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H3PO2 is the molecular formula of an acid of phosphorus. Its name and basicity respectively are[1992]
- a)Phosphorus acid and two
- b)Hypophosphorous acid and two
- c)Hypophosphorous acid and one
- d)Hypophosphoric acid and two
Correct answer is option 'C'. Can you explain this answer?
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H3PO2 is the molecular formula of an acid of phosphorus. Its name and ...
H3PO2 is named as hypophosphorous acid.
As it contains only one P – OH group, its basicity is one.
As it contains only one P – OH group, its basicity is one.
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H3PO2 is the molecular formula of an acid of phosphorus. Its name and ...
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H3PO2 is the molecular formula of an acid of phosphorus. Its name and ...
Hypophosphorous acid and one
Explanation:
H3PO2 is the molecular formula for an acid of phosphorus. To determine the name and basicity of this acid, we need to understand the rules for naming acids.
Naming Acids:
When naming an acid, we consider the anion that the acid forms when it dissociates in water. The naming of acids depends on the ending of the anion. Let's break down the process step by step:
1. If the anion ends in "-ide," the acid is named with the prefix "hydro-" and the suffix "-ic." For example, HCl forms the chloride anion, so it is named hydrochloric acid.
2. If the anion ends in "-ate," the acid is named with the suffix "-ic." For example, H2SO4 forms the sulfate anion, so it is named sulfuric acid.
3. If the anion ends in "-ite," the acid is named with the suffix "-ous." For example, H2SO3 forms the sulfite anion, so it is named sulfurous acid.
Analysis:
In the given molecular formula H3PO2, the anion formed when it dissociates in water is PO2^3-. The anion does not end in "-ide," "-ate," or "-ite," so it does not fit into the first three naming rules.
The acid formed by this anion is called hypophosphorous acid. The prefix "hypo-" indicates that the acid has one less oxygen atom compared to the "-ous" acid. In this case, the "-ous" acid would be phosphorous acid (H3PO3), but since it has one less oxygen atom, it becomes hypophosphorous acid (H3PO2).
Basicity:
The basicity of an acid is the number of replaceable hydrogen atoms present in one molecule of the acid. In this case, hypophosphorous acid (H3PO2) has one replaceable hydrogen atom, so its basicity is one.
Therefore, the correct answer is option C: Hypophosphorous acid and one.
Explanation:
H3PO2 is the molecular formula for an acid of phosphorus. To determine the name and basicity of this acid, we need to understand the rules for naming acids.
Naming Acids:
When naming an acid, we consider the anion that the acid forms when it dissociates in water. The naming of acids depends on the ending of the anion. Let's break down the process step by step:
1. If the anion ends in "-ide," the acid is named with the prefix "hydro-" and the suffix "-ic." For example, HCl forms the chloride anion, so it is named hydrochloric acid.
2. If the anion ends in "-ate," the acid is named with the suffix "-ic." For example, H2SO4 forms the sulfate anion, so it is named sulfuric acid.
3. If the anion ends in "-ite," the acid is named with the suffix "-ous." For example, H2SO3 forms the sulfite anion, so it is named sulfurous acid.
Analysis:
In the given molecular formula H3PO2, the anion formed when it dissociates in water is PO2^3-. The anion does not end in "-ide," "-ate," or "-ite," so it does not fit into the first three naming rules.
The acid formed by this anion is called hypophosphorous acid. The prefix "hypo-" indicates that the acid has one less oxygen atom compared to the "-ous" acid. In this case, the "-ous" acid would be phosphorous acid (H3PO3), but since it has one less oxygen atom, it becomes hypophosphorous acid (H3PO2).
Basicity:
The basicity of an acid is the number of replaceable hydrogen atoms present in one molecule of the acid. In this case, hypophosphorous acid (H3PO2) has one replaceable hydrogen atom, so its basicity is one.
Therefore, the correct answer is option C: Hypophosphorous acid and one.
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H3PO2 is the molecular formula of an acid of phosphorus. Its name and basicity respectively are[1992]a)Phosphorus acid and twob)Hypophosphorous acid and twoc)Hypophosphorous acid and oned)Hypophosphoric acid and twoCorrect answer is option 'C'. Can you explain this answer?
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