{"id":22238,"date":"2024-01-11T17:34:17","date_gmt":"2024-01-11T12:04:17","guid":{"rendered":"https:\/\/apboardsolutions.in\/?p=22238"},"modified":"2024-01-12T16:22:02","modified_gmt":"2024-01-12T10:52:02","slug":"ap-inter-2nd-year-chemistry-important-questions-chapter-1","status":"publish","type":"post","link":"https:\/\/apboardsolutions.in\/ap-inter-2nd-year-chemistry-important-questions-chapter-1\/","title":{"rendered":"AP Inter 2nd Year Chemistry Important Questions Chapter 1 Solid State"},"content":{"rendered":"

Students get through AP Inter 2nd Year Chemistry Important Questions<\/a> 1st Lesson Solid State which are most likely to be asked in the exam.<\/p>\n

AP Inter 2nd Year Chemistry Important Questions 1st Lesson Solid State<\/h2>\n

Very Short Answer Questions<\/span><\/p>\n

Question 1.
\nWhat is meant by the term coordination number ?
\nAnswer:
\nThe number of nearest neighbouring particles of a particle is defined as the co-ordination number.
\n(Or)
\nThe number of nearest oppositely charged ions surrounding a particular ion is also called as co-ordination number.
\nE.g.: Co-ordination no. of Na+<\/sup> in NaCl lattice is ‘6’.<\/p>\n

Question 2.
\nWhat is the co-ordination number of atoms in a cubic close – pack structure ?
\nAnswer:
\nThe co-ordination number of atoms in a cubic close pack structure is ’12’.<\/p>\n

\"AP<\/p>\n

Question 3.
\nWhat is the co-ordination number of atoms in a body – centered cubic structure ?
\nAnswer:
\nThe co-ordination number of atoms in a body – centered cubic structure is ‘8’.<\/p>\n

Question 4.
\nHow do you distinguish between crystal lattice and unit cell ? [Board Model Paper]
\nAnswer:
\nCrystal lattice : A regular arrangement of the constituent particles of a crystal in the three dimensional space is called crystal lattice.
\nUnit cell: The simple unit of crystal lattice which when repeated again and again gives the entire crystal of a given substance is called unit cell.<\/p>\n

Question 5.
\nWhat is Schottky defect ? [A.P. IPE 2015]
\nAnswer:
\nSchottky defect:<\/p>\n

    \n
  1. “It is a point defect in which an atom or ion is missing from its normal site in the lattice”.<\/li>\n
  2. In order to maintain electrical neutrality, the number of missing cations and anions are equal.<\/li>\n
  3. This sort of defect occurs mainly in highly ionic compounds, where cationic and anionic sizes are similar.
    \nIn such compounds the co-ordination number is high.
    \nEx.: NaCl, CsCl etc.<\/li>\n
  4. Illustration :
    \n\"AP<\/li>\n
  5. This defect decreases the density of the substance.<\/li>\n<\/ol>\n

    Question 6.
    \nWhat is Frenkel defect ? [A.P. IPE 2015]
    \nAnswer:
    \nFrenkel defect:<\/p>\n

      \n
    1. “It is a point defect in which an atom or ion is shifted from its normal lattice position”. The ion or the atom now occupies an interstitial position in the lattice.<\/li>\n
    2. This type of a defect is favoured by a large difference in sizes between the cation and anion. In these compounds co-ordination number is low.
      \nE.g.: Ag – halides, ZnS etc.<\/li>\n
    3. Illustration :
      \n\"AP<\/li>\n
    4. Frenkel defect do not change the density of the solids significantly.<\/li>\n<\/ol>\n

      \"AP<\/p>\n

      Question 7.
      \nWhat are f – centers ?
      \nAnswer:<\/p>\n