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