The document contains questions and answers related to chemistry concepts. Specifically, it discusses s-block elements, their properties like atomic radius and ionization energy, and their reactions. It also addresses concepts like conductivity, reduction potentials, diagonal relationships on the periodic table, and factors that govern crown ether ligand binding to metal ions.

1. The s-block flip

2. Why share questions?
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• These questions have been
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3. Which is a true statement
about K and Rb
A. ΔH K(g)  K+(g) + e-
> ΔH Rb(g)  Rb+(g) + e-
B. Rb has more valence
electrons than K
C. The atomic radius of Sr
is closer to Rb than K
D. K has a larger atomic
radius

4. Which is
thermodynamically
favourable?
A. Li + e-  Li-
B. Li  Li+ + e-
C. Li-  Li + e-
D. Li- + e-  Li2-

5. Which of the following
components of air react with
lithium metal?
A. Argon
B. Water Vapour
C. Carbon Dioxide
D. Oxygen
E. Nitrogen Argon
W
aterVapourCarbon
Dioxide
Oxygen
Nitrogen
0 0 000

6. Which of the following
doesn’t conduct electricity
A. NaCl (s)
B. NaCl (l)
C. NaCl (aq)
D. Na (s)
NaCl(s)
NaCl(l)
NaCl(aq)
Na(s)
0% 0%0%0%

7. Given the following reduction potentials:
Mg2+/Mg -2.34; Ca2+/Ca -2.87; Sr2+/Sr -2.89;
Ba2+/Ba -2.90 how many of these metals
will react with water ?
A. 1
B. 2
C. 3
D. 4
0 000

8. Which pair of elements share a
diagonal relationship?
A. Magnesium and
potassium
B. Beryllium and
aluminium
C. Calcium and
aluminium
D. Lithium and
sodium
M
agnesium
and
potassium
Beryllium
and
alum
inium
Calcium
and
alum
inium
Lithium
and
sodium
0 000

9. What governs the strength of
the binding between a crown
ether ligand and a metal ion?
A. Size alone
B. Charge alone
C. Size and charge
D. Reduction
potential
Size
alone
Charge
alone
Size
and
chargeReduction
potential
0 000