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