Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only ?
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What are isoelectronic ions? Account for the decrease in size of following species oxide ion > Fluoride ion > sodium ion > magnesium ion.
The ions having same number of electrons are called isoelectronic ions. The above order is due to increasing order of effective nuclear charge.
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Elements of group 14 (a) exhibit oxidation state of +4 only (b) exhibit oxidation state of +2 and +4
(b)The elements of group 14 have 4 valence electrons. Therefore, the oxidation state of the group is +4. However, as a result of the inert pair effect, the lower oxidation...
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Why is the reduction of a metal oxide easier if metal formed is in liquid state at the temperature of reduction ?
[Hint : Entropy is more positive when the metal is in liquid state as compared with solid state, so AG becomes more ve.]
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In group 16, the stability of + 6 oxidation state decreases and that of + 4 oxidation state increases down the group. Why
[Hint : Due to inert pair effect.]
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Fluorine exhibit only - 1 oxidation state whereas other halogens exhibit +ve oxidation
[Hint : Due to absence of vacant d-orbitals in the octet of F.]
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What are the different oxidation states exhibited by the lanthanoids?
In the lanthanide series, +3 oxidation state is most common i.e., Ln(III) compounds are predominant. However, +2 and +4 oxidation states can also be found in the solution or in...
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Ammonia on catalytic oxidation gives an oxide from which nitric acid is obtained. The oxide is : (a) N2O3
(c) [Fe(H2O)5NO]2+ ion is formed
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The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder
It is of which chapter
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The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder
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Although the H-bonding in hydrogen fluoride is much stronger than that in water, yet water has a much higher boiling point than hydrogen fluoride.
This is because hydrogen bonding is multidimensional in water whereas in HF it is linear.
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