Chemistry teacher

  Very Short Answer Type Questions for Class 10 CBSE - Carbon and Its Compounds , along with answers: 1. Q: Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas? A: The gas evolved is carbon dioxide (CO₂) . It can be confirmed by passing it through lime water , which turns milky . 2. Q: Which of the following will give brisk effervescence with sodium hydrogencarbonate and why? CH₃COOH, CH₃CH₂OH A: CH₃COOH (ethanoic acid) will give brisk effervescence because it reacts with NaHCO₃ to release CO₂ gas. Ethanol (CH₃CH₂OH) does not react with NaHCO₃. 3. Q: Name the functional group present in an organic compound which gives brisk effervescence with NaHCO₃. A: Carboxylic acid group (–COOH) 4. Q: Name the hydrocarbon formed when ethanol is heated with conc. H₂SO₄ at 170°C. What is this reaction known as? A: The hydrocarbon formed is ethene (C₂H₄) . This reaction is called dehydration of ethanol . 5...

  Very Short Answer Type Questions (VSATQs) with answers, suitable for Class 10 CBSE Chemistry (based on Carbon and Its Compounds chapter): 1. Write the molecular formula of ethanol. Answer: C₂H₅OH 2. What is the next higher homologue of methanol (CH₃OH)? Answer: Ethanol (C₂H₅OH) 3. Identify the functional group present in the following compound and name it according to IUPAC system: CH₃OH Answer: Functional group –OH (Hydroxyl group); IUPAC name: Methanol 4. Give the common name and IUPAC name of the simplest aldehyde. Answer: Common name: Formaldehyde IUPAC name: Methanal 5. What is the common name of methanal? Answer: Formaldehyde 6. Write the names of the following functional groups: (a) –C≡C– → Alkyne (b) –CO– (carbonyl group between two alkyl groups) → Ketone 7. Name the simplest ketone. Answer: Propanone (also known as acetone) 8. What is the common name of propanone? Answer: Acetone 9. Write the IUPAC names of the following: (i) CH₃COC...

   Very Short Answer Questions  with answers (1-mark each) from the Class 10 CBSE Science Chapter  "Carbon and its Compounds"  — based on the questions you've listed: 1. Name the element whose one of the allotropic forms is buckminsterfullerene. Answer:  Carbon. 2. What are the two properties of carbon which lead to the formation of a large number of carbon compounds? Answer:  Catenation and tetravalency. **3. State whether the following statement is true or false: “Diamond and graphite are the covalent compounds of carbon element (C).”** Answer:  True. 4. Name the scientist who disproved the 'vital force theory' for the formation of organic compounds. Answer:  Friedrich Wöhler. 5. Name the element whose allotropic form is graphite. Answer:  Carbon. 6. In addition to some propane and ethane, LPG cylinders contain mainly two isomers of another alkane. Name the two isomers and write their condensed structural formulae. Answer: n-butane ...

  Class 10 CBSE Science – Carbon and Its Compounds  as per the NCERT curriculum: 36. Diamond (a) What is diamond? Of what substance is diamond made? Answer: Diamond is an allotrope of carbon. It is a crystalline form in which each carbon atom is strongly bonded to four other carbon atoms in a tetrahedral structure. Thus, diamond is made up entirely of carbon atoms. (b) Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond. Answer: In diamond, each carbon atom is covalently bonded to four other carbon atoms in a tetrahedral arrangement. This structure extends in all directions, forming a rigid 3D network. This tight bonding makes diamond very hard and gives it a high melting point. Simple Diagram: C /|\ C C C | C (Note: In actual diagrams, it is shown as a 3D tetrahedral lattice.) (c) Explain why diamond has a high melting point. Answer: Diamond has a high melting point because of th...