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Class 10 Science Chapter 4 Question Answers - Carbon and its compounds

Q1: Draw the electron dot notation of the O2 molecule.
Ans: In the electron dot notation for O2, two oxygen atoms share a double bond, with each oxygen having six valence electrons denoted by dots. The shared pair forms a stable configuration satisfying the octet rule. 

Class 10 Science Chapter 4 Question Answers - Carbon and its compounds
Q2: Name a molecule that has a triple bond.

Ans: Nitrogen (N2).

Q3: Name the hardest substance which is an allotrope of carbon.
Ans: Diamond.

Q4: Name the allotrope of carbon which have the structure of C-60.
Ans: Fullerenes.

Q5: Name the unique ability of carbon to form bonds with other atoms of carbon.
Ans: Catenation.

Q6: Mention the two characteristic features seen in carbon.
Ans: 
Tetravalency and catenation.

Q7: Name the first organic compound synthesized by Wohler.
Ans: 
Urea.

Q8:  Write the general molecular formula of the alkane series.
Ans:
CnH2n+2

Q9: Write the IUPAC name of the following compound:
         CH3CH2CH2CH2—C ≡ C—H
Ans:
Hex-1-yne.
The hex adder calculator is an efficient tool for adding two hex values. Similarly, the Hex calculator can easily calculate two given values.

Q10: Identify the functional group present in the following compound:
Class 10 Science Chapter 4 Question Answers - Carbon and its compoundsAns: Aldehyde.

Q11: How many covalent bonds are in a molecule of ethane, C2H6?
Ans:
Seven (7)

Class 10 Science Chapter 4 Question Answers - Carbon and its compounds

Q12: Draw the structure of the hexanal molecule, C5H11CHO.
Ans:

Class 10 Science Chapter 4 Question Answers - Carbon and its compounds

Q13: Write the name and formula of the 2nd member of the homologous series having the general formula CnH2n.  
Ans: 
CnH2n : Alkene
2nd member = C3H6 (propene)

Q14: Write the molecular formula of an alkyne containing 10 hydrogen atoms.
Ans:
C6H10.

Q15: Why is ethanoic acid known as glacial acetic acid?
Ans: Acetic acid 3 at 290 K forms crystals that look like glaciers, so pure ethanoic acid is known as glacial acetic acid.

Q16: Which property of ethanol makes it suitable for preparing medicines such as tincture iodine, cough syrup, and other tonics?
Ans: 
Ethanol is a good solvent.

Q17: What is the function of a cone? H2SO4 in the formation of ethene from ethanol?
Ans: 
Dehydrating agent

Q18: Name the alcohol which is an active ingredient of all alcoholic drinks.
Ans:
Ethanol or ethyl alcohol (C2H5OH)

Q19: Which two of the following compounds could belong to the same homologous series?
C2H6O2, C2H6O, C3H28, CH4O
Ans:
CH4O and C2H6O (General formula CnH2n+1OH)

Q20: Which of the following molecules is called buckminsterfullerene?
C90, C60, C70, C120
Ans: 
C60.

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FAQs on Class 10 Science Chapter 4 Question Answers - Carbon and its compounds

1. What is carbon?
Ans. Carbon is a chemical element that is essential for life and is found in all living organisms. It is known for its ability to form a wide variety of compounds due to its unique bonding properties.
2. What are carbon compounds?
Ans. Carbon compounds are chemical compounds that contain carbon atoms bonded to other elements such as hydrogen, oxygen, nitrogen, and many others. These compounds are the basis of organic chemistry and are found in various forms including carbohydrates, proteins, fats, and DNA.
3. How is carbon dioxide formed?
Ans. Carbon dioxide (CO2) is formed through the combustion of carbon-based materials such as fossil fuels (coal, oil, and natural gas), as well as through cellular respiration in living organisms. It is a greenhouse gas that contributes to climate change.
4. What are hydrocarbons?
Ans. Hydrocarbons are organic compounds composed of only carbon and hydrogen atoms. They are the simplest form of carbon compounds and include substances such as methane, ethane, propane, and gasoline. Hydrocarbons are widely used as fuels and raw materials in various industries.
5. What is the importance of carbon compounds in daily life?
Ans. Carbon compounds have immense importance in daily life. They are the building blocks of life and are present in all living organisms. They form essential components such as carbohydrates, proteins, lipids, and nucleic acids, which are vital for biological processes. Carbon compounds also have numerous industrial applications, including the production of plastics, medicines, dyes, and solvents.
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