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