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