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p-Block Elements - 10 (Halogen Family)
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Q1. Among F, Cl, Br and I the lowest ionization potential will be of
*
1 point
Br
I
Cl
F
Q2. Among F, Cl, Br and I the highest ionization potential will be of
*
1 point
F
Cl
I
Br
Q3. The electronegativity follows the order
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1 point
Cl > F > O > Br
F > O > Cl > Br
F > Cl > Br > O
O > F > Cl > Br
Q4. The bond energies of F2 , Cl2, Br2 and I2 are 155, 244, 193and 151 kJ mol–1 respectively. The weakest bond will be in
*
1 point
F2
I2
Cl2
Br2
Q5. The outer electronic structure of 3s2 3p5 is possessed by
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1 point
I
Br
F
Cl
Q6. Electron gain enthalpy with negative sign of fluorine is lessthan that of chlorine due to
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1 point
Bigger size of 2p orbital of fluorine
Smaller size of chlorine atom
High ionization enthalpy of fluorine
Smaller size of fluorine atom
Q7. Which one of the following order is correct for the bond energies of halogen molecules ?
*
1 point
a
d
c
b
Q8. The correct order of reactivity of halogens with alkalies is
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1 point
F < Cl < Br > I
F > Cl > Br > I
F < Cl < Br < I
F < Cl > Br < I
Q9. The correct order of increasing oxidising power is
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1 point
a
d
c
b
Q10. Fluorine exhibits an oxidation state of only –1 because
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1 point
it can readily accept an electron
it is very strongly electronegative
it is a non-metal
it belongs to halogen family
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