Chapter No.2: Acid Base And Salt -Chemistry For Class X (2022 and Onward) - Multiple Choice Questions, Fill in the blanks, Concept Diagram

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Acid Base And Salt
MULTIPLE CHOICE QUESTIONS (MCQs)

Tick the correct answer from the following:
1. Corrosive effect on skin is caused by:
(a) acid ✔
(b) base
(c) salt
(d) both a & b

2. Preservatives are used to preserve:
(a) acids
(b) bases
(c) food ✔
(d) water

3. Which of the following is not an Arrhenius acid?
(a) HCl
(b) CO₂ ✔
(c) HNO₃
(d) H₂SO₄

4. NH₃ can be a base according to:
(a) Arrhenius theory
(b) Bronsted-Lowery theory
(c) Lewis theory ✔
(d) both b and c

5. Which of the following is a Lewis base?
(a) HNO₃
(b) CN ✔
(c) HCl
(d) AlCl₃

6. A substance that can donate a pair of electron to form coordinate covalent bond:
(a) Lewis acid
(b) Lewis base ✔
(c) Bronsted—Lowery acid
(d) Bronsted-Lowery base

7. If pH value is greater than 7, then solution is:
(a) acidic
(b) basic ✔
(c) amphoteric
(d) neutral

8. Salt among following is:
(a) HCl
(b) KCl ✔
(c) HNO₃
(d) H₂SO₄

9. Substances that react with both acids and bases are called:
(a) conjugate acids
(b) conjugate bases
(c) amphoteric substances ✔
(d) Buffers

10. The reaction of acid and base to form salt and water is called:
(a) hydration
(b) Neutralization ✔
(c) hydrolysis
(d) both a & c

11. Curd, vinegar, lemon, and orange juice have a sour flavor, they are:
(a) acidic ✔
(b) basic
(c) amphoteric
(d) neutral

12. Bitter-gourd, coffee, and chocolate have a bitter flavor, they are:
(a) acidic
(b) basic ✔
(c) amphoteric
(d) neutral

13. Alum is an example of:
(a) acids
(b) bases
(c) salts ✔
(d) neutral

14. It is used in batteries, paints, paper, fertilizer, detergent, and fertilizers.
(a) HCl
(b) H₂SO₄  ✔
(c) NaOH 
(d) Ca(OH)₂

15. In our stomach, it is utilized to breakdown food.
(a) HCl ✔
(b) H₂SO₄
(c) NaOH
(d) Ca(OH)₂

16. It is utilized in the soap and paper industries:
(a) HCl
(b) H₂SO₄
(c) NaOH ✔
(d) Ca(OH)₂

17. Cement and plaster of Paris are both made from:
(a) HCl
(b) H₂SO₂
(c) NaOH
(d) Ca(OH)₂ ✔

18. It is used in the production of fertilizers.
(a) Silver bromide
(b) Calcium chloride
(c) Ammonia ✔
(d) Calcium hydroxide

19. Silver bromide is used in:
(a) fertilizers
(b) photography ✔
(c) medicines
(d) paper industry

20. It is utilized as a drying agent:
(a) Silver bromide
(b) Calcium chloride ✔
(c) Ammonia
(d) Calcium hydroxide

21. According to Arrhenius theory, when acids are dissolved in water, they produce:
(a) hydrogen (H⁺) ions ✔
(b) hydroxide ions (OH^-)
(c) protons
(d) electrons

22. According to Arrhenius theory, when bases are dissolved in water, they produce:
(a) hydrogen (H⁺) ions
(b) hydroxide ions (OH^-) ✔
(c) protons
(d) electrons

23. A salt is a/an:
(a) ionic compound ✔
(b) covalent compound
(c) Both 'a' & 'b'
(d) None of them

24. According to Bronsted-Lowry theory, an acid:
(a) produces hydrogen (H⁺) ions
(b) produces hydroxide ions (OH^-)
(c) donates a proton (H⁺) ✔
(d) accepts a proton (H⁺)

25. According to Bronsted-Lowry theory, a base:
(a) produces hydrogen (H⁺) ions
(b) produces hydroxide ions (OH^-)
(c) donates a proton (H⁺)
(d) accepts a proton (H⁺) ✔

26. A Lewis acid is an:
(a) a proton donor
(b) a proton acceptor
(c) an electron pair acceptor ✔
(d) an electron pair donor

27. BF, is a Lewis:
(a) acid ✔
(b) base
(c) salt
(d) neutral

28. Pure water is considered as a:
(a) strong electrolyte
(b) weak electrolyte ✔
(c) strong base
(d) weak base

29. pH is the measurement of the concentration of Hydrogen ions in a solution. Which is true for pH?
(a) log[H⁺]
(b) log[OH^-]
(c) -log[H⁺] ✔
(d) -log[OH^-]

30. It can be defined mathematically as - log[OH^-].
(a) pH
(b) pOH ✔
(c) pH scale
(d) pOH scale

31. pH Scale has values ranging from zero to:
(a) 7
(b) 10
(c) 12
(d) 14 ✔

32. NH₄C1₂, NaHSO₄ and NaH₂P0₄ are examples of:
(a) acidic salts ✔
(b) basic salts
(c) neutral salts
(d) All of them

33. Acidic salt solutions have pH:
(a) zero
(b) less than 7 ✔
(c) greater than 7
(d) greater than 14

34. Which one of these is a basic salt?
(a) NH₄Cl₂
(b) Na₂HSO₄
(c) CH₃COONa ✔
(d) KCl

35. Which one of these has pH more than 7?
(a) Acidic Salts
(b) Basic Salts
(c) Neutral Salts
(d) None of these ✔

36. These salts are formed by the complete neutralization of a strong base and strong acid.
(a) Acidic Salts
(b) Basic Salts
(c) Neutral Salts ✔
(d) None of these

37. Which one of the following is NOT a neutral salt?
(a) NaCl
(b) K₂SO₄
(c) NaNO₃
(d) K₂CO₃ ✔

38. Neutral salt solutions have pH:
(a) 7 ✔
(b) less than 7
(c) greater than 7
(d) 0

39. Most of the chemical fertilizers used in agriculture by farmers are:
(a) acids
(b) bases
(c) salts ✔
(d) metals

40. It is found in plaster of Paris which is used to make plaster casts for supporting broken bones.
(a) Na₂CO₃
(b) CaSO₄.2H₂O ✔
(c) CH₃COONa
(d) NaNO₃

41. Foods such as meat, fish, dairy products, eggs and grains are:
(a) acidic ✔
(b) alkaline
(c) neutral
(d) All of them

42. Natural fats, starch and sugar are:
(a) acidic
(b) alkaline
(c) neutral ✔
(d) All of them

43. Fruits, nuts, legumes and vegetables are:
(a) acidic
(b) alkaline ✔
(c) neutral
(d) All of them