Oxyacids of Phosphorus

Q. Q.11.How many grams of 80% pure Na2SO4 can be produced from 130 gm of 90% pure NaCl ?

Q. 29. Find Acidic order: 1) carboxylic acid 2) picric acid 3) sulphonic acid

Q. Which of the following is most acidic? (a)picric acid (b)formic acid (c)benzoic acid (d)acetic acid

Q.

Which of the following is a correct statement?

1. All Bronsted bases are Arrhenius bases.

2. All Lewis bases are Arrhenius bases.

3. All Bronsted acids are Arrhenius acids.

4. All Lewis acids are Arrhenius acids.

Q.

Conditions of Hydrogen and Chlorine to combine with :

1. Heat

2. Sunlight

3. Catalyst

4. Pressure

Q.

What kind of molecule is AlCl₃?

1. Bronsted Acid

2. Lewis Acid

3. Bronsted base

4. Lewis base

Q. amaong the following which has longest c-o bond? a) hcho.b)hcof.c)hconh2)d) hcoo

Q. Vitamin k5 contains 76.27%carbon by mass and has a molecular mass 173.21g/mol . How many carbon atoms are in one mole k5 molecule.

Q.

Among the following species, identify the isostructural pairs,
$N{F}_3,N{O}_3^{-},B{F}_3,H_3{O}^{+},H{N}_3$

1. 

2. 

3. 

4. 

Q. In a cyclotrimetaphosphoric acid molecule, how many pi and sigma bonds are present?

1. 3 pi bonds; 9 sigma bonds
2. 6 pi bonds; 6 sigma bonds
3. 3 pi bonds; 15 sigma bonds
4. 3 pi bonds; 12 sigma bonds

Q. WHY HCLO4 is strongest acid in the world and y not other acid / what makes it much acidic all other acids

Q. When Phosphorus Pentoxide undergoes complete hydrolysis the acid formed is:

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

Q. the hardness of water is caused by; a. all of the these b. Mg(HCo3)2 c. CaCl2 d. CaSo4

Q. 26.What are organic acid

Q. Classify the following as Lewis acid or Lewis base
H⁺, H₂O, NH₃, BF₃, Al³⁺, BeCl₂, Cl^-

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. Why boric acid is an acid although its formula is B(OH)3 ?

Q. How to determine the strength of lewis acids or bases?

Q.

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH^– (b) F^– (c) H⁺ (d) BCl₃.

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

Q. How phosphorous acid has basicity of 2 although it has 3 hydrogen ions?

Q. Q104) Among FeS04 7H20 (A), CuSO.5H2O (B)ZnSO4 7H2O (C), MnSO44H2(D), isomorphous\lbrack DPMT 2003\rbrack salts area) A and C b) A and D c) C and B

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

Q. Orthophosphoric acid is completely ioinised in _____steps.

1. 1
2. 2
3. 3
4. 4

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. $4HN{O}_3+P_4{O}_{10}\stackrel{-10{}^{o}C}{\to }+2N_2{O}_5+(HP{O}_3{)}_4$
Find out the value of expression $|x-y|$ for above reaction
where, x = maximum number of eaqual $N-O$ bond length in $N_2{O}_5$.
y = Difference of oxy linkages (P - O - P) between $P_4{O}_{10}$ and $(HP{O}_3{)}_4$.

Q. What is the wieght of availabe oxygen from a solution of hydrogen peroxide, if 20 ml of this solution needs 25ml of0.05N of KMnO4 for complete oxidation

Q. Why is the basicity of Boric Acid 1, although we have three replaceable hydrogen ions?

Q. All bronsted bases are also lewis bases but all the bronsted acids are not lawis acids

Q.

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH^– (b) F^– (c) H⁺ (d) BCl₃.