which compound has covalent bonding? CO₂ CaO NaCl KCl None Hint 12. Which bond is present in oxygen molecule (O₂)? Triple covalent Ionic Single covalent Double covalent None Hint 13. Which bond is present in nitrogen molecule (N₂)? Triple covalent Ionic Single covalent Double covalent None Hint 14. Metallic bonding is due to: Sea of free electrons Sharing of protons Transfer of neutrons Transfer of protons None Hint 15. Periodic classification helps in: Increasing mass Destroying elements Predicting properties of elements Creating atoms None Hint 16. Which of the following is a metalloid? Chlorine Silicon Sodium Oxygen None Hint 17. Atomic size decreases across a period because: Electrons decrease Mass decreases Shells increase Nuclear charge increases None Hint 18. Non-metallic character generally: Decreases across a period Increases across a period Decreases down a group Remains constant None Hint 19. Ionic bond is formed by: Sharing of electrons Transfer of electrons Gain of protons Loss of neutrons None Hint 20. Chemical bond is formed due to: Nuclear reaction Attraction between atoms Heat energy Repulsion between atoms None Hint 21. Which group contains alkaline earth metals? Group 17 Group 1 Group 2 Group 16 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: Electrovalent Ionic Covalent Metallic None Hint 24. Metallic character generally: Decreases across a period Decreases down a group Increases across a period Remains constant None Hint 25. Hydrogen bond is a type of: Ionic bond Strong bond Metallic bond Weak intermolecular force None Hint 26. Noble gases are chemically: Metallic Very reactive Radioactive Inert None Hint 27. Water (H₂O) is formed by: Metallic bond Covalent bond Hydrogen bond only Ionic bond None Hint 28. The bond in methane (CH₄) is: Ionic Hydrogen Metallic Covalent None Hint 29. Transition elements are found in: p-block d-block s-block f-block None Hint 30. Ionic compounds conduct electricity in: Gas state Solid state only Molten or aqueous state Dry state None Hint 31. The smallest atom in the periodic table is: Hydrogen Fluorine Oxygen Helium None Hint 32. Sodium chloride (NaCl) is an example of: Covalent compound Ionic compound Metallic compound Organic compound None Hint 33. Elements in the same period have the same: Chemical properties Number of shells Atomic mass Valency None Hint 34. The force that holds atoms together in a molecule is: Chemical bond Magnetic force Friction Gravitational force None Hint 35. Covalent bond is formed by: Sharing of electrons Gain of neutrons Transfer of electrons Loss of protons None Hint 36. Metals form bonds by: Sharing electrons Losing electrons Losing neutrons Gaining electrons None Hint 37. The reactivity of metals increases down the group because: Nuclear charge decreases Mass decreases Atomic size decreases Atomic size increases None Hint 38. The valency of oxygen is: 1 3 2 4 None Hint 39. Halogens belong to: Group 16 Group 1 Group 17 Group 18 None Hint 40. Valency of Group 1 elements is: 2 3 1 0 None Hint 41. The most reactive non-metal is: Oxygen Fluorine Nitrogen Chlorine None Hint 42. Elements with similar properties are placed in the same: Row Group Block Period None Hint 43. A horizontal row in the periodic table is called a: Family Block Group Period None Hint 44. Elements in the same group have the same: Density Atomic mass Valence electrons Number of shells None Hint 45. Non-metals usually form bonds by: Losing neutrons Sharing or gaining electrons Losing electrons Losing protons None Hint 46. Atomic number represents the number of: Protons Nucleons Neutrons Electrons only None Hint 47. Atoms combine to achieve: More neutrons Higher mass Lower energy and stability Instability None Hint 48. Covalent compounds generally: Conduct electricity Are hard solids Are metals Do not conduct electricity None Hint 49. Mendeleev arranged elements in order of increasing: Atomic mass Density Valency Atomic number None Hint 50. Chemical bonding helps atoms to: Become unstable Lose mass Gain neutrons Achieve noble gas configuration 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
