Ch. 1 S And P Block Elements (Topic 13.2 And 13.3)

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Ch. 1 S And P Block Elements (Topic 13.2 And 13.3) - Quiz


Questions and Answers
  • 1. 
    The ionic radii of alkali metals will ___________ as we move down the group
    • A. 

      Decrease

    • B. 

      Increase

    • C. 

      Remain same

    • D. 

      First increase then decrease

  • 2. 
    Why is the second ionization energy grater than first ionization energy? 
    • A. 

      Because electron is weakly held

    • B. 

      Distance of electron from the nucleus increases

    • C. 

      Because of inert pair effect

    • D. 

      Because of increasing nuclear pull

  • 3. 
    The electronegativity value of fluorine is 
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      5

  • 4. 
    The property of alkali metals to give colouration in the burner flame has been used to detect their presence in salts by a test, known as
    • A. 

      Slat analysis 

    • B. 

      Chemical test

    • C. 

      Flame test

    • D. 

      Colour test

  • 5. 
    The melting and boiling points of alkali metals  are very low because of the presence of
    • A. 

      Weak inner atomic bonds in the solid state of the alkali metals

    • B. 

      Weak Vander Waal's forces in the solid state of the alkali metals

    • C. 

      Weak inner ionic bonds in the solid state of the alkali metals

    • D. 

      Weak covalent bonds in the solid state of the alkali metals

  • 6. 
    The densities of alkali metals are quite low due to
    • A. 

      The large atomic volume

    • B. 

      The large atomic size

    • C. 

      The large atomic radii

    • D. 

      All of theseĀ 

  • 7. 
    Which alkali metal is comparitively harder?
    • A. 

      Cs

    • B. 

      Rb

    • C. 

      K

    • D. 

      Li

  • 8. 
    Which alkali metal nitrate decomposes on heating?
    • A. 

      NaNO3

    • B. 

      LiNO3

    • C. 

      KNO3

    • D. 

      RbNO3

  • 9. 
    Chemical formula of sodium nitrite is;
    • A. 

      NaNO3

    • B. 

      NaNO

    • C. 

      NaNO2

    • D. 

      Na2NO2

  • 10. 
    Which concentrated is used to carry out flame test?
    • A. 

      H2SO4

    • B. 

      HNO3

    • C. 

      H3PO4

    • D. 

      HCl

  • 11. 
    Rb burns with _____________flame 
    • A. 

      Red 

    • B. 

      Reddish-violet

    • C. 

      Lilac

    • D. 

      Both a and b

  • 12. 
    Golden - yellow flame colour is shown by; 
    • A. 

      Cu

    • B. 

      Ba

    • C. 

      Na

    • D. 

      Li

  • 13. 
    Formula of barium peroxide is;
    • A. 

      Ba2O

    • B. 

      BaO2

    • C. 

      Ba2O2

    • D. 

      BaO

  • 14. 
    Which nitride is volatile? 
    • A. 

      Be3N2

    • B. 

      Mg3N2

    • C. 

      Ca3N2

    • D. 

      Sr3N2

  • 15. 
    Which gas is evolved when metal carbonates are decomposed?
    • A. 

      Oxygen

    • B. 

      Hydrogen

    • C. 

      Carbon dioxide

    • D. 

      Nitrogen

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