Carbon and Its Compounds - Very Short Answer Based Questions (VSQA)
Class 10 - Chemistry
Very Short Answer Based Questions (VSQA)
Q1: Define catenation.
Answer: The property of a carbon atom to link with other carbon atoms is known as catenation.
Q2: What is isomerism? .
Answer: Isomerism is a phenomenon in which compounds have the same molecular formula but different structural formula. ;
Q3: What are hydrocarbons?
Answer: The compounds containing carbon and hydrogen are known as hydrocarbons. For example, methane (CH₄).
Q4: Name the element whose one of the allotropic forms is buckminsterfullerene.
Answer : Carbon
Q5: Which of the following are called alkanes?
CH₄, C₃H₈, C₄H₈, C₅H₈
Answer: CH₄ and C₃H₈ are alkanes as they are satisfy the formula CnH2n+2.
Q6: Name the black substance of pencil. Will the current flow through the electrical circuit when we use the sharpened ends of the pencil to complete the circuit ?
Answer: Graphite. Yes, current will flow through the circuit since graphite is a good conductor of electricity.
Q7: What is the general formula of alkene and alkynes?
Answer: Alkene: CnH2n
Alkyne: CnH2n-2
Q8: Write the formula of alkane with 58 hydrogen atoms.
Answer: CnH2n+2
∴ 2n +2 = 58 and n= 28
The formula of alkane with 58 hydrogen atoms is C₂₈H₅₈.
Q9: Write the IUPAC names of the following :
(i) CH₃COCH₃
(ii) CH₃COCH₂CH₃
Answer:
(i) Propanone
(ii) Butanone
Q10: What happens when methane is burnt in air?
Answer: Methane burns in air with the formation of carbon dioxide and water.
CH₄ +2O₂ ---- → CO₂ +2H₂O + Heat
Q11: Write the formulae of methanoic acid.
Answer: Methanoic acid: HCOOH
Q12: ‘What is the molecular formula of alcohol which is derived from pentane?
Answer: Pentane: C₅H₁₂
The alcohol is pentanol: C₅H₁₁OH
Q13: What is meant by a functional group?
Answer: An ‘atom’ or ‘a group of atoms’ which makes a carbon compound (or organic compound) reactive and decides its properties (or functions) is called a functional group.
Q14: Name the three allotropes of carbon.
Answer:
(i) Diamond,
(ii) Graphite,
(iii) Buckminsterfullerene
Q15: Why does carbon form compounds mainly by covalent bonding?
Answer: Carbon atoms can achieve the inert gas electron arrangement only by the sharing of electrons, therefore, carbon always forms covalent bonds.
Q16: Name the gas evolved when ethanoic acid is added to sodium carbonate.
Answer: Carbon dioxide (CO₂) gas.
Q17: Name the product formed when hydrogen is added to ethene.
Answer: Ethane is formed when hydrogen is added to ethene. (Hydrogenation).
Q18: The sodium salt of a long chain fatty acid is called _________.
Answer: Soap
Q19: Why do use of synthetic detergents cause pollution of water?
Answer: In general, synthetic detergents are not bio-degradable, that is they cannot be decomposed by micro organisms like bacteria and hence cause water pollution.
Q20: Name the functional group present in propanal.
Answer: -CHO
👉See also:
Ch 4 - Carbon & Its Compounds (Short Q & A)
Ch 4 - Carbon & Its Compounds (Q & A)
Ch 4 - Carbon & Its Compounds (MCQs)
Ch 4 - Carbon & Its Compounds (Eduvictors' Quiz)
Ch 4 - Soaps and Detergents
Ch 4 - Carbon & Its Compounds (Important Points To Memorise)
Ch 4 - Carbon and Its Compounds (PDF Notes)
Ch 4 - Carbon & Its Compounds (Q & A)
Ch 4 - Carbon & Its Compounds (MCQs)
Ch 4 - Carbon & Its Compounds (Eduvictors' Quiz)
Ch 4 - Soaps and Detergents
Ch 4 - Carbon & Its Compounds (Important Points To Memorise)
Ch 4 - Carbon and Its Compounds (PDF Notes)
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