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Chemistry Class 10 Chapter 3


Updated: 13 Dec 2023

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Chemistry Class 10 Chapter 3 introduces the concept of “Organic Chemistry”. This is mainly chapter No. 11, “Organic Chemistry”, of the book of Class 10.
This article consists of Notes, SLO Based Notes and MCQs of chemistry, which cover your course, board papers and clear your chemistry concept for different types of tests.

Chemistry Class 10 Chapter 3 Notes

Organic Chemistry

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Chemistry Class 10 Chapter No. 11 Notes

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SLO Based Questions

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Chemistry Class 10 Chapter No. 11 SLO Questions

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Chemistry Class 10 Chapter 3 MCQs

1. Organic compounds were defined earlier as “compounds that are derived from _________
(a) Living things
(b) Non-living things
(c) Microorganism
(d) None of these
Show Answer

Living things


2. Vital force theory was presented by :
(a) Nicols
(b) Thornton
(c) Berzellius
(d) None of these
Show Answer

Berzellius


3. Berzellius presented vital force theory in :
(a) 1915
(b) 1815
(c) 1916
(d) 1816
Show Answer

1815


4. According to this theory, vital forces are necessary for the synthesis of ______ compounds.
(a) Organic
(b) Inorganic
(c) Biochemical
(d) None of these
Show Answer

Organic


5. The use of organic compound in daily life is :
(a) No use
(b) Minimal
(c) Maximum
(d) None of these
Show Answer

Maximum

To Download Complete Notes of Chemistry Notes 10 Class, Click on the given link.

6. Organic compound are used in :
(a) Food
(b) Clothes
(c) Gas
(d) All of them
Show Answer

All of them


7. Organic chemistry is the study of _________
(a) Carbon
(b) Hydrogen
(c) None
(d) None of these
Show Answer

Carbon


8. Oxides of carbon, carbonates, bicarbonate and carbides are _________ in organic chemistry.
(a) Included .
(b) Not included
(c) May be
(d) None of these
Show Answer

Not included


9. The study of ________ and their derivatives is called organic chemistry
(a) Hydrocarbons
(b) Lanthanides
(c) Alkali metal
(d) None of these
Show Answer

Hydrocarbons


10. The first organic compound prepared in laboratory is ________
(a) Ammonia
(b) Acetic acid
(c) Urea
(d) None of these
Show Answer

Urea


11. There are ______ of organic compounds present today.
(a) Thousands
(b) Millions
(c) Billions
(d) None of these
Show Answer

Millions


12. Organic compounds that contain _______ only are called hydrocarbon.
(a) C and H
(b) C , H and N
(c) Carbon only
(d) None of these
Show Answer

C and H


13. Organic compound are of _____ types depending upon their origion.
(a) 5
(b) 3
(c) 2
(d) 10
Show Answer

2


14. All are the synthetic organic compounds EXCEPT :
(a) Plastic
(b) Coal
(c) Detergents
(d) Medicines
Show Answer

Coal


15. Coal and food we eat are the _______ compounds.
(a) Naturally occurring
(b) synthetic
(c) Semi synthetic
(d) None of these
Show Answer

Naturally occurring


16. Organic compounds can be represented by ________ different formulas.
(a) 02
(b) 03
(c) 04
(d) 05
Show Answer

04


17. Carbon atom has a valance of four and it forms four ______ bonds.
(a) Covalent
(b) Metallic
(c) Coordinate covalent
(d) None of these
Show Answer

Covalent


18. The formula which represents ____ of atoms in one molecule of organic compound is called molecular formula
(a) Actual ratio
(b) Actual number
(c) Empirical number
(d) None of these
Show Answer

Actual number


19. The molecular formula of propane is :
(a) C_3 H_6
(b) C_6 H_3
(c) C_3 H_8
(d) C_4 H_{10}
Show Answer

C_3 H_8


20. The _____ of different atoms of various elements around the carbon atoms present in a molecule of a compound is called structural formula.
(a) arrangement
(b) Distribution
(c) Verification
(d) None of these
Show Answer

arrangement


21. ______ are represented by a single line (-)
(a) Triple
(b) Double
(c) Single
(d) None of these
Show Answer

Single


22. Double bonds are represented by _______
(a) -
(b) =
(c) \equiv
(d) None of these
Show Answer

=


23. The formula where the groups of atoms are shown in order with no bonds is called ______ formula.
(a) Condensed
(b) structural
(c) Molecular
(d) None of these
Show Answer

Condensed


24. The condensed formula of pentane is :
(a) C_5H_{12}
(b) CH_3(CH_2)_3CH_3
(c) CH_3 (CH_2)_2 CH_3
(d) None of these
Show Answer

CH_3(CH_2)_3CH_3


25. A formula in which electrons are shown as dots and cross between various atoms in one molecule of a compound is called _________ formula.
(a) Condensed
(b) Structural
(c) Dot and Cross
(d) None of these
Show Answer

Dot and Cross


26. The general formula for alkanes is :
(a) C_n H_{2n+2}
(b) C_n H_{2n}
(c) C_n H_{2n-2}
(d) None of these
Show Answer

C_n H_{2n+2}


27. The organic compound in which carbon atoms are in________ skeleton is called open chain organic compound
(a) Cyclic chain
(b) Aromatic
(c) Open chain
(d) None of these
Show Answer

Open chain


28. Open chain organic compounds are also called :
(a) Alicyclic
(b) Acyclic
(c) Cyclic
(d) None of these
Show Answer

Acyclic


29. The organic compounds in which carbon atom link with each other to form straight chains are called ______ organic compounds.
(a) Straight chain
(b) Branched chain
(c) Aromatics
(d) None of these
Show Answer

Straight chain


30. For branched chain organic compounds, we use __________ as a prefix.
(a) Meta-
(b) Sento-
(c) Pico-
(d) Iso-
Show Answer

Iso-


31. _______ is the example of branched chain organic comps
(a) n-butane
(b) Iso-butane
(c) Cyclo-butane
(d) None of these
Show Answer

Iso-butane


32. Organic compounds in which each carbon atom in a molecule forms four_____ covalent bonds with other atom are called saturated organic compounds.
(a) Single
(b) Double
(c) Triple
(d) None of these
Show Answer

Single


33. Saturated organic compounds are ________
(a) Alkynes
(b) Alkenes
(c) Alkanes
(d) None of these
Show Answer

Alkenes


34. Following are the examples of alkanes EXCEPT :
(a) Methane
(b) Ethane
(c) Propane
(d) Butane
Show Answer

Butane


35. Organic compounds in which at least ______ covalent bond is present between carbon-carbon are called unsaturated organic compounds.
(a) Double
(b) Triple
(c) Single
(d) Both a and b
Show Answer

Both a and b


36. Those organic compounds in which carbon atoms are linked together to form a close chain structure is called _______ organic compounds.
(a) Close chain
(b) Open chain
(c) Branched chain
(d) None of these
Show Answer

Close chain


37. _______ organic compounds are those organic compounds in which the ring is composed of only carbon atoms
(a) Homocyclic
(b) carbocyclic
(c) Both a and b
(d)
Show Answer

Both a and b


38. The cyclic organic compounds having alternate single or double bonds in its structural carbon ring is called _______ organic compounds.
(a) Hetrocyclic
(b) Aromatic
(c) Alicyclic
(d) None of these
Show Answer

Aromatic


39. ________ is the example of aromatic organic compounds.
(a) Benzene
(b) Furane
(c) Cyclopropane
(d) None of these
Show Answer

Benzene


40 The organic compounds which contain hetro atoms other than carbon in its ring is called ________ organic compounds
(a) Homocylic
(b) Carbocyclic
(c) Herocyclic
(d) None of these
Show Answer

Homocylic


41. Following are the examples of hetrocyclic organic compounds EXCEPT :
(a) Furane
(b) Anthracene
(c) Thiophene
(d) Pyridine
Show Answer

Anthracene


42. Carbon can make a bonds with many other atoms :
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) All of them
Show Answer

All of them


43. Carbon is a ________ atom.
(a) Monovalent
(b) Tetravalent
(c) Pentavalent
(d) None of these
Show Answer

Tetravalent


44. ________ atom can form four covalent bonds.
(a) Carbon
(b) Hydrogen
(c) Sodium
(d) None of these
Show Answer

Carbon


45. Carbon atom can form ________ bond in their compounds.
(a) Single
(b) Double
(c) Triple
(d) All of them
Show Answer

All of them


46. The self-linking ability of carbon is called _________
(a) Alkylation
(b) Catenation
(c) Magnitude
(d) None of these
Show Answer

Catenation


47. _______ are the compounds that have same molecular formula but different structural formula.
(a) Isomers
(b) Halogens
(c) CFCs
(d) None of these
Show Answer

Isomers


48. The size of carbon atom is very _________ due to carbon –carbon strong covalent bonds.
(a) Large
(b) Intermediate
(c) Small
(d) None of these
Show Answer

Small


49. Organic compounds are mainly composed of _______ atoms.
(a) C only
(b) C and H
(c) Hydrogen only
(d) None of these
Show Answer

C and H


50. Organic compounds may include :
(a) Oxygen , Sulphur
(b) Nitrogen , phosphorus
(c) Halogens
(d) All of them
Show Answer

All of them


51. Organic compounds are _________ bonded compounds.
(a) Covalently
(b) Ionic
(c) Metallic
(d) None of these
Show Answer

Covalently


52. Organic compounds are mainly ________ in nature.
(a) Polar
(b) Non-polar
(c) Semi-polar
(d) None of these
Show Answer

Non-polar


53. The organic compounds do not ionize in ______ solution.
(a) Aqueous
(b) Molten
(c) Colloids
(d) None of these
Show Answer

Aqueous


54. Organic compounds are soluble in _________ solvents.
(a) Polar
(b) Non-polar
(c) Both a & b
(d) None of these
Show Answer

Non-polar


55. The examples of non-polar solvents are :
(a) Ether
(b) Benzene
(c) Carbon tetrachloride
(d) All of them
Show Answer

All of them


56. Organic compounds have generally _________ melting and boiling points.
(a) low
(b) High
(c) Constant
(d) None of these
Show Answer

low


57. Organic compounds are _______ in nature.
(a) Alkaline
(b) Volatile
(c) Isomeric
(d) None of these
Show Answer

Volatile


58. Organic compounds are thermally ________ and inflammable
(a) Unstable
(b) Stable
(c) Insulator
(d) None of these
Show Answer

Unstable


59. Reaction that involve organic compounds are much _______ as compared to other reactions.
(a) Faster
(b) Slower
(c) Intermediate
(d) None of these
Show Answer

Slower


60 Organic compounds reaction need heat and ______ to speed up the reaction.
(a) Salt
(b) Acid
(c) Indicator
(d) Catalyst
Show Answer

Catalyst


61 On burning , the organic compounds produce _______ flame due to incomplete combustion .
(a) Smoky
(b) Foggy
(c) Soapy
(d) None
Show Answer

Smoky


62. _____ is the phenomenon in which two or more compounds having same molecular formula but different structural formula.
(a) Flammability
(b) Covalent nature
(c) Isomerism
(d) None of these
Show Answer

Isomerism


63. Different organic compounds show similarities with each other due to same ________
(a) Composition
(b) Functional group
(c) Reactivity
(d) None of these
Show Answer

Functional group


64. Organic compounds are _______ conductor of electricity both in fused and in solution.
(a) Poor conductor
(b) Good conductor
(c) Insulator
(d) None of these
Show Answer

Poor conductor


65. Some organic compounds such as _______ are obtained from animals in the form meat , mutton , chicken etc.
(a) Carbohydrate
(b) Lipids
(c) Proteins
(d) None of these
Show Answer

Proteins


66. _______ are obtained in the form of animal fat , milk etc.
(a) Lipids
(b) Fats
(c) Proteins
(d) None of these
Show Answer

Fats


67. Plants prepare a ________ number of organic compounds.
(a) Large
(b) Small
(c) Half
(d) None of these
Show Answer

Large


68. When plants and animals are dead, they are buried under high temperature and pressure to convert it into ___
(a) Fossil fuels
(b) Hydrocarbon
(c) Asphalt
(d) None of these
Show Answer

Fossil fuels


69. Coal is blackish brown ____ and a major source of organic compounds.
(a) Gaseous
(b) Liquid mass
(c) Solid mass
(d) None of these
Show Answer

Solid mass


70. It is believed that coal is formed from the remains of _______
(a) Animals
(b) Plants
(c) Microorganisms.
(d) None of these
Show Answer

Plants


71. In millions of years , coal is formed under _____ action.
(a) Bacterial
(b) Chemical
(c) Both a and b
(d) None of these
Show Answer

Both a and b


72. The plants under those circumstances firstly converted into :
(a) Peat
(b) Lignite
(c) Bituminous
(d) Anthracite
Show Answer

Peat


73. When coal is strongly heated in absence of air , this process is called _________
(a) Coalification
(b) Carbonization
(c) Aeration
(d) None of these
Show Answer

Carbonization


74. During carbonization , coal is converted into :
(a) Coke , coal gas
(b) Coal tar
(c) Ammonical liquor
(d) All of them
Show Answer

All of them


75. The word petroleum is derived from two ______ words.
(a) Latin
(b) Greek
(c) Person
(d) None of these
Show Answer

Latin


76. In petroleum , the word “petra” means _____
(a) Oil
(b) Rock
(c) Sand
(d) None of these
Show Answer

Rock


77. In petroleum , the word “ oleum” means ______
(a) Rock
(b) Sand
(c) Oil
(d) None of these
Show Answer

Oil


78. Mineral oil , crude oil , liquid gold are other names of _______
(a) Petroleum
(b) Coal
(c) Natural gas
(d) None of these
Show Answer

Petroleum


79. Petroleum is a complex ______ of solids , liquid and gaseous hydrocarbons, water, salts and earth particles.
(a) Mixture
(b) Compounds
(c) Isotopes
(d) None of these
Show Answer

Mixture


80. Petroleum is _____ coloured having unpleasant smell.
(a) Gold
(b) Redolish
(c) Dark Brown
(d) None of these
Show Answer

Dark Brown


81. The _____ is a mixture of low molecular mass gaseous hydrocarbon.
(a) Petroleum
(b) Natural gas
(c) Coal
(d) None of these
Show Answer

Natural gas


82. It is mainly composed of low _______ hydrocarbons.
(a) Boiling point
(b) High boiling point
(c) Freezing point
(d) None of these
Show Answer

Boiling point


83. _______ is the main component of natural gas.
(a) Propane
(b) Ethane
(c) Methane
(d) None of these
Show Answer

Methane


84. Natural gas is composed _______ of methane .
(a) 50 to 80 %
(b) 85 to 95 %
(c) 95 to 98 %
(d) None of these
Show Answer

85 to 95 %


85. In Pakistan , natural gas is known as __________
(a) Sui gas
(b) Marsh gas
(c) LPG
(d) None of these
Show Answer

Sui gas


86. Natural gas is used as a fuel in automobiles as ________
(a) Sui gas
(b) Liquid gold
(c) CNG
(d) None of these
Show Answer

CNG


87. Natural gas is used in the preparation of :
(a) Diamond
(b) Carbon black
(c) Soot
(d) None of these
Show Answer

Carbon black


88. The leaves, stems, fruits, flowers, seeds and roots of plants etc are called _______
(a) Natural products
(b) Basic products
(c) None
(d) None of these
Show Answer

Natural products


89. Most natural products are extracted from plants and are used as _______
(a) Fertilizer
(b) Medicines
(c) Cooling agent
(d) None of these
Show Answer

Medicines


90. Upto the ______ century, it was believed that living things can prepare organic compounds.
(a) 19^{th}
(b) 20^{th}
(c) 21^{st}
(d) None of these
Show Answer

19^{th}


91. The vital force theory was proved wrong by the German chemist _____
(a) Friedrich wohler
(b) Dimitri Johnson
(c) Coady
(d) None of these
Show Answer

Friedrich wohler


92. Friedrich wohler prepared _______ form inorganic compounds on heating.
(a) Urea
(b) Alcohol
(c) Barley
(d) None of these
Show Answer

Urea


93. Hydrocarbons that contain only ______ covalent bonds between carbon atoms are called alkanes.
(a) Single
(b) Double
(c) Triple
(d) None of these
Show Answer

Single


94. Alkanes are ______ hydrocarbon
(a) Unsaturated
(b) Super- saturated
(c) Saturated
(d) None of these
Show Answer

Saturated


95. Alkanes are also called _______
(a) Olefins
(b) Paraffins
(c) Antigens
(d) None of these
Show Answer

Paraffins


96. Alkanes are _____ due to their saturated nature.
(a) More reactive
(b) Stable
(c) Less reactive
(d) None of these
Show Answer

Less reactive


97. Methane , ethane, propane etc are the examples of _____
(a) Alkanes
(b) Alkenes
(c) Alkynes
(d) None of these
Show Answer

Alkanes


98. A series of organic compounds that have similar structural features but differ from adjacent members by a _____ group is called homologs series .
(a) Methyl
(b) Methylene
(c) Methane
(d) None of these
Show Answer

Methylene


99. Each member of homologs series is called _______
(a) Homologue
(b) Radical
(c) Isomer
(d) None of these
Show Answer

Homologue


100. A homologue series have ______ general formula.
(a) Different
(b) Same
(c) Both a and b
(d) None of these
Show Answer

Same


101. Cycloalkanes are alkanes , in which carbon atoms are arranged in a ______ structure.
(a) Straight chain
(b) Branched chain
(c) Ring
(d) None of these
Show Answer

Ring


102. There are no _______ carbons in cycloalkane.
(a) Primary
(b) Secondary
(c) Tertiary
(d) None of these
Show Answer

Primary


103. Cycloalkanes has _____ hydrogen atoms than straight chain alkanes.
(a) Two more
(b) Two less
(c) Same
(d) None of these
Show Answer

Two less


104. The formula of cyclobutane is :
(a) C_4H_8
(b) C_4H_{10}
(c) C_4H_9
(d) None of these
Show Answer

C_4H_8


105. Alkyl radicals are group of atoms formed when one hydrogen atom is _____ from alkane molecule.
(a) Added
(b) Removed
(c) Remains constant
(d) None of these
Show Answer

Removed


106. Alkyl radical is represented by a letter ______
(a) A
(b) r
(c) a
(d) R
Show Answer

R


107. The general formula for alkyl radical is :
(a) C_n H_{2n +1}
(b) C_n H_{2n +2}
(c) C_n H_{2n -2}
(d) None of these
Show Answer

C_n H_{2n +1}


108. When one hydrogen is removed from methane , it becomes :
(a) Pentyl
(b) Methyl
(c) Butyl
(d) None of these
Show Answer

Methyl


109. The molecular formula for methyl radical is :
(a) CH_4
(b) CH_2
(c) CH_3
(d) None of these
Show Answer

CH_3


110. Functional group of an atom or group of atom attached with R that is responsible for specific properties of ___ compounds
(a) Organic
(b) Inorganic
(c) Biochemical
(d) None of these
Show Answer

Organic


111. The reactive portion of molecule , containing _____ is called functional group.
(a) Only carbon
(b) Other elements
(c) Only hydrogen
(d) None of these
Show Answer

Other elements


112. All compounds that have same _______ have similar properties
(a) Functional group
(b) Alkyl radical
(c) No of carbons
(d) None of these
Show Answer

Functional group


113. The functional group of alcohol is _______
(a) -O-
(b) -OH
(c) -C-
(d) None of these
Show Answer

-OH


114. The general formula of alcohol is ____
(a) R-O-R
(b) R-CHO
(c) R-OH
(d) None of these
Show Answer

R-OH


115. Methyl and ethyl alcohols are the examples of ____ functional group
(a) Ether
(b) Ketone
(c) Alcohol
(d) None of these
Show Answer

Alcohol


116. The functional group of ether is _______
(a) -O-
(b) -OH
(c) -C
(d) None of these
Show Answer

-O-


117. The general formula for ether is _____
(a) R-CHO
(b) R-O-R
(c) R-OH
(d) None of these
Show Answer

R-O-R


118. The structural formula for dimethyl ether is :
(a) CH_3-O-CH_3
(b) C_3H_5-O-C_H_3
(c) C_2H_5-O-C_2H_5
(d) None of these
Show Answer

CH_3-O-CH_3


119. A _______ group is a functional group composed of a carbon atom double bonded to an oxygen atom.
(a) Amines
(b) Esters
(c) Carbonyl
(d) None of these
Show Answer

Carbonyl


121. ______ are the types of carbonyl functional group .
(a) Aldehyde
(b) Ketone
(c) Both a and b
(d) None of these
Show Answer

Both a and b


123. The example of aldehyde is ________
(a) Formic acid
(b) Acetaldehyde
(c) Acetic acid
(d) None of these
Show Answer

Acetaldehyde


124. A type of carbonyl functional group in which carbon atoms are bonded on both sides of the functional group is
(a) Ketone
(b) Aldehyde
(c) Amines
(d) None of these
Show Answer

Ketone


125. The example of ketonic functional group is :
(a) Formaldehyde
(b) Acetaldehyde
(c) Acetone
(d) None of these
Show Answer

Acetone


126. The functional group of carboxylic acid is :
(a) R-NH_2
(b) COOH
(c) R-X
(d) None of these
Show Answer

COOH


127. The example of carboxylic acid is :
(a) Formic
(b) Acetic acid
(c) Both a and b
(d) None of these
Show Answer

Both a and b


128. Organic compounds compared of C , H and N as functional groups are called _________
(a) Amines
(b) Halides
(c) Ketones
(d) None of these
Show Answer

Amines


129. The functional group of amines is _____ group.
(a) NH_2
(b) CH_2
(c) X
(d) HCl
Show Answer

NH_2


130. The general formula for amines is :
(a) R-X
(b) R-CHO
(c) R-NH_2
(d) None of these
Show Answer

R-NH_2


131. Organic compounds composed of C, H and X (halogens) as functional group are called ______
(a) Ethynes
(b) Alkyl halides
(c) Esters
(d) None of these
Show Answer

Alkyl halides


132. The general formula for alkyl halides is :
(a) R-X
(b) R-O-R
(c) R-NH_2
(d) None of these
Show Answer

R-X


133. The example of alkyl halides is :
(a) Methyl propane
(b) Methyl chloride
(c) Methyl-pentane
(d) None of these
Show Answer

Methyl chloride


134. The condensed structural formula of butane is ,
(a) CH_3-CH_2-CH_2-CH_3
(b) CH_3(CH)_2CH_3
(c) C_4H_{10}
(d) None of these
Show Answer

CH_3(CH)_2CH_3


135. The compounds C_6H_{12} must have
(a) All single bonds
(b) At least one double bond
(c) At least one triple bond
(d) All double bond
Show Answer

At least one double bond


136. Which of the following is an inorganic compound.
(a) CH_4
(b) CH_3OH
(c) NaCN
(d) CH_3Cl
Show Answer

NaCN


137. Alkyl halid is composed of carbon, hydrogen and
(a) Oxygen
(b) Nitrogen
(c) Halogen
(d) Sulphur
Show Answer

Halogen


138. Which of the following is an alcohol
(a) CH_3 –O-CH_3
(b) CH_3-CH_2-OH
(c) CH_3COOH
(d) CH_3-COH
Show Answer

CH_3-CH_2-OH


139. Unsaturated hydrocarbon is
(a) C_3H_8
(b) C_2H_6
(c) C_3H_6
(d) CH_4
Show Answer

C_3H_6


140. Natural gas is mainly composed of
(a) CH_4
(b) C_2H_8
(c) C_2H_6
(d) C_2H_2
Show Answer

CH_4


141. Catenation is the linkage of carbon with other
(a) Oxygen atoms
(b) Carbon atoms
(c) Nitrogen atoms
(d) Halogen
Show Answer

Carbon atoms


142. Oxygen is attached on both sides to carbon atom in
(a) Alcohol
(b) Ketone
(c) Aldehyde
(d) Ether
Show Answer

Ether

Chemistry Class 10 MCQs (All Chapters)


Jawad Khan

Jawad Khan

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