Oxyacids of Phosphorus

Q. Which is the correct statement for the given acids?

1. Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
2. Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
3. Both are diprotic acids.
4. Both are triprotic acids.

Q.

Formic acid and acetic acid are distinguished by

1. ${\mathrm{NaHCO}}_3$

2. ${\mathrm{FeCl}}_3$

3. Victor Mayer test

4. Tollens reagent

Q.

68. Define basicity of an acid and acidity of a base. On the basis of these, explain the classification of acids and bases. Give suitable examples.

Q. Strong reducing behaviour of $H_{3}P{O}_2$ is due to

1. high electron gain enthalpy of phosphorus
2. high oxidation state of phosphorus
3. presence of two - OH groups and one P - H bond
4. presence of one - OH group and two P - H bonds.

Q.

Detergents are ammonium or sulphonate salts of long chain _________.

1. Aldehydes

2. Ketones

3. Carboxylic acid

4. Sulphonic acid

Q.

194. Acetic acid is a weak acid and ammonia is a weak base. Discuss the term ‘weak’.

Q.

Which of these have inter-molecular hydrogen bond?

1. 

2. 

3. 

4. 

Q. $H_{3}P{O}_2$ is the molecular formula of an acid of phosphorus, Its name and basicity respectively are

1. phosphorous acid and two
2. hypophosphorous acid and two
3. hypophosphorous acid and one
4. hypophosphoric acid and two

Q.

which is the weakest acid ever?

Q. What is dibasic acid ??

Q.

What happens when ethanoic acid reacts with sodium carbonate. Give a balanced chemical equation and write the name of the reactants and products.

Q. A waxy white solid is burnt in air (with an excess supply of air) in an extraordinarily exothermic reaction. The product of this reaction rapidly undergoes complete hydrolysis to yield an acid X. The acid X is:

1. Hypophosphorus acid
2. Phosphorous acid
3. Fluorapatite or Phosphorite
4. Orthophosphoric acid

Q.

Which of them are not monobasic acid?

1. Nitric acid

2. Hydrochloric acid

3. Carbonic acid

4. Hydrobromic acid

Q. Nature of aqueous solutions of two different amino acids X and Y are acidic and basic, respectively. X and Y can be:

1. Alanine and valine
2. Aspartic acid and Asparagine
3. Glutamine and Glutamic acid
4. Aspartic acid and Lysine

Q. Orthophosphoric acid is a __-basic acid.

Q. The basicity of $H_{3}P{O}_2$ is ___

Q. is boric acid a weak bronsted acid?

Q.

$Othophosphoricacid\underset{{220}^{\circ }C}{\overset{gentleheat}{\to }}X$.

What is(are) correct about X?

1. It is tetrabasic.

2. It contains one $P-O-P$ bond.

3. It is dibasic.

4. On hydrolysis, it produces metaphosphoric acid.

Q. Concentrated orthophosphoric acid is a syrupy, viscous liquid and this is due to __ bonding.

Q. What are hetrocyclic amino acids , Are they basic??

Q. ______ bond is formed by the transfer of an electron from atom A to atom B.

1. Atomic
2. Ionic
3. Covalent
4. Molecular

Q. The pair in which phosphorous atoms have a forms have a formal oxidation state of +3 is:

1. Pyrophosporous and hypophosphoric acids
2. Orthophsphorus and pyrophosporus acids
3. Pyrophosporous and hypophosphoric acids
4. Orthophsphorus and hypophosphoric acids