Q1. The acidic nature of acids is due to the presence of:
Q2. Adding water to concentrated acid is dangerous because:
Q3. Curd should not be stored in copper vessels because:
Q4. Hydrogen ions are represented correctly as:
Q5. Which oxide is acidic?
Q6. Which substance conducts electricity in aqueous solution?
Q7. Carbon dioxide is classified as a:
Q8. The reaction of acid with base always results in:
Q9. Alkalis are described as:
Q10. Dry HCl gas does not show acidic nature because:
Q11. Effervescence during reaction of a compound with acid indicates formation of:
Q12. Dilution results in:
Q13. While diluting an acid, the acid should be added to:
Q14. Non-metallic oxides generally react with:
Q15. Lime water is a solution of:
Q16. Which solution does NOT show acidic behaviour?
Q17. The gas evolved when calcium carbonate reacts with acid is tested using:
Q18. Sodium hydroxide in water produces:
Q19. HCl shows acidic character only in:
Q20. The cation responsible for acidic properties is:
Q21. The process of reducing concentration of acid or base is called:
Q22. Carbon dioxide reacts with calcium hydroxide to form:
Q23. The reaction of a non-metallic oxide with a base shows that non-metallic oxides are:
Q24. Hydrogen ions cannot exist independently because they:
Q25. Concentrated sulphuric acid should be handled with care because it:
Q26. Which compound produces H₃O⁺ ions in water?
Q27. Which of the following is an alkali?
Q28. Which ion is common to all bases?
Q29. Bases generate which ion in water?
Q30. The products of neutralisation reaction are:
Q31. H⁺ ions react with OH⁻ ions to form:
Q32. All acids show similar chemical properties because they produce:
Q33. The bulb glows only in acid solution because:
Q34. Calcium carbonate reacts with hydrochloric acid to form calcium chloride, water and:
Q35. The glowing of a bulb in acid solution indicates:
Q36. Neutralisation reaction involves:
Q37. Hydrogen gas is identified by:
Q38. If a gas extinguishes a burning candle, the gas is likely to be:
Q39. Hydrogen ions exist in aqueous solution as:
Q40. Bases that dissolve in water are called:
Q41. Which ion is common to all acids?
Q42. Which of the following solutions conducts electricity?
Q43. Acids react with metals to form:
Q44. Dissolving an acid in water is a:
Q45. Sour substances corrode metal vessels because they are:
Q46. Which reaction explains acidic nature of CO₂?
Q47. The gas usually liberated when an acid reacts with a metal is:
Q48. Which base forms OH⁻ ions in water?
Q49. Electric current in acid solutions is carried by:
Q50. Glucose and alcohol solutions do not conduct electricity because they: