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