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📘 SCIENCE
SCIENCE | ACIDS BASES AND SALTS-F
📝 Questions: 50
⏱️ Timer: 20 min
Q1. Sodium hydrogen carbonate neutralises stomach acid because it is:
Q2. Baking powder contains baking soda and:
Q3. The gas responsible for making cakes and bread fluffy is:
Q4. Acidic nature of a substance is due to:
Q5. When water is added back to anhydrous copper sulphate, the blue colour:
Q6. Strong acid shows:
Q7. Tartaric acid is added to baking soda in baking powder to:
Q8. The common name of CaOCl₂ is:
Q9. Mixing acid with water is:
Q10. Egg-shell reacts with acid to give CO₂, hence the acid present is:
Q11. Acid reacting with metal produces:
Q12. A neutral solution has pH:
Q13. Copper sulphate crystals appear blue because of:
Q14. Acid-base indicators are:
Q15. Acids do not show acidic behaviour without water because:
Q16. The formula of hydrated copper sulphate is:
Q17. Fresh milk has pH 6; as it turns into curd, pH:
Q18. Plaster of Paris should be stored in a moisture-proof container because:
Q19. Heating copper sulphate removes:
Q20. Bleaching powder is prepared using:
Q21. The medicine used for indigestion is:
Q22. The sodium compound used for softening hard water is:
Q23. Basic nature of a substance is due to:
Q24. A basic solution has pH:
Q25. The term 10H₂O in Na₂CO₃·10H₂O represents:
Q26. Plaster of Paris is used for:
Q27. Gypsum has the chemical formula:
Q28. The pH scale ranges from:
Q29. When sodium hydrogen carbonate solution is heated, it forms:
Q30. On heating sodium hydrogen carbonate, it decomposes to form:
Q31. The reaction of acid with base always produces:
Q32. Washing soda is a:
Q33. Acidic and basic solutions conduct electricity because they produce:
Q34. Sodium hydrogen carbonate is used in:
Q35. Plaster of Paris is obtained by heating gypsum at:
Q36. Water of crystallisation is:
Q37. Washing soda is obtained by recrystallisation of:
Q38. Chemical formula of Plaster of Paris is:
Q39. Baking soda added to milk delays curd formation because:
Q40. Acid reacting with metal carbonate produces:
Q41. On heating copper sulphate crystals, their colour becomes:
Q42. Heating NaHCO₃ produces carbon dioxide, water and:
Q43. Washing soda is used in:
Q44. Plaster of Paris reacts with water to form:
Q45. Washing soda has the chemical formula:
Q46. Distilled water does not conduct electricity because it:
Q47. Washing soda is used to remove:
Q48. A solution turning red litmus blue has pH close to:
Q49. Plaster of Paris is named so because:
Q50. Plaster of Paris is chemically:
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