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UP Board Class 10 Periodic Classification of Elements — practice questions — page 2

Explore 50 free Periodic Classification of Elements questions in UP Board Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Periodic Classification of Elements questions and exercises with answers

Showing questions 31–50 of 50.

Mendeleev predicted the existence of an element he called eka-silicon, later identified as:Read the answer and worked solution →Upto which element, the Law of Octaves was found to be applicableRead the answer and worked solution →According to Mendeleev's Periodic Law, the elements were arranged in the periodic table in the order ofRead the answer and worked solution →Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?Read the answer and worked solution →An element which is an essential constituent of all organic compounds belongs toRead the answer and worked solution →Which of the following is the outermost shell for elements of period 2?Read the answer and worked solution →Which one of the following elements exhibit maximum number of valence electrons?Read the answer and worked solution →Which of the following gives the correct increasing order of the atomic radii of O, F and N?Read the answer and worked solution →Which among the following elements has the largest atomic radii?Read the answer and worked solution →Which of the following elements would lose an electron easily?Read the answer and worked solution →Which of the following elements does not lose an electron easily?Read the answer and worked solution →Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, AlRead the answer and worked solution →Arrange the following elements in the order of their increasing non-metallic character Li, O, C, Be, FRead the answer and worked solution →What type of oxide would Eka-aluminium form?Read the answer and worked solution →Three elements B, Si and Ge areRead the answer and worked solution →Which of the following elements will form an acidic oxide?Read the answer and worked solution →Which one of the following does not increase while moving down the group of the periodic table?Read the answer and worked solution →On moving from left to right in a period in the periodic table, the size of the atom.Read the answer and worked solution →Which of the following set of elements is written in order of their increasing metallic character?Read the answer and worked solution →Line up three from one familyRead the answer and worked solution →

Worked practice questions

Mendeleev predicted the existence of an element he called eka-silicon, later identified as:

  1. Gallium
  2. Scandium
  3. Germanium
  4. Titanium
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Correct answer: C. Germanium

1. Mendeleev left gaps in his table for unknown elements. 2. He named them by adding 'eka' (Sanskrit for 'one') to a known element's name. 3. Eka-aluminium was later identified as gallium. 4. Eka-boron turned out to be scandium. 5. Eka-silicon was confirmed as germanium when Winkler discovered it in 1886. 6. So the answer is germanium. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

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Upto which element, the Law of Octaves was found to be applicable

  1. Oxygen
  2. Cobalt
  3. Calcium
  4. Potassium
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Correct answer: C. Calcium

This Periodic Classification of Elements item tests a core Chemistry concept. Correct answer: Calcium. _Source: syllabus Exemplar Science Class 10_

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According to Mendeleev's Periodic Law, the elements were arranged in the periodic table in the order of

  1. increasing atomic number
  2. decreasing atomic number
  3. decreasing atomic masses
  4. increasing atomic masses
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Correct answer: D. increasing atomic masses

This Periodic Classification of Elements item tests a core Chemistry concept. Correct answer: increasing atomic masses. _Source: syllabus Exemplar Science Class 10_

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