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Uttarakhand Board Class 10 Carbon and its Compounds — practice questions — page 2

Explore 68 free Carbon and its Compounds questions in Uttarakhand Board Class 10 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 31–60 of 68.

Which of the following is an unsaturated hydrocarbon?Read the answer and worked solution →Why are the chemical properties of all members of a homologous series similar?Read the answer and worked solution →Which of these reactions is a substitution reaction?Read the answer and worked solution →Identify the product of the reaction: 2C2H5OH + 2Na ->Read the answer and worked solution →How can ethanol be converted to ethene?Read the answer and worked solution →Which is the bond pattern of nitrogen molecule N2?Read the answer and worked solution →Which is NOT an allotrope of carbon?Read the answer and worked solution →Esterification reaction is usually carried out in the presence of:Read the answer and worked solution →How many isomers exist for the molecular formula C4H10?Read the answer and worked solution →On reacting 50 mL ethanol with excess conc. H2SO4 at 443 K, the main product is:Read the answer and worked solution →Why does graphite act as a lubricant?Read the answer and worked solution →Soap molecules in water form micelles because:Read the answer and worked solution →Identify the product of the reaction of ethanoic acid with sodium hydroxide:Read the answer and worked solution →Why does ethanoic acid freeze in winter (called glacial acetic acid)?Read the answer and worked solution →Which contains both saturated and unsaturated bonds?Read the answer and worked solution →Which alkane is added to LPG to make it detectable through smell?Read the answer and worked solution →A molecule of ammonia (NH₃) hasRead the answer and worked solution →Buckminsterfullerene is an allotropic form ofRead the answer and worked solution →Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example ofRead the answer and worked solution →In which of the following compounds, — OH is the functional group?Read the answer and worked solution →The soap molecule has aRead the answer and worked solution →Which of the following is the correct representation of electron dot structure of nitrogen?Read the answer and worked solution →Structural formula of ethyne isRead the answer and worked solution →Identify the unsaturated compounds from the following (i) Propane (ii) Propene (iii) Propyne (iv) ChloropropaneRead the answer and worked solution →Chlorine reacts with saturated hydrocarbons at room temperature in theRead the answer and worked solution →Pentane has the molecular formula $\mathrm{C}_{5} \mathrm{H}_{12}$. It hasRead the answer and worked solution →Ethanol reacts with sodium and forms two products. These areRead the answer and worked solution →Vinegar is a solution ofRead the answer and worked solution →The correct electron dot structure of a water molecule isRead the answer and worked solution →Which of the following does not belong to the same homologous series?Read the answer and worked solution →

Worked practice questions

Which of the following is an unsaturated hydrocarbon?

  1. Methane (CH4)
  2. Propane (C3H8)
  3. Ethene (C2H4)
  4. Butane (C4H10)
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Correct answer: C. Ethene (C2H4)

1. Saturated hydrocarbons have only C-C single bonds. 2. Methane, propane and butane are alkanes (CnH(2n+2)). 3. Ethene has a C=C double bond (C2H4) and follows CnH(2n). 4. So ethene is the unsaturated hydrocarbon here. 5. The double bond makes it more chemically reactive than alkanes. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_

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Why are the chemical properties of all members of a homologous series similar?

  1. They have the same molecular mass
  2. They are all gases
  3. They have the same melting point
  4. They share the same functional group
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Correct answer: D. They share the same functional group

1. A homologous series is built around one functional group. 2. Members differ only by a -CH2- unit. 3. The functional group determines chemical behaviour. 4. Identical functional groups give identical chemical properties. 5. Physical properties such as melting point change with chain length. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_

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Which of these reactions is a substitution reaction?

  1. CH4 + Cl2 -> CH3Cl + HCl (in sunlight)
  2. C2H4 + H2 -> C2H6 (with Ni)
  3. CH3OH + Na -> CH3ONa + 1/2 H2
  4. CH3COOH + NaOH -> CH3COONa + H2O
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Correct answer: A. CH4 + Cl2 -> CH3Cl + HCl (in sunlight)

1. Substitution means one atom in a molecule is replaced by another. 2. In CH4 + Cl2 -> CH3Cl + HCl, a hydrogen atom is replaced by chlorine. 3. Option B is addition across a double bond. 4. Option C is a metal-acid type reaction; option D is acid-base neutralisation. 5. So option A is the substitution reaction. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_

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More Chemistry topics

Periodic Classification of ElementsMetals and Non-metalsAlcohols Phenols EthersAldehydes KetonesAlkenesChemical EquilibriumClassification of Elements and PeriodicityClassification of Elements and Periodicity in Properties