Chemistry class-9 chapter-7 solved exercise pdf

Chemistry Notes for Class 9 Chapter 7

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Chemistry Ch#07, 9th Class

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1 / 59

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

2 / 59

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

3 / 59

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

4 / 59

Which metal has a great tendency to corrosion?

5 / 59

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

6 / 59

Which of the following is a weak electrolyte?

7 / 59

Stainless steel contains___________

8 / 59

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

9 / 59

Rusting occurs on___________

10 / 59

  1. Chemical formula of rust is__________

11 / 59

The oxidation number of Group-I elements is_________

12 / 59

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

13 / 59

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

14 / 59

Oxidation always takes place at_______________

15 / 59

Which is produced as a result of Redox reaction?

16 / 59

The oxidation number of chromium in K2Cr2O7 is____________

17 / 59

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

18 / 59

Which is not a property of fine silver?

19 / 59

Which of the following is NOT an electrolyte?

20 / 59

The oxidation number of hydrogen in metal hydrides is________

21 / 59

The electrolytic cell is made up of____________

22 / 59

The oxidation number of sulphur in H2SO4 is_______

23 / 59

Oxidation involves__________

24 / 59

Which of the following is a corrosion resistant metal?

25 / 59

Which ionizes in small extent in water___________

26 / 59

In Nelson’s cell, cathode is made up of__________

27 / 59

Cl2 gas is formed, when Cl ions are_________

28 / 59

Which medium accelerates the process of rusting?

29 / 59

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

30 / 59

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

31 / 59

The oxidation number of oxygen is +2 in_________

32 / 59

Example of electrolytic cell is___________

33 / 59

Corrosion of iron is called____________

34 / 59

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

35 / 59

Which acts as anode in Down’s cell?

36 / 59

Which of the following is a good electrolyte?

37 / 59

Sodium hydroxide is manufactured in__________

38 / 59

Which of the following is a non-electrolyte?

39 / 59

Which of the following is NOT an electrolytic cell?

40 / 59

Formation of water from hydrogen and oxygen is________

41 / 59

In which cell electrical energy is converted into chemical energy?

42 / 59

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

43 / 59

Sterling silver is an alloy of silver and________

44 / 59

In galvanic cell cathode electrode carries__________

45 / 59

Who invented first electrolytic cell?

46 / 59

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

47 / 59

Spontaneous chemical reactions take place in____________

48 / 59

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

49 / 59

The most common example of corrosion is________

50 / 59

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

51 / 59

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

52 / 59

The percentage of silver in sterling silver is_______

53 / 59

In HCl, oxidation number of H is_________

54 / 59

The oxidation number of all elements in free state is_______

55 / 59

Chemical formula of sodium hyposulphite is _____________

56 / 59

Oxidizing agent is a substance which___________

57 / 59

Pure water is a ___________

58 / 59

Sodium hyposulphite dissolves____________

59 / 59

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

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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