Class 10 science chapter 2 extra questions

Here, you are provided class 10 science chapter 2 extra questions, which will be very useful and helpful for you. You should prepare notes yourself and practice them well. These questions are based on NCERT Science chapter 2. To secure good marks in the board examinations, you should go through the activity of chapter 2.

Class 10 science chapter 2 extra questions

Class 10 science chapter 2 extra question

Class 10 science chapter 2 extra questions consist of properties of acid, base, and different salt, formation of different compounds, and their properties.

If you find any difficulty in finding answers to class 10 science chapter2  extra questions, then go through NCERT solutions of class 10 science or you can comment in the comment section, we will be very pleased to help you.

 

 

Chapter 2 Science Class 10 Extra Questions

Acids, Bases, and Salts class 10 extra questions

1.    Name some natural indicators?

2.    Name some synthetic indicators?

3.    Name the plant from which litmus solution is extracted?

4.Write the reaction of acid with the following-

i.      Metal

ii.   Metal carbonate

iii. Metal hydrogen carbonate

iv.  Base

v.   Metallic oxide

vi.  Non- metallic oxide

5What happens when carbon dioxide is passed in lime water [Ca(OH)₂ ]. Write the reaction”?

6. What happens when excess carbon dioxide is passed in lime water, write the reaction?

7.  Name some different forms of calcium carbonate?

8.   What are alkalis?

9. What is P^H scale? Draw a diagram of it?

10. Write down P^H   values for the following substances-

i.  Gastric juice

ii.   Lemon juice

iii. Pure water

iv.  Milk of magnesia

v.     Sodium  hydroxide

11. What is the P^H range in which our body works?

12. Why do we use antacid?

13. What is the chemical name and formula of milk of magnesia?

14. Write the names of acids present in the following substances-

i.     Vinegar

ii.    Orange

iii.  Tamarind

iv.  Tomato

v.      Sour milk

vi.   Lemon

vii. Ant sting

viii.  Nettle plant

15. Why the method of preparation of sodium hydroxide is called the chloralkali method?

16. Plaster of Paris should be stored in a moisture-proof container. Explain why?

17. A milkman adds a very small amount of baking soda to fresh milk.

(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?

(b) Why does this milk take a long time to set as curd?

18. Why do acids not show acidic behaviour in the absence of water?

19. Why does distilled water not conduct electricity, whereas rain water does?

20. Write the formula,  preparation method, uses and chemical reaction of preparation of the following substances –

i. Plaster of Paris

ii. Washing soda( sodium carbonate)

iii. Baking soda( sodium hydrogen carbonate)

iv.  Bleaching powder

v.     Sodium hydroxide( caustic soda)

21. Write the uses of the following substances-

i.   Hydrogen

ii. Chlorine

iii.  Hydrochloric acid

22. What happens when a solution of sodium hydrogen carbonate is heated? Give the reaction involved.

23. Why should curd and sour substances not be kept in brass and copper vessels?

24. Show that acids give hydrogen ions in water only, draw the diagram also? 

                                        Or

Do acid produce ions only in an aqueous solution or water?

  

25. Why does dry HCl gas not change the colour of the dry litmus paper?

26. Explain that solution of acids and bases conduct electricity? Draw the diagram also.

27. Draw the diagram of warning signs displayed on containers containing concentrated acids and bases.

28. Name the planet of which atmosphere is made up of thick white and yellow clouds of sulphuric acid?

29. What is the colour of litmus solution when it is neither acidic nor basic?

30. What is an olfactory indicator?

31. Name some flowers of which coloured petals are used as indicators.

32.(a)Write the name of the scale used to calculate the concentration of hydrogen ions. Give the reason for acid rain and its two bad effects.[ Annual board exam-2012]

(b). write the chemical formula of plaster of Paris and its chemical reaction with water. [Annual board exam-2012]

33. You have been provided with three test tubes. One of them contains distilled water and the other two contain acidic and alkaline (basic) solutions. If you are given only red litmus paper, how will you identify the contents of each test tube?

34. Which gas is liberated when an acid reacts with a metal?  How will you test for the presence of this gas? Draw the diagram also.

35. Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

36. Write the equation of the reaction of metal carbonate or metal hydrogen carbonate with dil. hydrochloric acid.

37. Which gas is liberated when metal carbonate or metal hydrogen carbonate reacts with dil. hydrochloric acid? How can you identify the gas? Draw the diagram also.

38. What is a neutralization reaction? Give an example.

39. Match the following-[ Annual board exam-2013

              A                             B

    I.  Strong acid                turmeric

 II.   Weak acid                 NH₄Cl

III.  Antacid                     Na₂CO

IV.   Strong base               methyl orange

V.   Weak base                 CH₃COOH

VI. Neutral salt               H₂SO₄

VII. Acidic salt               NH₄OH

VIII.Basic salt                Milk of magnesia

 IX.  Natural indicator      NaOH

 X.  Synthetic indicator   NaCl

40. Draw the diagram of P^H scale.

41. What is dilution?

42Why it is recommended that the acid should be added to water and not water to the acid?

43A substance that is fuming and highly corrosive and can dissolve metals like gold and platinum. Name the substance.

44. How the P^H in the mouth lower than 5.5 is harmful?

45. How is the concentration of hydronium ion affected when a solution of an acid is diluted?

                     Or

What happens to the concentration of hydronium or hydroxyl ion when water

is mixed into the solution of acid or base?

46. What is a universal indicator?

47. The P^H of two solutions A and B is 6 and 8 respectively-

i.      Which solution has more hydrogen ion concentration?

ii.    Which solution is basic?

iii.   Which solution is acidic?

48. Will P^H increase or decrease when the concentration of hydronium ion increases?

49. When the rain is called acidic rain?

50.  What do you mean by antacid?

51. What is the P^H values of the following-

i.     Salts of strong acid and strong base.

ii.   Strong acid and weak base.

iii.  Weak acid and strong base.

52.  What is rock salt?

53.  What is brine?

54.  Name an acid that is an ingredient of baking powder?

55.  Name one mild non-corrosive base?

56. How is HCl gas obtained? Describe it. Draw the diagram also.

57. What is baking powder?

58.  What are the main constituents of baking powder?

59.   Name the substance used in making tasty crispy pakoras?

60.    Name the substance used for faster cooking?

61.   Name the acid present in ant sting.

62.   How does baking powder make the cake or bread soft and spongy?

63. Name the substance used for removing the permanent hardness of the water. Write its chemical name and formula.

64.   On heating copper sulphate crystals, they turn green to white, why?

65. What do you mean by the water of crystallization? Give some examples.

66. Name the substance which on treatment with chlorine yields bleaching powder.

67.  What are strong acids and weak acids?

68.  Write one domestic use of sodium carbonate.

69.   What happens when gypsum is heated at 373K?

70.   Write the chemical name of plaster of Paris.

 

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Related Topics

• Chapter 2 Acids, Bases, and Salts

• MCQ Questions for Class 10 Science Chemistry Chapter 2