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UP Board Class 10 Chemical Reactions and Equations — practice questions

Explore 30 free Chemical Reactions and Equations questions in UP Board Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Chemical Reactions and Equations questions and exercises with answers

Showing questions 1–30 of 30.

How many valence electrons does a carbon atom have?Read the answer and worked solution →Reaction of CH₄ with Cl₂ in sunlight to give CH₃Cl is an example of:Read the answer and worked solution →A series of compounds in which successive members differ by a –CH₂– unit is called a:Read the answer and worked solution →Pentane and isopentane share the formula C₅H₁₂ but differ in their carbon arrangement. They are:Read the answer and worked solution →Which is the bond pattern of nitrogen molecule N2?Read the answer and worked solution →The addition of hydrogen to an unsaturated hydrocarbon to form a saturated one uses a catalyst of:Read the answer and worked solution →In alkaline KMnO₄, ethanol is converted to:Read the answer and worked solution →Why does carbon form covalent rather than ionic bonds?Read the answer and worked solution →Which is an allotrope of carbon?Read the answer and worked solution →The general formula of an alkane is:Read the answer and worked solution →The chemical reaction where alcohol and carboxylic acid form a fruity-smelling ester is called:Read the answer and worked solution →Diamond conducts heat well but does NOT conduct electricity because:Read the answer and worked solution →Graphite is soft and a good conductor of electricity because:Read the answer and worked solution →How can ethanol be converted to ethene?Read the answer and worked solution →Diamond and graphite differ because they are:Read the answer and worked solution →Carbon forms bonds by:Read the answer and worked solution →Which property of carbon allows it to form long chains?Read the answer and worked solution →The reaction of an alcohol with a carboxylic acid in the presence of an acid catalyst, forming a sweet-smelling ester, is called:Read the answer and worked solution →Which of the following pairs are members of the same homologous series?Read the answer and worked solution →Hydrocarbons in which carbon atoms are joined only by single bonds are said to be:Read the answer and worked solution →The general formula for the alkane series is:Read the answer and worked solution →Compounds having the same molecular formula but different structures are called:Read the answer and worked solution →Why do soaps NOT work well in hard water?Read the answer and worked solution →Which of the following is an unsaturated hydrocarbon?Read the answer and worked solution →The common name of ethanoic acid, a dilute solution of which is called vinegar, is:Read the answer and worked solution →The flame produced when a saturated hydrocarbon burns in plentiful air is:Read the answer and worked solution →A soap molecule cleans greasy clothes mainly because:Read the answer and worked solution →The functional group present in alcohols is:Read the answer and worked solution →The functional group present in carboxylic acids is:Read the answer and worked solution →Which functional group is present in ethanoic acid?Read the answer and worked solution →

Worked practice questions

How many valence electrons does a carbon atom have?

  1. Four
  2. Two
  3. Six
  4. Eight
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Correct answer: A. Four

1. Carbon has atomic number 6 with electronic configuration 2, 4. 2. The outermost shell holds four electrons. 3. These four valence electrons let carbon form four covalent bonds. 4. So the answer is four. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_

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Reaction of CH₄ with Cl₂ in sunlight to give CH₃Cl is an example of:

  1. a substitution reaction
  2. an addition reaction
  3. a combination reaction
  4. an oxidation reaction
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Correct answer: A. a substitution reaction

A hydrogen atom in saturated methane is replaced by a chlorine atom. That is a substitution reaction — the typical mode for saturated compounds.

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A series of compounds in which successive members differ by a –CH₂– unit is called a:

  1. periodic series
  2. reactivity series
  3. homologous series
  4. isomeric series
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Correct answer: C. homologous series

A homologous series has members differing by –CH₂– with similar chemical properties.

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More Chemistry topics

Elements, Compounds and Mixtures