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Worksheetsp - Block elements
Total questions: 25
Worksheet time: 16mins
Bismuth forms stable compound in +3 state than in +5 state, because of the _ _ _ (3 words)
(a)
Ammonia is liquid while phosphine is a gas . Why?
Due to more molar mass ammonia has maximum van der wall force of attraction
Due to more molar mass, ammonia has less van der wall force of attraction
Due to the presence of inter molecular hydrogen bonding in ammonia
Due to the absence of hydrogen bonding in ammonia
Nitrogen cannot exhibit co valancy more than four due to
Presence of vacant d orbitals
Due to large size
Due to absence of vacant d orbitals
Due to inert nature
Among the hydrides of 15th group , which is strong reducing agent?
Ammonia
Phosphine
Arsine
Bismuthine
Ammonia is a Lewis base and act as complexing agent because
It accepts electron pair
It is neither electron pair donar or acceptor
It act as electron pair donar.
It exhibit covalency more than five
In group 15 elements as we move down the group
Non metallic character increase
Metallic character increase
Both
None the above
In groups 15 to 18, the poor shielding effect of d & f electrons are overcome by the increased shielding effect of the additional ________electrons.
s
p
d
f
2HClO2 + I2
HIO3 + Cl2
2HIO3 + Cl2
HIO3 + 2Cl2
2HIO3 + 2Cl2
2MnO2 + 2H2SO4
2MnSO4 +2H2O + O2
2MnSO4 +H2O + 2O2
2MnSO4 +3H2O + O2
MnSO4 +2H2O + O2
K2Cr2O7 + H2SO4 + 3H2SO3
K2SO4 + 3CrSO4 + 4H2O
K2SO4 + 2Cr2(SO4)3 + 4H2O
K2SO4 + 2CrSO4 + 4H2O
K2SO4 + Cr2(SO4)3 + 4H2O
2NH3 + NaOCl
N2H4 + NaCl + 2H2O
N2H6 + NaCl + H2O
N2H4 + NaCl + H2O
N2H6 + NaCl + 2H2O
2Na2S2O3 + I2
Na2S4O6 + 2NaI
NaS4O6 + 3NaI
Na2S4O6 + Na2I2
Na4S4O6 + 2NaI
Pb3O4 + 4HNO3
2Pb(NO3)2 + 2PbO2 + 2H2O
2Pb(NO3)4 + PbO2 + 2H2O
Pb(NO3)2 + PbO2 + 2H2O
2Pb(NO3)2 + PbO2 + 2H2O
The general electronic configuration of p-block elements is
ns1
ns2
ns2 np1–6
(n–1)s2 np1–6
pick the odd man out
In
Pb
Cl
Al
Choose the wrong statement
Some of the p-block elements show negative oxidation states also
Halogens gain two electrons to give a stable halide ion
Inert gases have ns2np6 configuration and hence more stable.
P block elements contains metalloids
The elements N, O, F readily forms hydrogen bonds due to their high
ionisation energy
electron affinity
electro negativity
atomic radius
When a gas changes iron(III) oxide to iron(II) oxide, the gas is
a combustible gas
a reducing agent
an inert gas
an oxidising agent
In a redox reaction, spectator ions...
become oxidised
become reduced
remain unchanged
What is the oxidizing agent of this reaction?
3Mg + N2 → Mg3N2
Mg
N2
Mg3N2
MgN
What is the reducing agent of this reaction?
2Al (s) + 6H+ (aq) → 2Al3+ (aq) + 3H2 (g)
H+
Al3+
Al
H2
Which of the following is the product of the reaction of aluminium and oxygen?
aluminium oxide.
Aluminium metal
aluminium ore
aluminium and oxygen
In which of the following reactions oxidation takes place?
Ca + O2 --> CaO
Na2O + H2O --> NaOH
Fe2O3 + CO --> Fe + CO2
All of the choices are oxidation reactions.
