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