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Chemistry Class 9 Chapter 8


Updated: 04 Nov 2023

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Chemistry Class 9 Chapter 8 is about “Chemical Reactivity”. This article includes the MCQs of Chemistry class 9th chapter 8.

Chemistry Class 9 Chapter 8 Notes

Chemical Reactivity Notes

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Chemistry Class 9 Chapter 8 Notes

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MCQs of Chemistry Class 9th Chapter 8

1. The Science of Chemistry revolves around Chemical_______________.
(a) Reaction
(b) Properties
(c) Compounds
Show Answer

Reaction


2. Which metal is placed in air and catches fire ?
(a) Lithium
(b) Sodium
(c) Potassium
Show Answer

Sodium


3. Metals are those substances which are ____________ of heat and electricity.
(a) Insulator
(b) Bad Conductor
(c) Good Conductor
Show Answer

Good Conductor


4. Which of the following is the characteristic property of metal?
(a) Malleable
(b) Ductile
(c) Lustra’s
(d) All of them
Show Answer

All of them


5. The Oxides and Hydroxides of metals are ___________.
(a) Bases
(b) Salts
(c) Acids
Show Answer

All of them


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6. All of the metals Except _____ exist in solid state at room temperature.
(a) Tin
(b) Mercury
(c) Lead
(d) Sliver
Show Answer

Mercury


7. When oxide of metal is dissolved in water, it forms an _______ solution and turns red litmus paper blue.
(a) Alkaline
(b) Salty
(c) Acidic
Show Answer

Alkaline


8. A metal is an element which ______ electron and forms cation
(a) Gains
(b) Shares
(c) Loses
Show Answer

Loses


9. Which of the following element lose an electron and forms a caution?
(a) Chlorine
(b) Sodium
(c) Bromine
Show Answer

Sodium


10. All three metals are _______ in nature.
(a) Electropositive
(b) Electronegative
(c) Liquid
Show Answer


11. In Group 1 of periodic table all are metals except
(a) Hydrogen
(b) Francium
(c) Sodium
Show Answer

Hydrogen


12. The Group 2 of periodic table is composed of
(a) Non-Metals
(b) Metalloids
(c) metals
Show Answer

metals


13. Group 3 of periodic table is all composed of metals except
(a) Boron
(b) Indium
(c) Gallium
Show Answer

Boron


14. In Group 4 of periodic table
(a) All metals
(b) Tin and lead
(c) All non-metal
Show Answer

Tin and lead


15. Which of the following are metals in group 5?
(a) Antimony
(b) Bismuth
(c) Nitrogen
(d) Both (a) & (b)
Show Answer

Both (a) & (b)


16. All the members of group 6 in periodic table is _____
(a) Non-metals
(b) Metalloids
(c) metals
(d)
Show Answer

Non-metals


17. All the members of group of 7 in periodic tables is ________
(a) Non-metals
(b) Metalloids
(c) metals
Show Answer

Non-metals


18. All the elements present in D-Block of periodic table are
(a) Non-metals
(b) Metalloids
(c) metals
Show Answer

metals


19. All the elements present in lanthanide and actinide series are _____
(a) Non-metals
(b) Metalloids
(c) metals
Show Answer

metals


20. The tendency of an element to lose electrons and form cations is called _____ character.
(a) Electronegative
(b) Electropositive
(c) sublimation
Show Answer

Electropositive


21. A more electropositive element has _____ metallic character.
(a) More
(b) Constant
(c) less
Show Answer

More


22. Na \quad \longrightarrow Na^+ + ________.
(a) 4es^-
(b) 3es^-
(c) 2es^-
(d) 1e^-
Show Answer

1e^-


23. Ca \quad \longrightarrow Ca^{+2} + ___________.
(a) 4es^-
(b) 3es^-
(c) 2es^-
(d) 1e^-
Show Answer

2es^-


24. The elements having lower ____________ have higher electro positivity.
(a) Ionization energy
(b) Electron affinity
(c) Electro negativity
Show Answer

Ionization energy


25. Which metals are most electropositive in nature?
(a) Halogens
(b) Alkaline earth metals
(c) Alkali metals
Show Answer

Alkali metals


26. Non-Metals have the ability to _____ electrons in their valance shall to form anions.
(a) Accept
(b) Share
(c) donate
Show Answer

Accept


27. F + ____________ \quad \longrightarrow F^-
(a) 1e^-
(b) 2es^-
(c) 3es^-
(d) 4es^-
Show Answer

1e^-


28. O + ________ \quad \longrightarrow O^{-2}
(a) 1e^-
(b) 2es^-
(c) 3es^-
(d) 4es^-
Show Answer

2es^-


29. Metallic character decreases across a period from _______.
(a) Right to left
(b) Top to bottom
(c) Left to right
Show Answer

Left to right


30. Non-metallic character increases with increases in _______ across a period.
(a) Atomic number
(b) Mass number
(c) Molarity
Show Answer

Atomic number


31. In a group from top to bottom the metallic character
(a) Decreases
(b) Increases
(c) Constant
Show Answer

Increases


32. The elements of group IA except hydrogen are ______.
(a) alkali metals
(b) Alkaline earth metals
(c) Halogens
Show Answer

alkali metals


33. The word alkali is an Arabic word which means. _________
(a) Rock Dangerous
(c) Ashes
Show Answer

Ashes


34. How many electrons does alkali meal have in their valence shall ?
(a) 4es^-
(b) 3es^-
(c) 2es^-
(d) 1e^-
Show Answer

1e^-


35. The alkali metals are highly _________ elements
(a) Electronegative
(b) Electropositive
(c) Coordinative
Show Answer

Electropositive


36. Alkali metals lose their one valance electron and form ________ ions.
(a) Mono positive
(b) Bi positive
(c) Tri positive
Show Answer

Mono positive


37. The ionization energy of alkali metals are ____
(a) High
(b) Moderate
(c) low
Show Answer

low


38. Alkali metals form ______ compounds with group VI, VII
(a) Covalent
(b) ionic
(c) Metallic
Show Answer

ionic


39. Alkali metals are very reactive, that is why they do not occur in _____ state.
(a) Free
(b) Combine
(c) molecular
Show Answer

Free


40 Sodium and potassium are abundantly ____ found on the earth crust.
(a) 4.2 %
(b) 2.4 %
(c) 1.24 %
Show Answer

2.4 %


41. Which element is not found in nature rather prepared in the laboratory?
(a) Sodium
(b) Lithium
(c) Francium
Show Answer

Francium


42. The elements of group II A are called ________ metals.
(a) Alkaline earth
(b) Alkali
(c) noble
Show Answer

Alkaline earth


43. The alkaline earth metals have ______ electrons in their valance shall
(a) 1
(b) 2
(c) 3
(d) 4
Show Answer

2


44. Alkaline earth metals are _______ in nature
(a) Electropositive
(b) Fundamental
(c) electronegative
Show Answer

Electropositive


45. Alkaline earth metals lose two valance electrons and form _____ ions.
(a) M^{+4}
(b) M^{+3}
(c) M^{+2}
(d) M^{+1}
Show Answer

M^{+2}


46. There are _____ alkaline earth metals.
(a) 5
(b) 6
(c) 4
(d) 8
Show Answer

6


47. Alkaline earth metals are found in the form of _________
(a) Sulphates
(b) Carbonates
(c) Nitrates
Show Answer

Sulphates


48. _______ occurs in nature in small amount in the form of Beryl.
(a) Calcium
(b) Magnesium
(c) Beryllium
Show Answer

Beryllium


49. Magnesium halides are found in _______
(a) Rocks
(b) Sea Water
(c) Mud
Show Answer

Sea Water


50. Calcium occurs as skeletal material in _________
(a) Bones
(b) Teeth
(c) Egg Shell
(d) All of them
Show Answer

All of them


51. Which element has highest ionization energy?
(a) Lithium
(b) Sodium
(c) Potassium
(d) Rubidium
Show Answer

Lithium


52. Moving from alkali to alkaline earth metals, the melting and boiling points, densities and hardness _______.
(a) Increases
(b) Constant
(c) Decreases
Show Answer

Increases


53. Sodium does not occur in _____ state in nature because it is too reactive and readily combines with other elements.
(a) Combined
(b) Molecular
(c) Free
(d) None of these
Show Answer

Free


54. Sodium is found in sea as ____________
(a) Na CI
(b) NaBr
(c) NaI
(d) All of them
Show Answer

All of them


55. When freshly cut, alkali metals shows as shiny and _______ surface that rapidly tarnishes in air.
(a) Reddish
(b) Silvery
(c) Neon Green
Show Answer

Silvery


56. Sodium atom belongs to _________.
(a) Group I
(b) Group II
(c) Group III
Show Answer

Group I


57. The atomic number of sodium is _____ and its symbol is “Na”
(a) 17
(b) 11
(c) 21
(d) 29
Show Answer

11


58. Sodium element is a ________ metal.
(a) Hard
(b) Wax like
(c) soft
Show Answer

soft


59. The melting point of sodium is ________
(a) 97.6 {}^oC
(b) 69.7{}^oC
(c) 76.9 {}^oC
Show Answer

97.6 {}^oC


60 The boiling point of Sodium is
(a) 880 {}^oC
(b) 900 {}^oC
(c) 920 {}^oC
Show Answer

880 {}^oC


61 Sodium is a _______ conductor of heat and electricity.
(a) Bad
(b) Good
(c) Both
Show Answer

Good


62. Sodium carbonate, sodium bicarbonate, sodium hydroxide and sodamide etc. can be prepared with the help of _______.
(a) Potassium
(b) Silver
(c) Sodium
Show Answer

Sodium


63. Sodium form alloy with mercury called _______.
(a) Sodium amalgam
(b) Mercurous sodium
(c) Botanical liquid
Show Answer

Sodium amalgam


64. Magnesium is the member of ______ metals.
(a) Alkali
(b) Alkaline
(c) Halogens
Show Answer

Alkaline


65. The dolomite, kieserite and Epsom salt are the combined forms of ________.
(a) Beryllium
(b) Calcium
(c) Magnesium
Show Answer

Magnesium


66. Magnesium is present in sea water as _________.
(a) Chlorides
(b) Bromides
(c) Silicates
(d) Both a and b
Show Answer

Both a and b


67. Magnesium is responsible for permanent _______ of water.
(a) Hardness
(b) Ionization
(c) Stability
Show Answer

Hardness


68. Magnesium is essential constituent of ________ in plants.
(a) Xylem
(b) Mesophyll
(c) Chlorophyll
Show Answer

Chlorophyll


69. The atomic number of magnesium is ________.
(a) 16
(b) 12
(c) 18
(d) 24
Show Answer


70. Magnesium occupy _______ electronic shells.
(a) 3
(b) 4
(c) 5
(d) 6
Show Answer

3


71. Magnesium has a silvery grey ________ appearance.
(a) Gaseous
(b) Solid
(c) Liquid
Show Answer

Solid


72. Magnesium has a melting point of ________.
(a) 651 {}^oC
(b) 156 {}^oC
(c) 561 {}^oC
Show Answer

651 {}^oC


73. The boiling point of Magnesium is ________
(a) 210 {}^6oC
(b) 1062 {}^oC
(c) 1106 {}^oC
Show Answer

1106 {}^oC


74. Magnesium has __________ characteristics.
(a) Malleable
(b) Ductile
(c) Good Conductor
(d) All of them
Show Answer

All of them


75. The main ingredient in calcium carbonate, lime stone, marble etc is _______.
(a) Calcium
(b) Sulphur
(c) Silver
Show Answer

Calcium


76. The atomic number of calcium is ________.
(a) 05
(b) 10
(c) 15
(d) 20
Show Answer


77. Calcium has ________ valance electrons.
(a) 2
(b) 4
(c) 6
(d) 8
Show Answer

2


78. The melting point of calcium is ______.
(a) 158 {}^oC
(b) 851 {}^oC
(c) 518 {}^oC
Show Answer

851 {}^oC


79. The boiling point of calcium is ______.
(a) 1487 {}^oC
(b) 1484 {}^oC
(c) 1490 {}^oC
(d) 1493 {}^oC
Show Answer

1487 {}^oC


80. _______ is a mixture of Aluminum, copper, magnesium and manganese.
(a) Magnesium
(b) Duralumin
(c) Amalgam
Show Answer

Duralumin


81. The metals present in group I and II are _______, very reactive, very electropositive is called soft metals.
(a) Soft
(b) Hard
(c) Wax like
Show Answer

Soft


82. Iron is a transition element, with atomic number ______.
(a) 56
(b) 26
(c) 46
(d) 36
Show Answer

26


83. _________. Metals are those metals which resists oxidation and corrosion in moist air.
(a) Carbon family
(b) Lanthanide
(c) Noble
Show Answer

Noble


84. Noble metals are relatively inert and found _______ in nature.
(a) Free
(b) Combined
(c) Complex
Show Answer

Free


85. ________ is used to make ornamental objects and jeweler for thousands of years.
(a) Lithium
(b) Bronze
(c) Gold
(d) Aluminum
Show Answer

Gold


86. We alloy gold with other metals such as ________.
(a) Copper
(b) Silver
(c) Platinum
(d) All of them
Show Answer

All of them


87. ________ are those substances which are non-conductors of heat and electricity.
(a) Metals
(b) Non-metals
(c) Metalloids
(d)
Show Answer

Non-metals


88. The oxides and hydroxides of non-metals are _______.
(a) Acids
(b) Bases
(c) Salts
Show Answer

Acids


89. Non-metals exists in ______ states of matter at room temperature.
(a) 1
(b) 2
(c) 3
(d) 4
Show Answer

3


90. Non metal is an element which gains an electron and form _______.
(a) Anion
(b) Cation
(c) Radical
Show Answer

Anion


91. All non-metallic elements have the ability to gain electrons from other elements, hence they are ______ in nature.
(a) Electronegative
(b) Electropositive
(c) Allotropic
Show Answer

Electronegative


92. Group VIII elements are called _______.
(a) Noble gases
(b) Halogens
(c) Carbon family
Show Answer

Halogens


93. The word halogen is derived from a Greek word which means ________.
(a) Salt forming
(b) Burning
(c) Ashes
Show Answer

Salt forming


94. Halogens are ________.
(a) Metals
(b) Metalloids
(c) Non-Metals
Show Answer

Non-Metals


95. At room temperature, fluorine and chlorine are ______
(a) Gases
(b) Liquid
(c) Solid
(d) Plasma
Show Answer

Gases


96. Bromine is a __________.
(a) Gas
(b) Liquid
(c) Solid
Show Answer

Liquid


97. Iodine and astatine are _________.
(a) Gases
(b) Liquids
(c) Solids
Show Answer

Solids


98. A reaction in which more reactive halogen will displace a less reactive halogen from its halide solution is called ________ reaction.
(a) Displacement
(b) Oxidation
(c) Reduction
Show Answer

Displacement


99. Bromine is a non-metal in:
(a) Solid State
(b) Liquid State
(c) Gaseous State
(d) Plasma State
Show Answer

Liquid State


100. Halogens react with metals to form:
(a) Halides
(b) Oxides
(c) Halogen sapphires
(d) Hydrogenated compounds
Show Answer

Halides


101. Alkali metals are:
(a) Oxidizing agents
(b) Dehydrating agents
(c) Reducing agents
(d) All the them
Show Answer

Oxidizing agents


102. Among the alkali metals, the metal with the highest ionization potential is:
(a) Na
(b) Li
(c) Rb
(d) Cs
Show Answer

Li


103. The halogen present in the solid form is:
(a) Chlorine
(b) Fluorine
(c) Iodine
(d) Bromine
Show Answer

Iodine


104. Tendency of a metal to lose electron is called:
(a) Electronegativity
(b) Electro positivity
(c) Electroplating
(d) Electrolysis
Show Answer

Electro positivity


105. The word alkali means:
(a) Base
(b) Basic salt
(c) Acid
(d) Ashes
Show Answer

Ashes


106. The oxide of calcium CaO is:
(a) Acidic
(b) Basic
(c) Amphoteric
(d) Neutral
Show Answer

Basic


107. Which of the following is not an alkali metal:
(a) Francium
(b) Cesium
(c) Rubidium
(d) Radium
Show Answer

Radium


108. Group II elements are named as Alkaline Earth Metals because:
(a) Their Oxides are basic
(b) Their oxide and hydroxides are water soluble
(c) Both A and B
(d) They are found in earth
Show Answer

They are found in earth

Review Exercise Chapter 8

96. Bromine is a __________.
(a) Gas
(b) Liquid
(c) Solid
Show Answer

Liquid


97. Iodine and astatine are _________.
(a) Gases
(b) Liquids
(c) Solids
Show Answer

Solids


98. A reaction in which more reactive halogen will displace a less reactive halogen from its halide solution is called ________ reaction.
(a) Displacement
(b) Oxidation
(c) Reduction
Show Answer

Displacement


99. Bromine is a non-metal in:
(a) Solid State
(b) Liquid State
(c) Gaseous State
(d) Plasma State
Show Answer

Liquid State


100. Halogens react with metals to form:
(a) Halides
(b) Oxides
(c) Halogen sapphires
(d) Hydrogenated compounds
Show Answer

Halides


101. Alkali metals are:
(a) Oxidizing agents
(b) Dehydrating agents
(c) Reducing agents
(d) All the them
Show Answer

Oxidizing agents


102. Among the alkali metals, the metal with the highest ionization potential is:
(a) Na
(b) Li
(c) Rb
(d) Cs
Show Answer

Li


103. The halogen present in the solid form is:
(a) Chlorine
(b) Fluorine
(c) Iodine
(d) Bromine
Show Answer

Iodine


104. Tendency of a metal to lose electron is called:
(a) Electronegativity
(b) Electro positivity
(c) Electroplating
(d) Electrolysis
Show Answer

Electro positivity


105. The word alkali means:
(a) Base
(b) Basic salt
(c) Acid
(d) Ashes
Show Answer

Ashes


106. The oxide of calcium CaO is:
(a) Acidic
(b) Basic
(c) Amphoteric
(d) Neutral
Show Answer

Basic


107. Which of the following is not an alkali metal:
(a) Francium
(b) Cesium
(c) Rubidium
(d) Radium
Show Answer

Radium


108. Group II elements are named as Alkaline Earth Metals because:
(a) Their Oxides are basic
(b) Their oxide and hydroxides are water soluble
(c) Both A and B
(d) They are found in earth
Show Answer

They are found in earth

Chemistry Class 9 MCQs (All Chapters)


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jawad khalil

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