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Grade 11 Exam  >  Grade 11 Tests  >  Chemistry for Grade 11 (IGCSE)  >  Test: Formulas and Functional Groups & Homologous Series - Grade 11 MCQ

Test: Formulas and Functional Groups & Homologous Series - Grade 11 MCQ


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15 Questions MCQ Test Chemistry for Grade 11 (IGCSE) - Test: Formulas and Functional Groups & Homologous Series

Test: Formulas and Functional Groups & Homologous Series for Grade 11 2024 is part of Chemistry for Grade 11 (IGCSE) preparation. The Test: Formulas and Functional Groups & Homologous Series questions and answers have been prepared according to the Grade 11 exam syllabus.The Test: Formulas and Functional Groups & Homologous Series MCQs are made for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Formulas and Functional Groups & Homologous Series below.
Solutions of Test: Formulas and Functional Groups & Homologous Series questions in English are available as part of our Chemistry for Grade 11 (IGCSE) for Grade 11 & Test: Formulas and Functional Groups & Homologous Series solutions in Hindi for Chemistry for Grade 11 (IGCSE) course. Download more important topics, notes, lectures and mock test series for Grade 11 Exam by signing up for free. Attempt Test: Formulas and Functional Groups & Homologous Series | 15 questions in 15 minutes | Mock test for Grade 11 preparation | Free important questions MCQ to study Chemistry for Grade 11 (IGCSE) for Grade 11 Exam | Download free PDF with solutions
Test: Formulas and Functional Groups & Homologous Series - Question 1
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What does the displayed formula in organic chemistry primarily illustrate?

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The displayed formula in organic chemistry provides a visual representation of the spatial arrangement of atoms and bonds within a molecule. It helps us understand how atoms are connected and positioned in the compound's structure. By looking at the displayed formula, we can determine the connectivity of atoms, the types of bonds present, and the overall shape of the molecule. This form of representation is crucial for chemists to analyze and predict the properties and behavior of organic compounds.
Test: Formulas and Functional Groups & Homologous Series - Question 2
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How are hydrocarbons defined in organic chemistry?

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In organic chemistry, hydrocarbons are defined as compounds that exclusively consist of hydrogen and carbon atoms. These compounds form the basis of organic chemistry and are essential in various industrial processes and biological systems. By understanding the properties and reactions of hydrocarbons, chemists can delve deeper into the study of organic compounds and their applications in different fields.
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Test: Formulas and Functional Groups & Homologous Series - Question 3
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What information can be inferred from the displayed formula of an organic compound?

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The displayed formula of an organic compound provides crucial details about the spatial arrangement of atoms and bonds within the molecule. By analyzing the displayed formula, chemists can deduce how the atoms are connected, whether double or triple bonds are present, and the overall structure of the compound. This information is vital for understanding the chemical properties and behavior of the organic compound in various reactions and processes.
Test: Formulas and Functional Groups & Homologous Series - Question 4
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What distinguishes organic compounds from inorganic compounds?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 4
The key distinction between organic and inorganic compounds lies in the presence of carbon. Organic compounds are defined by the presence of carbon atoms, often bonded to hydrogen and other elements. In contrast, inorganic compounds typically do not contain carbon-hydrogen bonds and may consist of elements other than carbon. This fundamental difference forms the basis of the classification of compounds in chemistry and influences their properties and reactivity.
Test: Formulas and Functional Groups & Homologous Series - Question 5
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What is the key characteristic of structural isomers?
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Structural isomers are compounds that share the same molecular formula but have varying spatial arrangements of atoms. This means they have the same number of each type of atom but are connected in different ways. This phenomenon leads to different structural formulas and distinct properties despite having the same molecular formula. This concept is crucial in understanding the diversity and complexity of organic compounds.
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How are identical groups typically represented in structural formulae?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 6
In structural formulae, identical groups are often grouped together within brackets for simplification. This notation helps to streamline the representation of complex molecules by indicating repeating groups without the need to draw them out in full detail. This technique enhances clarity while maintaining the essential information about the molecular structure.
Test: Formulas and Functional Groups & Homologous Series - Question 7
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Why are double and triple bonds always depicted in structural formulae?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 7
Double and triple bonds are always depicted in structural formulae to emphasize their presence. These bonds play a significant role in determining the properties and reactivity of organic compounds. By explicitly showing these bonds, the structural formula provides crucial information about the connectivity of atoms and the nature of chemical bonds within the molecule.
Test: Formulas and Functional Groups & Homologous Series - Question 8
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In the general formula CnH2n+2 for alkanes, what does 'n' represent?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 8
In the general formula CnH2n+2 for alkanes, 'n' represents the number of carbon atoms in the alkane molecule. By knowing the value of 'n' and substituting it into the formula, one can determine the specific composition and structure of the alkane, including the number of hydrogen atoms present.
Test: Formulas and Functional Groups & Homologous Series - Question 9
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What is the primary defining characteristic of a homologous series of organic compounds?
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The primary defining characteristic of a homologous series of organic compounds is the presence of identical functional groups across all members of the series. This shared functional group is responsible for the similar chemical properties exhibited by compounds within the same homologous series.
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What is the significance of the functional group in organic compounds belonging to a homologous series?
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The functional group in organic compounds belonging to a homologous series plays a crucial role as it is responsible for the characteristic reactions exhibited by each member of the series. The specific arrangement of atoms in the functional group dictates how the compound will react under various conditions, making it a key determinant of the compound's chemical behavior and properties.
Test: Formulas and Functional Groups & Homologous Series - Question 11
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How do general formulae contribute to identifying compounds within a homologous series?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 11
General formulae play a crucial role in identifying compounds within a homologous series by revealing the composition based on the number of carbon atoms present in the molecules. By understanding the general formula and knowing the value of 'n', one can determine the specific molecular structure and properties of the compound in relation to other members of the series.
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What is a key characteristic shared by all members of a homologous series?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 12
All members of a homologous series share the same general formula. This characteristic is fundamental to homologous series as it signifies a consistent molecular structure among its members, allowing for predictable chemical behavior and properties. For example, in the homologous series of alcohols, such as ethanol and propanol, the shared general formula is a defining feature that underpins their chemical similarity despite variations in molecular size.
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What property exhibits a gradation among consecutive members of a homologous series?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 13
A gradation in melting and boiling points is observed among consecutive members of a homologous series. This trend occurs due to the incremental increase in molecular size and weight as one moves from one member to the next in the series. The concept of a gradual change in physical properties like melting and boiling points is essential in understanding the systematic variations within a homologous series.
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In a homologous series, what is the typical difference in the molecular formula between consecutive members?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 14
The typical difference in the molecular formula between consecutive members of a homologous series is CH2. This consistent difference signifies the incremental addition of a methylene (-CH2-) group in the molecular structure as one progresses from one member to the next in the series. Understanding this pattern aids in predicting the molecular formulas of successive members within the homologous series.
Test: Formulas and Functional Groups & Homologous Series - Question 15
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Which aspect is NOT a characteristic shared by all members of a homologous series?
Detailed Solution for Test: Formulas and Functional Groups & Homologous Series - Question 15
Different general formulas are not shared by all members of a homologous series. A key feature of homologous series is the consistent use of the same general formula across all its members, which contributes to their structural similarity and predictable chemical behavior. Deviations from this pattern would disrupt the systematic nature of a homologous series, impacting its classification and properties.
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