Self Studies

The p-Block Elements Test - 27

Result Self Studies

The p-Block Elements Test - 27
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Fluorine is highly reactive because:
    Solution
    F2F_{2} is highly reactive because of its low bond energy. Also, it has the highest electronegativity.
  • Question 2
    1 / -0
    Assertion (A): Balloons made by nylon films are better for containing helium than the conventional rubber balloons. 
    Reason (R): R.M.S. velocity of helium is very high. So helium atoms can effuse out through rubber balloons.
    Solution
    Root mean square velocity of helium gas is high due to its low mass.  
    RMS velocity× 1massRMS velocity \times \frac{1}{mass}
    Therefore, nylon films are better for containing helium than the conventional rubber balloons.
  • Question 3
    1 / -0
    The atomic number of astatine which belongs to the sixth period is:
    Solution
         He (2)
    F   Ne (10)
    Cl  Ar (18)
    Br  kr (36)
    I     xe (54)
    As  Rn (86)
    Since the position of astatine is just before the Rn.
    so atomic no of astatine is 85
  • Question 4
    1 / -0
    What is the atomic number (Z) of the noble gas that reacts with fluorine?
    Solution
    He(2)
    Ne(10)
    Ar(18)
    Kr(36)
    Xe(54)

    Xe reacts with F2F_{2}

    Its atomic no. is 54

    Option A is correct.
  • Question 5
    1 / -0
    The inert gas which cannot be adsorbed over activated coconut charcoal?
    Solution
    Due to small size of helium, it can not be absorbed over activated coconut charcoal.

    Option C is correct.
  • Question 6
    1 / -0
    Which of the following exhibits the weakest intermolecular forces?
    Solution
    He has maximum ionization energy. So it has least tendency

    to combine and has weakest intermolecular forces.
  • Question 7
    1 / -0
    The correct order of enthalpy of vaporisation of noble gases is :
    Solution
    Enthalpy of vaporization α\alpha Van der Waals forces α\alpha Molar mass
    Thus, as molar mass increases, the enthalpy of vaporization increases.
    Thus correct order of enthalpy of vapourisation of noble gases 
    Xe>Kr>Ar>Ne>HeXe>Kr>Ar>Ne>He
  • Question 8
    1 / -0
    The atomic weight of noble gases is obtained by using the relationship :
    Solution
    For Noble gases
    Molecularweight=Atomicweight\underset{weight}{Molecular} = \underset{weight}{Atomic}
    VapourDensity=Atomic weight2\underset{Density}{Vapour} = \frac{Atomic  weight}{2}
    2×U.D=molecular weight\therefore 2\times U.D = molecular  weight
    =atomic weight = atomic  weight




  • Question 9
    1 / -0
    Clathrates are_________
    Solution
    Clathrates compound are non-stoichiometric in nature. 

    They have a host molecule which could be a organic or inorganic compound while the guest molecule is inert gases.

    Option B is correct.
  • Question 10
    1 / -0
    The most abundant element in the earth's crust among the following is_________.
    Solution
    The most abundant element in the earth's crust is phosphorus. It occurs in the minerals of the apatite family. An example is a fluorapatite Ca9[PO4]6CaF2 \displaystyle Ca_9[PO_4]_6 \cdot CaF_2 
    Phosphorus is the most abundant element of 15th group, accounting for 0.10% of the mass of the earth's crust.
    Option A is correct.
Self Studies
User
Question Analysis
  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now