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