Acids Bases Salts Set-A

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CHAPTER 1: Acids, Bases & Indicators

About This Chapter: This chapter introduces the fundamental concepts of acids and bases, their properties (taste, feel, and behaviour with indicators), and the different types of indicators used to identify them. It covers natural indicators (litmus, turmeric, red cabbage), synthetic indicators (phenolphthalein, methyl orange), and olfactory indicators (onion, vanilla, clove oil) that work by smell change. The chapter emphasizes that acids are sour, bases are bitter and soapy, and neutral substances like distilled water have no effect on indicators. It also introduces the neutralization concept where acids and bases cancel each other's properties. These foundational ideas are essential for understanding the pH scale, salt formation, and the practical applications of acids and bases in daily life, such as treating acidity, dealing with insect stings, and preparing remedies for various conditions.

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📌 Quiz: SCIENCE
📚 Subject: CHEMISTRY
🏫 Class: CLASS 10
📖 Chapter: Acids Bases Salts-A
📝 Questions: 50

📘 SCIENCE

CHEMISTRY | Acids Bases Salts-A
📝 Questions: 50 ⏱️ Timer: 20 min
Q1. Calcium hydroxide is chemically represented as:
Q2. Which of the following substances is classified as an acid?
Q3. Which indicator works by detecting a change in smell?
Q4. Acids and bases neutralise each other because:
Q5. Magnesium hydroxide is correctly represented as:
Q6. The process by which acids and bases cancel each other's effect is called:
Q7. Which substance is used as an olfactory indicator?
Q8. The colour of neutral litmus solution is:
Q9. Acids generally have which taste?
Q10. Indicators determine whether a substance is acidic or basic by showing:
Q11. Litmus is best described as a:
Q12. Bitter taste in food is due to the presence of:
Q13. Clove oil can act as which type of indicator?
Q14. Natural substances that indicate the presence of acids or bases are called:
Q15. Litmus solution is naturally which colour?
Q16. Red litmus paper turns blue in which type of solution?
Q17. Cloth strips soaked with onion extract are used to test:
Q18. Which indicator appears purple in a neutral solution?
Q19. Litmus solution is extracted from which organism?
Q20. Distilled water is:
Q21. Lichen belongs to which division of plants?
Q22. The smell of onion disappears in which medium?
Q23. Ammonium hydroxide has the chemical formula:
Q24. Which flower petals can act as natural indicators?
Q25. A curry stain turns reddish-brown when scrubbed with soap because soap is:
Q26. The correct remedy for acidity after overeating is:
Q27. Which of the following substances is a base?
Q28. If red litmus paper shows no colour change, the solution may be:
Q29. Sour taste in food is due to the presence of:
Q30. Baking soda solution is used as a remedy for acidity because it is:
Q31. Substances whose odour changes in acidic or basic media are called:
Q32. Bases change red litmus paper to which colour?
Q33. The smell of vanilla essence disappears in which medium?
Q34. To test acids and bases in the laboratory, substances are placed on:
Q35. Indicators help us identify whether a substance is:
Q36. Turmeric is an example of which type of indicator?
Q37. Phenolphthalein remains colourless in which type of solution?
Q38. Which of the following is NOT an indicator?
Q39. Red cabbage leaves can act as:
Q40. Neutralisation is useful in treating which condition?
Q41. Bases generally have which taste?
Q42. Another synthetic indicator used to test acids and bases is:
Q43. Which of the following is a synthetic indicator?
Q44. Onion strips are stored overnight in a refrigerator to:
Q45. Acetic acid is represented by the formula:
Q46. Soap is basic in nature because it:
Q47. Methyl orange turns red in which medium?
Q48. The reddish-brown turmeric stain turns yellow again after washing with water because:
Q49. Onion can be used as which type of indicator?
Q50. Acids change blue litmus paper to which colour?

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