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