Himachal Pradesh Science - Practice Mock Test Set 21

1. Which is an acidic oxide?
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2. Maximum oxidation state of osmium (Os)
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3. No. of unpaired electrons in Ni²⁺
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4. Most stable form of carbon thermodynamically
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5. Which oxide is neutral?
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6. Percentage of lead in lead pencil
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7. Ions produced from complex [Co(NH₃)₆]Cl₂ in solution
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8. Carbon has oxidation number zero in
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9. Maximum hydrogen bonds formed by one H₂O molecule
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10. Which acts as rocket propellant?
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11. Potassium metal is stored in
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12. Chemical formula of Plaster of Paris
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13. Reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe is
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14. Phenolphthalein turns pink in which solution?
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15. Lightest metal floating on water
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16. Gases show which property due to high speed & large spacing?
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17. Rutherford alpha scattering discovered
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18. Radioactive isotope of hydrogen
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19. Test to differentiate 1°, 2°, 3° amines
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20. Auto-reduction process NOT used for which metal?
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21. IUPAC name of m-Cresol
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22. Test to distinguish acetaldehyde & acetone
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23. Species initiating nitration of benzene
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24. Element with atomic no. 57 belongs to
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25. चन्द्रग्रहणं कदा भवति ?
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Boost Your Himachal Pradesh Science Exam Preparation

Welcome to the ultimate online preparation hub for the upcoming Himachal Pradesh Competitive Board Exams. Achieving a top rank in state-level selection pipelines requires consistent revision and target accuracy drills. This specialized HP Science Practice Set 21 | Interactive MCQ Mock Test module has been meticulously curated using authentic old question papers and highly recommended syllabus blueprints. By attempting these interactive multiple-choice questions (MCQs), you can instantly assess your answer speed, elimination skills, and core subject knowledge. Navigating through our systematic mock test question blocks systematically ensures you cover every high-weightage topic efficiently without fatigue. Stay ahead of the competition, track your progress points across multiple evaluation iterations, and unlock your true scoring potential for all upcoming Himachal Pradesh Govt Jobs.