Acids and Sour-Tasting Materials Quiz
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Questions and Answers

What gives sour taste to materials like lemon, vinegar, and tamarind?

  • Presence of salts
  • Presence of acids (correct)
  • Presence of alcohols
  • Presence of sugars

    • What is the origin of the term 'acid'?

  • Latin word 'acidus', meaning 'sour' (correct)
  • Arabic word 'asid', meaning 'bitter'
  • Greek word 'acidos', meaning 'tart'
  • Sanskrit word 'asidra', meaning 'astringent'

    • What is the basis for classifying substances and materials into different categories?

  • Colour, odour, taste, physical state, and other properties (correct)
  • Molecular weight and density
  • Electrical conductivity and magnetic properties
  • Chemical composition and atomic structure

    • What gives a bitter taste to materials like baking soda and soap?

    <p>Presence of bases</p> Signup and view all the answers

    What are acids prepared from minerals present in the earth called?

    <p>Mineral Acids</p> Signup and view all the answers

    What are the two categories of acids mentioned in the text?

    <p>Mineral Acids and Acids prepared from minerals present in the earth</p> Signup and view all the answers

    Why is it dangerous to taste any unknown substance?

    <p>It can be harmful and should be avoided, whether at home or in school</p> Signup and view all the answers

    What is the origin of the term 'acid'?

    <p>It has been derived from the Latin word 'acidus', which means 'sour'</p> Signup and view all the answers

    What are some materials that taste sour due to the presence of acids?

    <p>Lemon, vinegar, and tamarind</p> Signup and view all the answers

    What chemicals give a bitter taste to materials like baking soda and soap?

    <p>Bases</p> Signup and view all the answers

    What are mineral acids and give examples of mineral acids mentioned in the text?

    <p>Mineral acids are acids prepared from the minerals present in the earth. Examples mentioned in the text are hydrochloric acid (HCl), sulphuric acid (H2SO4), nitric acid (HNO3), sulphurous acid (H2SO3), and phosphoric acid (H3PO4).</p> Signup and view all the answers

    What properties are often used to classify substances and materials into different categories?

    <p>Properties such as color, odor, taste, physical state, and other properties are often used to classify substances and materials into different categories.</p> Signup and view all the answers

    Why is it dangerous to taste any unknown substance at home or in school?

    <p>It is dangerous to taste any unknown substance because some substances may contain harmful chemicals, and tasting unknown substances can lead to poisoning or other health risks.</p> Signup and view all the answers

    What is the origin of the term 'acid' and what does it mean?

    <p>The term 'acid' has been derived from the Latin word 'acidus,' which means 'sour.' All sour-tasting materials contain acids.</p> Signup and view all the answers

    What gives a sour taste to materials like lemon, vinegar, and tamarind, and what causes this taste?

    <p>Materials like lemon, vinegar, and tamarind taste sour due to the presence of chemicals called acids. Sour taste is caused by the presence of acids in these materials.</p> Signup and view all the answers

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