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 oxidation number of sulphur in H2SO4 is_______

2 / 59

Rusting occurs on___________

3 / 59

Chemical formula of sodium hyposulphite is _____________

4 / 59

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

5 / 59

The oxidation number of Group-I elements is_________

6 / 59

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

7 / 59

Which of the following is NOT an electrolyte?

8 / 59

Which metal has a great tendency to corrosion?

9 / 59

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

10 / 59

Sodium hyposulphite dissolves____________

11 / 59

Cl2 gas is formed, when Cl ions are_________

12 / 59

Which of the following is a good electrolyte?

13 / 59

The oxidation number of hydrogen in metal hydrides is________

14 / 59

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

15 / 59

The oxidation number of chromium in K2Cr2O7 is____________

16 / 59

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

17 / 59

In Nelson’s cell, cathode is made up of__________

18 / 59

Oxidation always takes place at_______________

19 / 59

The percentage of silver in sterling silver is_______

20 / 59

The most common example of corrosion is________

21 / 59

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

22 / 59

Corrosion of iron is called____________

23 / 59

Stainless steel contains___________

24 / 59

The oxidation number of oxygen is +2 in_________

25 / 59

Pure water is a ___________

26 / 59

Oxidation involves__________

27 / 59

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

28 / 59

In HCl, oxidation number of H is_________

29 / 59

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

30 / 59

The oxidation number of all elements in free state is_______

31 / 59

Oxidizing agent is a substance which___________

32 / 59

Which is produced as a result of Redox reaction?

33 / 59

Which ionizes in small extent in water___________

34 / 59

Which is not a property of fine silver?

35 / 59

In galvanic cell cathode electrode carries__________

36 / 59

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

37 / 59

Spontaneous chemical reactions take place in____________

38 / 59

Who invented first electrolytic cell?

39 / 59

Which of the following is NOT an electrolytic cell?

40 / 59

Which of the following is a non-electrolyte?

41 / 59

Which acts as anode in Down’s cell?

42 / 59

The electrolytic cell is made up of____________

43 / 59

In which cell electrical energy is converted into chemical energy?

44 / 59

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

45 / 59

Sterling silver is an alloy of silver and________

46 / 59

Which of the following is a weak electrolyte?

47 / 59

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

48 / 59

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

49 / 59

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

50 / 59

  1. Chemical formula of rust is__________

51 / 59

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

52 / 59

Formation of water from hydrogen and oxygen is________

53 / 59

Sodium hydroxide is manufactured in__________

54 / 59

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

55 / 59

Example of electrolytic cell is___________

56 / 59

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

57 / 59

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

58 / 59

Which of the following is a corrosion resistant metal?

59 / 59

Which medium accelerates the process of rusting?

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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