RRB Group D - Acids bases and salts Online Test (MCQ Quiz)

1. Which of the following is a characteristic property of acids?

A) They taste bitter B) They feel soapy to touch C) They turn red litmus paper blue D) They turn blue litmus paper red

2. Bases typically exhibit which of the following properties?

A) They taste sour B) They have a pH greater than 7 C) They turn blue litmus paper red D) They react with metals to produce hydrogen gas

3. What is the pH range for acidic solutions?

A) pH < 7 B) pH = 7 C) pH > 7 D) pH = 0

4. A solution with a pH of 7 is considered to be:

A) Acidic B) Basic C) Neutral D) Strongly acidic

5. Which of the following is a strong acid?

A) Acetic acid B) Carbonic acid C) Hydrochloric acid D) Citric acid

6. Which of the following is a weak base?

A) Sodium hydroxide B) Potassium hydroxide C) Ammonium hydroxide D) Calcium hydroxide

7. When an acid reacts with a base, what are the typical products formed?

A) Salt and water B) Hydrogen gas and oxygen gas C) Carbon dioxide and water D) Salt and hydrogen gas

8. The reaction between an acid and a base is called:

A) Oxidation B) Reduction C) Neutralization D) Combustion

9. What is the chemical formula for common salt (sodium chloride)?

A) NaCl B) HCl C) NaOH D) H2O

10. Which acid is found in vinegar?

A) Citric acid B) Lactic acid C) Acetic acid D) Formic acid

11. Lemon juice is sour due to the presence of which acid?

A) Malic acid B) Ascorbic acid C) Tartaric acid D) Citric acid

12. Which of the following is an example of an amphoteric substance?

A) Sodium chloride B) Water C) Sulfuric acid D) Ammonia

13. What is the main component of antacids used to relieve indigestion?

A) Sodium bicarbonate B) Magnesium hydroxide C) Aluminum hydroxide D) All of the above

14. Which gas is produced when a metal reacts with an acid?

A) Oxygen B) Carbon dioxide C) Hydrogen D) Nitrogen

15. The pH of pure water at 25°C is:

A) 0 B) 7 C) 14 D) 1

16. Which indicator turns red in acidic solutions and blue in basic solutions?

A) Phenolphthalein B) Methyl orange C) Litmus D) Thymol blue

17. Phenolphthalein is colorless in acidic solutions and pink in basic solutions. This property makes it useful as a:

A) pH indicator B) Drying agent C) Catalyst D) Solvent

18. What is the chemical name for baking soda?

A) Sodium chloride B) Sodium carbonate C) Sodium bicarbonate D) Potassium nitrate

19. Washing soda is chemically known as:

A) Sodium bicarbonate B) Sodium chloride C) Sodium hydroxide D) Sodium carbonate decahydrate

20. Which acid is used in lead-acid batteries?

A) Hydrochloric acid B) Nitric acid C) Sulfuric acid D) Phosphoric acid

21. The sour taste of curd is due to the presence of which acid?

A) Acetic acid B) Citric acid C) Lactic acid D) Oxalic acid

22. What is the common name for calcium hydroxide?

A) Quicklime B) Slaked lime C) Caustic soda D) Soda ash

23. Quicklime is the common name for:

A) Calcium hydroxide B) Calcium carbonate C) Calcium oxide D) Calcium chloride

24. Which of the following is an acidic salt?

A) Sodium chloride B) Sodium sulfate C) Sodium bisulfate D) Sodium carbonate

25. A basic salt is formed when:

A) A strong acid reacts with a strong base B) A weak acid reacts with a strong base C) A strong acid reacts with a weak base D) A weak acid reacts with a weak base

26. The pH of acid rain is typically:

A) Greater than 7 B) Equal to 7 C) Less than 5.6 D) Exactly 7

27. Which gas is primarily responsible for acid rain?

A) Carbon dioxide B) Nitrogen dioxide and sulfur dioxide C) Oxygen D) Methane

28. The process of adding a base to an acid (or vice versa) to determine its concentration is called:

A) Titration B) Distillation C) Filtration D) Evaporation

29. The point at which the acid and base have completely neutralized each other in a titration is known as the:

A) Endpoint B) Equivalence point C) Indicator point D) Buffer point

30. Which of the following is a natural indicator obtained from lichens?

A) Phenolphthalein B) Methyl orange C) Litmus D) Turmeric

31. The chemical formula for slaked lime is:

A) CaO B) Ca(OH)2 C) CaCO3 D) CaCl2

32. Which acid is used in the manufacture of fertilizers?

A) Hydrochloric acid B) Nitric acid C) Sulfuric acid D) Phosphoric acid

33. The characteristic property of a base that it feels soapy to touch is due to:

A) Its reaction with skin oils B) Its high viscosity C) Its ionic nature D) Its ability to dissolve in water

34. What is the pH of a strong acid solution?

A) Around 7 B) Between 0 and 3 C) Between 4 and 6 D) Above 7

35. Which of the following is a salt of a strong acid and a strong base?

A) Ammonium chloride B) Sodium acetate C) Sodium chloride D) Copper sulfate

36. What is the primary function of salts in biological systems?

A) Energy storage B) Catalysis of reactions C) Maintaining fluid balance and nerve impulse transmission D) Building muscle tissue

37. Which metal reacts with dilute hydrochloric acid to produce hydrogen gas?

A) Copper B) Silver C) Mercury D) Zinc

38. The chemical formula for carbonic acid is:

A) H2CO3 B) HCOOH C) CH3COOH D) H2SO4

39. What is the common name for sodium hydroxide?

A) Baking soda B) Caustic soda C) Washing soda D) Quicklime

40. Which acid is responsible for the sting of an ant?

A) Acetic acid B) Citric acid C) Formic acid D) Lactic acid

41. A solution that resists changes in pH when small amounts of acid or base are added is called a:

A) Neutral solution B) Buffer solution C) Concentrated solution D) Dilute solution

42. Which of the following is a basic salt?

A) Ammonium chloride B) Sodium bisulfate C) Sodium carbonate D) Potassium nitrate

43. What is the chemical formula for calcium carbonate?

A) CaO B) Ca(OH)2 C) CaCO3 D) CaCl2

44. The reaction of an acid with a metal carbonate produces:

A) Salt and water B) Salt, water, and carbon dioxide C) Salt and hydrogen gas D) Salt and oxygen gas

45. Which substance is used to neutralize excess acid in the stomach?

A) Vinegar B) Baking soda C) Salt water D) Sugar

46. What is the pH of a strong base solution?

A) Around 7 B) Between 0 and 3 C) Between 11 and 14 D) Exactly 7

47. Which of the following is a neutral salt?

A) Sodium acetate B) Ammonium chloride C) Potassium nitrate D) Copper sulfate

48. The process of dissolving a salt in water can result in a solution that is acidic, basic, or neutral depending on the nature of the parent acid and base. This is known as:

A) Hydrolysis of salts B) Neutralization C) Dissociation D) Ionization

49. Which acid is present in sour milk?

A) Citric acid B) Malic acid C) Lactic acid D) Oxalic acid

50. The indicator methyl orange is red in acidic solutions, yellow in basic solutions, and orange in neutral solutions. This makes it suitable for titrating:

A) A strong acid with a strong base B) A strong acid with a weak base C) A weak acid with a strong base D) A weak acid with a weak base

Acids bases and salts - Online Test

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