SSLC Science and Technology NIOS VIII Welcome to your SSLC Science and Technology NIOS VIII Total Questions: 50 Name Mobile No: 1. Freezing point of water is: 5°C 10°C –5°C 0°C None Hint 2. Process of water turning into vapour is: Evaporation Freezing Condensation Melting None Hint 3. Air is a mixture of: Metals Solids Liquids Gases None Hint 4. Process of vapour turning into water is: Melting Evaporation Condensation Sublimation None Hint 5. Law of segregation was given by: Newton Mendel Darwin Lamarck None Hint 6. XY chromosome represents: Male None Both Female None Hint 7. Main cause of air pollution is: Trees Soil Rivers Vehicles and industries None Hint 8. A change in gene is called: Variation Selection Mutation Evolution None Hint 9. DNA stands for: Deoxyribonucleic Acid Dinucleic Acid Double Nitric Acid None None Hint 10. The major component of air is: Oxygen Hydrogen Carbon dioxide Nitrogen None Hint 11. Boiling point of water is: 50°C 100°C 120°C 75°C None Hint 12. Mendel’s law explains: Inheritance of traits Energy Light Motion None Hint 13. Method to purify water at home: Freezing Heating slightly Boiling Mixing soil None Hint 14. The basic unit of heredity is: Organ Cell Tissue Gene None Hint 15. Chromosomes are made of: DNA and protein Fat RNA only Protein only None Hint 16. Number of chromosomes in human gamete is: 44 46 22 23 None Hint 17. When alleles are different it is called: Clone Homozygous Pure Heterozygous None Hint 18. Excess nutrients in water causes: Condensation Evaporation Pollution Eutrophication None Hint 19. Genes are located on: Mitochondria Chromosomes Ribosomes Cytoplasm None Hint 20. The hidden trait is called: Dominant Recessive Allele Gene None Hint 21. Hard water contains: Calcium and magnesium salts Carbon dioxide Nitrogen Oxygen None Hint 22. Acid rain is caused by: Oxygen Carbon Hydrogen Nitrogen and sulphur oxides None Hint 23. Genetic makeup of organism is: Phenotype Mutation Trait Genotype None Hint 24. Heredity is the transmission of: Energy Diseases Food Traits from parents to offspring None Hint 25. When both alleles are same it is called: Hybrid Homozygous Mutation Heterozygous None Hint 26. Sudden heritable change is: Adaptation Variation Selection Mutation None Hint 27. Safe drinking water should be: Clear and germ free Dirty Coloured Salty None Hint 28. Father of Genetics is: Lamarck Mendel Darwin Watson None Hint 29. Alternative forms of a gene are called: Genes Traits Cells Alleles None Hint 30. Gas required for respiration is: Carbon dioxide Helium Nitrogen Oxygen None Hint 31. Main source of water pollution: Sunlight Sewage and industrial waste Trees Wind None Hint 32. Air contains water vapour which causes: Rain Heat Light Wind None Hint 33. Gas responsible for global warming is: Carbon dioxide Oxygen Nitrogen Helium None Hint 34. Freezing point of water is: 0°C –5°C 10°C 5°C None Hint 35. XX chromosome represents: Both None Female Male None Hint 36. Ozone layer protects us from: Heat Rain UV rays Dust None Hint 37. Conservation of water means: Polluting water Saving water Heating water Wasting water None Hint 38. Fresh water is mainly found in: Rivers and lakes Atmosphere Oceans Seas None Hint 39. Water covers about ____ of Earth surface: 50% 30% 10% 71% None Hint 40. Soft water is good for: Irrigation only Cooking only Drinking only Washing and cleaning None Hint 41. Water cycle includes: Condensation Evaporation Precipitation All of these None Hint 42. Percentage of oxygen in air is about: 50% 1% 21% 78% None Hint 43. Plants use carbon dioxide for: Excretion Photosynthesis Digestion Respiration None Hint 44. Number of chromosomes in human body cell is: 23 46 48 44 None Hint 45. The genetic material is: Protein DNA Sugar Fat None Hint 46. Mendel experimented on: Rice Maize Pea plant Wheat None Hint 47. Physical expression of gene is: Phenotype Genotype Mutation Allele None Hint 48. The trait which appears in F1 generation is: Mutant Recessive Hidden Dominant None Hint 49. Study of heredity and variation is called: Genetics Chemistry Physics Biology None Hint 50. Passing of characters from parents to offspring is: Evolution Mutation Selection Heredity None Hint Time's up Share: admin Previous post SSLC Science and Technology NIOS VII February 12, 2026 Next post SSLC Science and Technology NIOS IX February 12, 2026
