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Chemistry Class 9 Chapter 1


Updated: 03 Sep 2023

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Chemistry Class 9 Chapter 1 serves as the stepping stone for students entering the world of chemistry. It introduces fundamental concepts like matter classification, Elements, Compounds, Mixture, and Chemical Formulas. These concepts are essential for understanding the basics of the world of chemistry.

Chemistry Class 9 Chapter 1 Notes

Chemistry 9th Class Chapter 1

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Chemistry Class 9 Chapter 1

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Chemistry Class 9 Chapter 1 SLO Questions

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Chemistry Class 9 Chapter 1-MCQs

Fundamental of Chemistry

1. The complete study of__________ is called matter.
(a) Matter
(b) Energy
(c) Frequency
(d) None of these
Show Answer

Matter


2. We all depend upon different ___________ , Which are necessary for our survival.
(a) Crucibles
(b) Chemicals
(c) Isotopes
(d) None of these
Show Answer

Chemicals


3. Chemistry has a wide range of _______________ which is serving the humanity.
(a) Applications
(b) Properties
(c) Techniques
(d) None of these
Show Answer

Applications


4. Petrochemicals, medicines, drugs, papers, soap, detergents, paints, colour, pigments etc are the inventions of ________________.
(a) Biology
(b) Physics
(c) Chemistry
(d) None of these
Show Answer

Chemistry


5. The study of chemistry also provides knowledge and techniques to improve our __________________.
(a) Stamina
(b) Appearance
(c) Health
(d) None of these
Show Answer

Health


6. The Study of chemistry also helps us to explore and conserve the _____________resources.
(a) Artificial
(b) Natural
(c) Coilateral
(d) None of these
Show Answer

Natural


Muslim Scientists

7. The Muslim period in science of chemistry was about _____________ years.
(a) 1000
(b) 800
(c) 1200
(d) None of these
Show Answer

1000


8. The Egyptians, the Greeks and the ____________ contributed much to the science of chemistry.
(a) Muslims
(b) Babylonians
(c) Jews
(d) None of these
Show Answer

Muslims


9. In this period, Muslim scientist focused on finding ways to change base metal such as Lead into______________.
(a) Mercury
(b) Gold
(c) Bronze
(d) None of these
Show Answer

Gold


10. Muslim scientist discovered ___________ elements like arsenic, antimony and bismuth etc.
(a) Few
(b) many
(c) five
(d) None of these
Show Answer

many


11. Many new chemicals processes were also introduced by Muslim scientists such as filtration, fermentation and ________etc.
(a) Ultra sonication
(b) Sedimentation
(c) Distillation
(d) None of these
Show Answer

Distillation


12. The Period of Muslims is generally called the period of ___________ in the history of chemistry.
(a) Al-Chemists
(b) Elites
(c) Masters
(d) None of these
Show Answer

Al-Chemists


13. _________ is generally known as the “Father of chemistry”.
(a) Jabber Bin Haiyan
(b) Ibn-e-Sina
(c) Al-Beruni
(d) None of these
Show Answer

Jabber Bin Haiyan


14. Who was the first scientist who has well- established laboratory?
(a) Zakriya Al Razi
(b) Jabber Ibn Haiyan
(c) Al Beruni
(d) None of these
Show Answer

Jabber IbnHaiyan


15. Jabber bin Haiyan was the first to prepare.
(a) HCl
(b) HNO_3
(c) H_2SO_4
(d) All of them
Show Answer

All of them


16. Jabber Bin Haiyan was also known as ______ in the Europe.
(a) Geber
(b) Ibn-e-Sina
(c) Al-Razi
(d) None of these
Show Answer

Geber


17. Jabber Bin Haiyan’s Demise occur in ____________.
(a) 721 A.D
(b) 803 A.D
(c) 803 B.C
(d) None of these
Show Answer

803 A.D


18. Al-Razi wrote ________ books.
(a) 26
(b) 16
(c) 25
(d) 20
Show Answer

26


19. The most famous book of Al-Razi was _______________.
(a) Khayaban
(b) Mindeel
(c) Al-Asrar
(d) None of these
Show Answer

Al-Asrar


20. Al-Razi was the first scientist / Chemist to divide the chemical ________into four types .
(a) Isotopes
(b) Compound
(c) Solution
(d) None of these
Show Answer

Compound


21. Al-Razi prepared alcohol by ________.
(a) Fermentation
(b) Coagulation
(c) Filtration
(d) None of these
Show Answer

Fermentation


22. Al-Beruni was born in 973 AD and died in ______________.
(a) 1024 AD
(b) 1048 A.D
(c) 1072 AD
(d) None of these
Show Answer

1048 A.D


23. Al-Beruni was the first chemist who determined the ________ of different substances.
(a) Frequencies
(b) Chemical Formula
(c) Densities
(d) None of these
Show Answer

Densities


24. Ibn-e-Sina was born in ___________ and died in 1037 A.D.
(a) 980 AD
(b) 980 B.C
(c) 985 A.D
(d) None of these
Show Answer

980 AD


25. Ibn-e-Sina is generally known as the __________ of the Muslim’s world.
(a) Maximus
(b) Alexander
(c) Aristotle
(d) None of these
Show Answer

Aristotle


26. Ibn-e-Sina was the first one who rejected the idea that base metals can be converted into _____.
(a) Silver
(b) Gold
(c) Neon
(d) None of these
Show Answer

Gold


27. Ibn-e-Sina has written more than ________ books that are now taught in the Europe.
(a) 100
(b) 101
(c) 95
(d) None of these
Show Answer

100


To Download Complete Notes of Class 9 Chemistry Notes, Click the link.

Definition of Chemistry

Branches of Chemistry

28. Chemistry is the branch of ____________ science which includes the study of material and substances.
(a) Chemical
(b) Physical
(c) Historical
(d) None of these
Show Answer

Physical


29. ___________ Chemistry deal with the relationship between physical properties of substances along with chemical changes in them.
(a) Organic
(b) Inorganic
(c) Physical
(d) None of these
Show Answer

Physical


30. Hydrocarbon contains ________ elements only.
(a) C and H
(b) C,H,O
(c) C and O
(d) None of these
Show Answer

C and H


31. The study of ________ and their derivatives are called organic chemistry.
(a) Hydrocarbons
(b) Isotopes
(c) Chemical species
(d) None of these
Show Answer

Hydrocarbons


32. Inorganic chemistry deals with all kind of elements and compounds, EXCEPT _________ and their derivatives.
(a) Organic compounds
(b) Chemical Compounds
(c) Biochemical
(d)
Show Answer

Organic compounds


33. Analytical chemistry deals with qualitative and quantitative analysis of __________.
(a) Energy
(b) Quarks
(c) matter
(d) None of these
Show Answer

matter


34. ___________ Chemistry deals with the study of techniques and chemical processes for the preparation of different industrial products.
(a) Environmental
(b) Industrial
(c) Nuclear
(d) None of these
Show Answer

Industrial


35. Nuclear Chemistry concerned with the study of ____________, changes occurring in it and its properties.
(a) Nucleus
(b) Sub atomic particles
(c) Composition
(d) None of these
Show Answer

Nucleus


36. Biochemistry deals with the study of synthesis, composition, decomposition and chemical reaction of ______ factors.
(a) Abiotic
(b) Biotic
(c) Both a and b
(d) None of these
Show Answer

Biotic


Elements

Symbols of Elements

37. Anything that occupies space and having a mass is called ________________.
(a) Matter
(b) Mixture
(c) Substance
(d) None of these
Show Answer

Matter


38. Everything in the ________ is made of matter.
(a) Earth
(b) Mars
(c) Universe
(d) None of these
Show Answer

Universe


39. A piece of matter in _________ form is substance.
(a) Impure
(b) Pure
(c) Both a and b.
(d) None of these
Show Answer

Pure


40 Pure water is an example of a ____________.
(a) Substance
(b) Element
(c) Compound
(d) None of these
Show Answer

Substance


41. Element is a pure substance which cannot be _______ into other simpler substances by any physical or chemical process.
(a) Split up
(b) Combined up
(c) None
(d) All of These
Show Answer

Split up


42. The fundamental unit of an element is ______________.
(a) atom
(b) Electron
(c) Proton
(d) None of these
Show Answer

atom


43. Scientists have discovered about _____ elements.
(a) 108
(b) 118
(c) 128
(d) None of these
Show Answer

118


44. There are __________ naturally occurring elements
(a) 92
(b) 94
(c) 96
(d) None of these
Show Answer

92


45. There are __________ artificial elements.
(a) 28
(b) 27
(c) 26
(d) None of these
Show Answer

26


46. Each element consists of ________kind of atoms.
(a) different
(b) Same
(c) None
(d) All of these
Show Answer

Same


47. In 1814, ____________ suggested the system for representing element with symbol.
(a) Berzelius
(b) Max Plank
(c) Maximus
(d) None of these
Show Answer

Berzelius


48. The shortest name of an element is called __________.
(a) Representation
(b) Isotopes
(c) symbol
(d) None of these
Show Answer

symbol


49. B, C, F are the symbols of __________________.
(a) Compounds
(b) Elements
(c) Molecules
(d) None of these
Show Answer

Elements


Compounds

50. Compound is a pure substance consists of two or more _________ types of elements chemically combined together in a fixed ratio by mass.
(a) Different
(b) Same
(c) Both a and b
(d) None of these
Show Answer

Different


51. In the formation of a compound, the element must undergo __________changes.
(a) Physical
(b) Analytical
(c) Chemical
(d) None of these
Show Answer

Chemical


52. In water (H_2O) molecule, the ratio of Hydrogen and oxygen is ____________.
(a) 1:2
(b) 2:1
(c) 2:2
(d) 1:1
Show Answer

2:1


53. A compound is always represented by ___________.
(a) Chemical formula
(b) Physical Formula
(c) None
(d) All of These
Show Answer

Chemical formula


Mixture

Types of Mixture

54. A _________ is made up of two or more substances that are not chemically combined.
(a) Compound
(b) Mixture
(c) Element
(d) None of these
Show Answer

Mixture


55. The components of a mixture are not in a fixed __________.
(a) Ratio
(b) Composition
(c) Pattern
(d) None of these
Show Answer

Ratio


56. Mixture can be separated by _______methods.
(a) Physical
(b) Analytical
(c) Chemical
(d) None of these
Show Answer

Physical


57. A homogenous mixture is one which has uniform __________ throughout its mass.
(a) Properties
(b) structure
(c) Composition
(d) None of these
Show Answer

Composition


58. Example of homogenous mixture is the solution of salt (NaCl) and ______________.
(a) Benzene
(b) Water
(c) chloroform
(d) None of these
Show Answer

Water


59. A hetrogenous mixture is one which does not have _________composition throughout its mass.
(a) Uniform
(b) Semi Uniform
(c) Unformal
(d) None of these
Show Answer

Uniform


60 Salad, dirt, sand and water etc are the example of ___________________.
(a) Homogenous mixture
(b) Compound
(c) Heterogeneous mixture
(d) None of these
Show Answer

Heterogeneous mixture


61 The _______ of a compound is sharp and fixed.
(a) Freezing point
(b) Melting point
(c) Boiling point
(d) None of these
Show Answer

Melting point


62. ____________ do not have sharp and fixed melting point.
(a) Mixture
(b) Molecules
(c) Isotopes
(d) None of these
Show Answer

Mixture


63. When iron (Fe) and Sulphur (s) is strongly heated, it react with each other to form a compound.
(a) FeS
(b) Fe_2S
(c) FeS_2
(d) Fe_2S_2
Show Answer

FeS


Atomic Number and Mass Number

64. The number of ______________ present in the nucleus of an atom of an element is called atomic number .
(a) Neutrons
(b) Electrons
(c) Protons
(d) None of these
Show Answer

Protons


65. An atom is electrically _______, because they have same number of electrons and protons.
(a) Cationic
(b) Neutral
(c) Anionic
(d) None of these
Show Answer

Neutral


66. Elements are arranged in periodic table on the basis of number of ___________.
(a) Protons
(b) Quarks
(c) Electrons
(d) None of these
Show Answer

Protons


67. Atomic number is represented by _____________.
(a) z
(b) Z
(c) a
(d) A
Show Answer

Z


68. The atomic number of carbon ( C ) is ______________.
(a) 5
(b) 7
(c) 6
(d) 8
Show Answer

6


69. Mass number is also called ____________number.
(a) Nucleon
(b) Neutron
(c) None
(d) All of these
Show Answer

Nucleon


70. The sum of number of protons and neutrons present in __________ of an atom is called mass number.
(a) Orbits
(b) Atom
(c) Nucleus
(d) None of these
Show Answer

Nucleus


71. Mass number is represented by _________________.
(a) a
(b) z
(c) A
(d) Z
Show Answer

A


72. The mass number of carbon (C) atom is _______________.
(a) 12
(b) 2
(c) 22
(d) 18
Show Answer

12


73. Electrons, protons and neutrons are collectively called as _________.
(a) Charges
(b) Unit
(c) Subatomic particle
(d) None of these
Show Answer

Subatomic particle


Relative Atomic MassAtomic Mass Unit

74. Relative atomic mass is the mass of an atom of an element relative to the mass of 1/12 of the mass of _________.
(a) C-12
(b) C-13
(c) C-14
(d) None of these
Show Answer

C-12


75. The atomic weight of C-12 is 12g which equal to ___________.
(a) 12 mol
(b) 1 mol
(c) 6.022 mol
(d) None of these
Show Answer

1 mol


76. 1 mol of C-12 contain ______atoms.
(a) 6.023 \times 10^{23}
(b) 1.09 \times 10^{-11}
(c) 6.023 \times 10^{-23}
(d) None of these
Show Answer

6.023 \times 10^{23}


77. Average atomic mass is the weighted average of the atomic masses of the naturally occurring ____________ of an element.
(a) Charges
(b) Isotopes
(c) Atomic Number
(d) None of these
Show Answer

Isotopes


Chemical Formula

78. An abbreviation used for the full name of a compound with the help of __________ is called chemical formula.
(a) Pattern
(b) Brails
(c) Symbols
(d) None of these
Show Answer

Symbols


79. The formula tells us the type of atoms and ______ of the different atoms present in the compound.
(a) Ratio
(b) Atomic number
(c) Density
(d) None of these
Show Answer

Ratio


80. The simplest formula which shows the _________ whole number ratio of the atoms of different elements present in a compound is called empirical formula.
(a) Largest
(b) Smallest
(c) Average
(d) None of these
Show Answer

Smallest


81. The empirical formula for benzene (C_6H_6) is:
(a) CH_2
(b) C_2H
(c) C_2H_2
(d) CH
Show Answer

CH


82. The molecular formula shows the _________numbers of atoms of different elements present in one molecule of a compound.
(a) Approximate
(b) Whole
(c) actual
(d) None of these
Show Answer

actual


83. The smallest repeating unit of an ____________ compound showing the simple reaction between the ions is called formula unit.
(a) Ionic
(b) Covalent
(c) Metallic
(d) None of these
Show Answer

Ionic


Molecular Mass

84. The __________ of the relative atomic masses of all the atoms present in the molecule is called molecular Mass.
(a) Subtraction
(b) Product
(c) Sum
(d) None of these
Show Answer

Sum


85. The sum of the atomic masses of __________ present in the formula unit of an ionic compound is called formula mas.
(a) Ions
(b) Isotopes
(c) atoms
(d) None of these
Show Answer

Ions


Chemical SpeciesIonMolecular IonFree RadicalMolecule

86. The atoms, molecules, ions etc that __________ in a chemical reaction is called chemical specie.
(a) Violate
(b) Hinder
(c) Take part
(d) None of these
Show Answer

Take part


87. The particle that carries an electrical charge, positive or negative due to the loss or gain of one or more _____ is called an ion.
(a) Protons
(b) Electrons
(c) Neutrons
(d) None of these
Show Answer

Electrons


88. The positively charged specie is called ____________.
(a) Cation
(b) Free radical
(c) atom
(d) None of these
Show Answer

Cation


89. The negatively charged specie is called ___________________.
(a) Free radical
(b) Cation
(c) Anion
(d) None of these
Show Answer

Anion


90. The atom or group of atoms that has an __________ electron in an outer shell with no charge is called free radical.
(a) Unpaired
(b) Odd
(c) Both a and b
(d) None of these
Show Answer

Both a and b


91. A molecule is formed by ________ combination of atom.
(a) Chemical
(b) Physical
(c) Electrical
(d) None of these
Show Answer

Chemical


92. Di-atomic molecules consist of _________ atoms i.e H_2 .
(a) 4
(b) 3
(c) 5
(d) 2
Show Answer

2


93. The ___________ are very big and large.
(a) Monoatomic
(b) Macro molecules
(c) Micro molecules
(d) None of these
Show Answer

Macro molecules


94. _____________ is a macromolecule found in blood.
(a) Haemoglobin
(b) H_2O
(c) HCl
(d) None of these
Show Answer

Hemoglobin


Avogadro’s NumberMole

95. Avogadro’s number is the collection of __________ particles.
(a) 1.0 \times 10^{-11}
(b) 6.023 \times 10^{23}
(c) 3 \times 10^8
(d) None of these
Show Answer

6.023 \times 10^{23}


96. The amount of a substance which contains ____________ number is called mole.
(a) Avogadro’s
(b) Mass number
(c) Formula
(d) None of these
Show Answer

Avogadro’s


97. Mole is represented by _________________.
(a) NA
(b) mol
(c) amu
(d) None of these
Show Answer

mol


98. Which one of the following can be broken into simpler substances.
(a) Ammonia
(b) Oxygen
(c) Sulphur
(d) None of these
Show Answer

Ammonia


99. The gram molecular mass of HNO_3 is .
(a) 60
(b) 100
(c) 63
(d) None of these
Show Answer

63


100. Which one is the example of triatomic molecule?
(a) O_2
(b) CO_2
(c) CH_4
(d) None of these
Show Answer

CO_2


101. Which of the following is a homogenous mixture?
(a) Smoke
(b) air
(c) Fog
(d) Smog
Show Answer

air


Chemistry Class 9 MCQs (All Chapters)


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