Chemistry class-9 chapter-7 pdf

Chemistry Notes for Class 9 Chapter 7

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Chemistry Ch#07, 9th Class

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1 / 59

The electrolytic cell is made up of____________

2 / 59

A region on iron surface when rusting takes place is known as____________

3 / 59

Who invented first electrolytic cell?

4 / 59

Which cell is used in the manufacturing of sodium metal from fused NaCl?

5 / 59

Which of the following is NOT an electrolyte?

6 / 59

The substances which do not ionize in solution and do not allow to pass current through them are called________

7 / 59

Which acts as anode in Down’s cell?

8 / 59

Which gas is evolved during the electrolysis of fused sodium chloride?

9 / 59

Nelson’s cell is used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?

10 / 59

Corrosion of iron is called____________

11 / 59

Example of electrolytic cell is___________

12 / 59

The oxidation number of Group-I elements is_________

13 / 59

The percentage of silver in sterling silver is_______

14 / 59

The oxidation number of sulphur in H2SO4 is_______

15 / 59

Which is not a property of fine silver?

16 / 59

Which of the following is a common example of silver plating?

17 / 59

In which cell electrical energy is converted into chemical energy?

18 / 59

Which of the following is a good electrolyte?

19 / 59

Cl2 gas is formed, when Cl ions are_________

20 / 59

Which of the following is a non-electrolyte?

21 / 59

A process of coating a thin layer of Zn on iron is called___________

22 / 59

Which of the following is a weak electrolyte?

23 / 59

In HCl, oxidation number of H is_________

24 / 59

The percentage of any metal can make up the non-silver portion of a sterling is_______

25 / 59

In galvanic cell cathode electrode carries__________

26 / 59

The most common example of corrosion is________

27 / 59

Pure water is a ___________

28 / 59

The oxidation number of chromium in K2Cr2O7 is____________

29 / 59

Which of the following is a corrosion resistant metal?

30 / 59

  1. Chemical formula of rust is__________

31 / 59

Oxidizing agent is a substance which___________

32 / 59

In Nelson’s cell, cathode is made up of__________

33 / 59

Sodium hyposulphite dissolves____________

34 / 59

Chemical formula of sodium hyposulphite is _____________

35 / 59

During electrolysis of sodium chloride in aqueous state, which gas is evolved from the cathode electrode?

36 / 59

Oxidation involves__________

37 / 59

In the Redox reaction between Zn and HCI, the oxidizing agent is_______

38 / 59

The oxidation number of hydrogen in metal hydrides is________

39 / 59

In early nineteenth century photographers produce crude images using papers covered with_____

40 / 59

During the formation of water from hydrogen and oxygen, which of the: following does not occur?

41 / 59

Oxidation always takes place at_______________

42 / 59

Formation of water from hydrogen and oxygen is________

43 / 59

Which of the following is NOT an electrolytic cell?

44 / 59

Stainless steel contains___________

45 / 59

In neutral molecules, the algebraic sum of the oxidation numbers of all the elements is______

46 / 59

Which medium accelerates the process of rusting?

47 / 59

Sterling silver is an alloy of silver and________

48 / 59

Which ionizes in small extent in water___________

49 / 59

Rusting occurs on___________

50 / 59

The branch of chemistry which deals with the relationship between electricity and chemical reactions.

51 / 59

Which metal has a great tendency to corrosion?

52 / 59

Spontaneous chemical reactions take place in____________

53 / 59

The oxidation number of all elements in free state is_______

54 / 59

Sodium hydroxide is manufactured in__________

55 / 59

Which ion is not formed during electrolysis of aqueous sodium chloride?

56 / 59

Which is produced as a result of Redox reaction?

57 / 59

The oxidation number of oxygen is +2 in_________

58 / 59

In order to give longer life, the containers of iron are coated by_________

59 / 59

Chemical reaction in which the oxidation state of one or more substances changes are called____

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Chemistry Notes, Problems for Class 9th

Chemistry, a new subject for 9th Class, having a lot of concepts, starting from a single definition of the smallest particle of our universe which is called ‘atom’. In the 8th grade usually, we have to study only one book of science that combines chemistry, physics, and biology. But as, we got into 9th class and with every passing day things starts to get more complex now. similarly we got three books instead of just one science book.

And, if you any student of 9th Class feeling difficult to understand the concept of chemistry. Then, these chemistry notes for class 9 are enough. by Understanding chemistry Notes for 9th class means remembering a lot of concepts. Consider that particular subject important in which you want to study for your whole life. And, read more than just the textbook about that particular subject. If you think you want to study chemistry for your whole life that’s great, our country also need chemists.

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Chapter wise PDF Notes / Problems / Solution of Chemistry 9th Class

                     Chapter-01 – Fundamentals of Chemistry

                     Chapter-02 – Structure of Atoms 

                     Chapter-03 – Periodic Table and Periodicity of Properties

                     Chapter-04 – Structure of Molecules 

                     Chapter-05 – Physical States of Matter 

                     Chapter-06 – Solutions 

                     Chapter-07 – Electrochemistry 

                     Chapter-08 – Chemical Reactivity 

                     Pairing Scheme for 2021 – Chemistry 9th Class