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Carbon - I

Introduction to carbon chemistry covering allotropes (diamond, graphite, charcoal, coke), organic compounds, and carbon-containing materials

16 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following elements is common in petroleum, coal, fabrics and proteins?

  1. Carbon
  2. Sodium
  3. Calcium
  4. Chlorine
Question 2 Multiple Choice (Single Answer)

Which of the following could be observed by studying the structure of graphite?

  1. Carbon exists in combination with nitrogen.
  2. Carbon exists in free state.
  3. Carbon and hydrogen are combined by triple bond.
  4. Carbon, hydrogen and oxygen are in combined state.
Question 3 Multiple Choice (Single Answer)

Coal is formed over millions of years by

  1. degradation of plant and animal waste products
  2. weathering of rocks
  3. action of heat on rocks
  4. decomposition of plants
Question 4 Multiple Choice (Single Answer)

Which of the following statements is true for diamond?

  1. It consists of carbon in combined state.
  2. It is the most abundant carbon compound in nature.
  3. It is a crystalline form of carbon.
  4. It is formed by decomposition of plants.
Question 5 Multiple Choice (Single Answer)

Which of the following is true for bread, meat, vegetables and vitamins?

  1. All consist of carbon compounds.
  2. All are required to produce energy.
  3. All consist of hydrocarbon.
  4. All are rich sources of minerals.
Question 6 Multiple Choice (Single Answer)

Which of the following carbon compounds contains methane as a major component?

  1. Fats
  2. Coal
  3. Natural gas
  4. Calcite
Question 7 Multiple Choice (Single Answer)

Which of the following is an organic compound?

  1. CO
  2. CH4
  3. NaHCO3
  4. CaCO3
Question 8 Multiple Choice (Single Answer)

Which of the following statements is not true?

  1. Carbon can exist in free state in nature.
  2. Diamond is the hardest substance known.
  3. Graphite is a bad conductor of electricity.
  4. Glucose is an organic compound.
Question 9 Multiple Choice (Single Answer)

When a substance is cut with a sharp knife, pieces with curved faces are formed. Which of the following could be the substance?

  1. Sugar
  2. Diamond
  3. Pitch
  4. Forms
Question 10 Multiple Choice (Single Answer)

A substance does not melt sharply at a definite temperature, but soften over a range of temperature when heated. Which of the following substance will show such characteristic?

  1. Diamond
  2. Graphite
  3. Alum
  4. Pitch
Question 11 Multiple Choice (Single Answer)

Match the following:

 
(i) Graphite
 
            (ii) Carbon dioxide
            (iii) Marble                    
        <div align="justify">    (iv) Petroleum</div>            </div>            |            <div align="justify">    (A) Hydrocarbons
        <div align="justify">    (B) Free form carbon
        <div align="justify">    (C) Gas
        <div align="justify">    (D) Carbonate</div>            </div>            </div>            </div>            |
  1. (i) - D, (ii) - B, (iii) - A, (iv) - C
  2. (i) - B, (ii) - C, (iii) - D, (iv) - A
  3. (i) - B, (ii) - D, (iii) - C, (iv) - A
  4. (i) - D, (ii) - A, (iii) - B, (iv) - C
Question 12 Multiple Choice (Single Answer)

Which of the following substance will not show conchoidal fracture on being broken?

  1. Pitch
  2. Glass
  3. Graphite
  4. Plastic
Question 13 Multiple Choice (Single Answer)

What are the two different forms of an element varying in physical and chemical properties called?

  1. Crystalline form
  2. Carbonized form
  3. Allotropic form
  4. Amorphous form
Question 14 Multiple Choice (Single Answer)

Which of the following is a microcrystalline form of carbon?

  1. Coke
  2. Diamond
  3. Graphite
  4. Fullerene
Question 15 Multiple Choice (Single Answer)

Which of the following element exists only in a single elemental form?

  1. Carbon
  2. Nitrogen
  3. Oxygen
  4. Phosphorus
Question 16 Multiple Choice (Single Answer)

Match the following
(i) Graphite (A) Amorphous
(ii) Diamond (B) Good conductor of electricity
(iii) Charcoal (C) Hardest substance
  1. (i) - A, (ii) - C, (iii) - B
  2. (i) - B, (ii) - C, (iii) - A
  3. (i) - C, (ii) - A, (iii) - B
  4. (i) - B, (ii) - A, (iii) - C
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