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NTSE Carbon and its Compounds — practice questions

Explore 30 free Carbon and its Compounds questions in NTSE 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 1–30 of 30.

Carbon forms four bonds because it has four valence electrons. Carbon is therefore:Read the answer and worked solution →A bond formed when two atoms share a pair of electrons is called a:Read the answer and worked solution →Covalent compounds conduct electricity poorly because they form no:Read the answer and worked solution →Diamond and graphite are both made only of carbon, so they are:Read the answer and worked solution →In graphite, each carbon atom is bonded to how many other carbon atoms?Read the answer and worked solution →The ability of carbon to form long chains with itself is called:Read the answer and worked solution →A compound whose carbon atoms are joined only by single bonds is called:Read the answer and worked solution →Compared with saturated carbon compounds, unsaturated ones are generally:Read the answer and worked solution →Two compounds share one molecular formula but differ in structure. They are:Read the answer and worked solution →Compounds made only of carbon and hydrogen are called:Read the answer and worked solution →Saturated hydrocarbons are known as:Read the answer and worked solution →Hydrocarbons containing one or more triple bonds are called:Read the answer and worked solution →The atom or group that decides the chemical properties of a carbon compound is the:Read the answer and worked solution →A series of compounds differing by one carbon, with the same functional group, is a:Read the answer and worked solution →Burning a saturated hydrocarbon in plenty of air generally gives a flame that is:Read the answer and worked solution →Limiting the air supply while burning any hydrocarbon leads to:Read the answer and worked solution →Alkaline potassium permanganate adds oxygen to ethanol. Such substances are called:Read the answer and worked solution →Vegetable oils are turned into solid fats by adding hydrogen using a catalyst of:Read the answer and worked solution →Ethanol is commonly known by the everyday name:Read the answer and worked solution →Ethanoic acid, used as a preservative in pickles, is commonly called:Read the answer and worked solution →The reaction of a fat or oil with sodium hydroxide to make soap is called:Read the answer and worked solution →Soap used in hard water leaves an insoluble substance behind, called:Read the answer and worked solution →Catch the hydrocarbonsRead the answer and worked solution →Pop the carbon formsRead the answer and worked solution →Run the carbon gatesRead the answer and worked solution →Slice the carbon termsRead the answer and worked solution →Saturated or notRead the answer and worked solution →Sort the carbon chemistryRead the answer and worked solution →Type the numberRead the answer and worked solution →Carbon bingoRead the answer and worked solution →

Worked practice questions

Carbon forms four bonds because it has four valence electrons. Carbon is therefore:

  1. Tetravalent
  2. Univalent
  3. Divalent
  4. Trivalent
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Correct answer: A. Tetravalent

1. Valency counts how many bonds an atom can form. 2. Carbon has four electrons in its outer shell. 3. So carbon is tetravalent. _Source: syllabus Science Class X, Chapter 4, Carbon and its Compounds._

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A bond formed when two atoms share a pair of electrons is called a:

  1. Hydrogen bond
  2. Covalent bond
  3. Metallic bond
  4. Magnetic bond
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Correct answer: B. Covalent bond

1. Electrons can be transferred or shared. 2. Sharing between two atoms makes one kind of bond. 3. That bond is covalent. _Source: syllabus Science Class X, Chapter 4, Carbon and its Compounds._

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Covalent compounds conduct electricity poorly because they form no:

  1. Charged particles
  2. Crystal patterns
  3. Chemical formula
  4. Carbon skeletons
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Correct answer: A. Charged particles

1. Conduction needs free charges to move. 2. Sharing electrons produces no ions. 3. So no charged particles are formed. _Source: syllabus Science Class X, Chapter 4, Carbon and its Compounds._

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