Chemistry Ch. 13 S And P Block Elements

15 Questions | Total Attempts: 51

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Chemistry Ch. 13 S And P Block Elements


Questions and Answers
  • 1. 
    On of the following alkali metals is most reactive. which is that?
    • A. 

      Ca

    • B. 

      Cs

    • C. 

      Na

    • D. 

      Mg

  • 2. 
    Elements of Group I - A give colours in flame. it is due to their;
    • A. 

      Low melting point

    • B. 

      Softness

    • C. 

      Single electron in the outer most orbit

    • D. 

      Low ionization energy

  • 3. 
    One of the following statements regarding alkali metals is not correct. indicate that. 
    • A. 

      The hydroxides are alkaline in nature

    • B. 

      They belong to s-block of periodic table

    • C. 

      Alkali metals are very reactive

    • D. 

      They form carbonates which decompose on heating 

  • 4. 
    Measure of the tendency of an atom to attract  a bonding pair of electron is called 
    • A. 

      Ionization energy 

    • B. 

      Electron affinity

    • C. 

      Electronegativity

    • D. 

      Atomic radius

  • 5. 
    The atomic radii decrease as we move from left to right in a period. This is because; 
    • A. 

       number of electrons increase

    • B. 

      Number of neutrons increase

    • C. 

      Nuclear charge increase

    • D. 

      Atomic number increase

  • 6. 
    The most electronegative element fluorine has electronegativity value 4. Cs is least electronegative. what is its electronegativity value? 
    • A. 

      0.4

    • B. 

      0.2

    • C. 

      0.5

    • D. 

      0.7

  • 7. 
    Silicon is a;
    • A. 

      Good conductor

    • B. 

      Poor conductor

    • C. 

      Semiconductor

    • D. 

      Electrolyre

  • 8. 
    Sulfur burns with 
    • A. 

      Yellow flame

    • B. 

      Blue flame

    • C. 

      Green flame

    • D. 

      Red flame

  • 9. 
    Phosphorus burns with 
    • A. 

      White flame

    • B. 

      Yellow flame

    • C. 

      Red flame

    • D. 

      Green flame

  • 10. 
    What is the color of Aluminium chloride 
    • A. 

      White 

    • B. 

      Brown

    • C. 

      Purple

    • D. 

      Pale yellow

  • 11. 
    The nature of metallic oxides is
    • A. 

      Acidic

    • B. 

      Basic

    • C. 

      Neutral

    • D. 

      Amphoteric

  • 12. 
    Which of the trimeric formula represents sulfur tri-oxide?
    • A. 

      SO3

    • B. 

      S3O9

    • C. 

      S2O6

    • D. 

      S2O2

  • 13. 
    The formula of sodium hypochlorite is
    • A. 

      NaCl

    • B. 

      NaClO4

    • C. 

      NaClO3

    • D. 

      NaOCl

  • 14. 
    Which of the following form giant covalent oxide?
    • A. 

      Phosphorus (V) oxide 

    • B. 

      Carbon dioxide

    • C. 

      Silicon dioxide

    • D. 

      Sulfur trioxide

  • 15. 
    Aluminium hydroxide is ___________ in nature
    • A. 

      Acidic

    • B. 

      Alkaline 

    • C. 

      Neutral

    • D. 

      Amphoteric

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