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AP Intermediate 1st Year Hydrocarbons — practice questions — page 2

Explore 50 free Hydrocarbons questions in AP Intermediate 1st Year Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Hydrocarbons questions and exercises with answers

Showing questions 31–50 of 50.

Open chains of carbon atoms joined by single bonds are termed:Read the answer and worked solution →If carbon atoms form a closed chain or ring, they are termed:Read the answer and worked solution →Aromatic hydrocarbons are described as a special type of which compounds?Read the answer and worked solution →Toluene is the methyl derivative of:Read the answer and worked solution →The general formula for alkanes is:Read the answer and worked solution →Dihydrogen adds to alkenes and alkynes over catalysts to form:Read the answer and worked solution →Reactions replacing hydrogen atoms of alkanes are known as:Read the answer and worked solution →Higher alkanes heated to high temperature decompose in a process called:Read the answer and worked solution →Spatial arrangements interconverted by rotation about a single bond are called:Read the answer and worked solution →How many conformations can an alkane have by rotation about single bonds?Read the answer and worked solution →Across all conformations, what stays the same?Read the answer and worked solution →Eclipsed and staggered conformations are represented by Newman and:Read the answer and worked solution →An intermediate conformation between eclipsed and staggered is called:Read the answer and worked solution →Who framed the rule for adding HBr to unsymmetrical alkenes, in 1869?Read the answer and worked solution →Addition anti to Markovnikov rule is known as the peroxide or:Read the answer and worked solution →With which two hydrogen halides is the peroxide effect not observed?Read the answer and worked solution →LPG, a common domestic fuel, stands for:Read the answer and worked solution →Coal gas is obtained from coal by:Read the answer and worked solution →Saturated hydrocarbons whose carbon atoms form a ring are called:Read the answer and worked solution →Methane occurs naturally in:Read the answer and worked solution →

Worked practice questions

Open chains of carbon atoms joined by single bonds are termed:

  1. Alkalis
  2. Alkanes
  3. Alkenes
  4. Alkynes
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Correct answer: B. Alkanes

1. The chain is open and every bond is single. 2. That is the saturated open chain family. 3. Carbon atoms joined in an open chain with single bonds are termed alkanes. 4. So the answer is alkanes. _Source: syllabus Chemistry Part II, Unit 9 'Hydrocarbons'_

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If carbon atoms form a closed chain or ring, they are termed:

  1. Cycloalkanes
  2. Cyclopentenes
  3. Cyclobutynes
  4. Cyclohexynes
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Correct answer: A. Cycloalkanes

1. Closing the chain into a ring changes the family name. 2. The prefix marks the ring. 3. If carbon atoms form a closed chain or a ring, they are termed cycloalkanes. 4. So the answer is cycloalkanes. _Source: syllabus Chemistry Part II, Unit 9 'Hydrocarbons'_

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Aromatic hydrocarbons are described as a special type of which compounds?

  1. Covalent
  2. Cyclic
  3. Cationic
  4. Colloidal
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Correct answer: B. Cyclic

1. Aromatic compounds are built on rings. 2. That places them within one broad class. 3. Aromatic hydrocarbons are a special type of cyclic compounds. 4. So the answer is cyclic. _Source: syllabus Chemistry Part II, Unit 9 'Hydrocarbons'_

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