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NDA Carbon and its Compounds — practice questions

Explore 15 free Carbon and its Compounds questions in NDA Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Carbon and its Compounds questions and exercises with answers

Showing questions 1–15 of 15.

The valency of carbon isRead the answer and worked solution →Carbon predominantly formsRead the answer and worked solution →The ability of carbon to form long chains and various structures with itself is calledRead the answer and worked solution →The general formula for saturated hydrocarbons (alkanes) isRead the answer and worked solution →The functional group present in ethanol (CH₃CH₂OH) isRead the answer and worked solution →When ethanol is heated with concentrated H₂SO₄ at 443 K, it undergoesRead the answer and worked solution →Ethanoic acid (acetic acid, CH₃COOH) reacts with ethanol in the presence of an acid catalyst to formRead the answer and worked solution →The presence of a double bond between two carbon atoms makes the compoundRead the answer and worked solution →The IUPAC name of CH₃−CH₂−CH₂−CH₃ isRead the answer and worked solution →When soap is added to water, the ionic (hydrophilic) end of the soap molecule interacts withRead the answer and worked solution →The two allotropes of carbon found naturally areRead the answer and worked solution →Which of the following is used for making cutting tools due to its extreme hardness?Read the answer and worked solution →The compound formed when ethanol undergoes complete combustion isRead the answer and worked solution →When ethanol reacts with sodium metal, one of the products isRead the answer and worked solution →The functional group in acetic acid (CH₃COOH) isRead the answer and worked solution →

Worked practice questions

The valency of carbon is

  1. 4
  2. 3
  3. 2
  4. 6
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Correct answer: A. 4

1. Carbon has 6 electrons: 2 in K-shell, 4 in L-shell. 2. To attain nearest noble gas configuration, it needs 4 more electrons. 3. It shares 4 electrons with other atoms via covalent bonds. 4. So carbon's valency is 4 (tetravalent). _Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4 introduction_

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Carbon predominantly forms

  1. Ionic bonds by losing 4 electrons
  2. Covalent bonds by sharing electrons
  3. Ionic bonds by gaining 4 electrons
  4. Coordinate bonds only
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Correct answer: B. Covalent bonds by sharing electrons

1. Losing 4 electrons requires huge energy — energetically not feasible. 2. Gaining 4 electrons produces highly unstable C⁴⁻ — also not feasible. 3. So carbon shares electrons and forms strong covalent bonds. 4. Sharing gives carbon the ability to form long chains and branched structures. _Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4.1_

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The ability of carbon to form long chains and various structures with itself is called

  1. Isomerism
  2. Allotropy
  3. Catenation
  4. Polymerisation
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Correct answer: C. Catenation

1. Catenation is the property of an element to bond with atoms of the same element to form long chains and rings. 2. Carbon shows catenation extensively — millions of organic compounds exist because of this. 3. Isomerism is different compounds with same molecular formula. 4. Allotropy is the same element in different forms (e.g. diamond, graphite). _Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4.2_

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More Chemistry topics

Chemical Reactions and EquationsUnit 6A1: Heat Transfer and CalorimetryElements, Compounds and MixturesUnit 8A: Acid-Base Properties & EquilibriaMetallurgyUnit 1B1: Atomic Structure & Quantum MechanicsUnit 1C1: Periodic Trends in Atomic PropertiesUnit 4B1: Properties of Metals and Non-Metals