The incorrect statement regarding oxoacids of phosphorus is:

The protecting power of lyophilic colloidal sol is expressed in terms of:

1. Coagulation value

2. Gold number

3. Critical micelle concentration

4. Oxidation number

Sulphur trioxide can be obtained by which of the following reaction:

1. $CaS{O}_4+C\stackrel{∆}{\to }$

2. $F{e}_2(S{O}_4{)}_3\stackrel{∆}{\to }$

3. $S+H_{2}S{O}_4\stackrel{∆}{\to }$

4. $H_{2}S{O}_4+PC{l}_5\stackrel{∆}{\to }$

p_A and p_B are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution.
If X_A represents the mole fraction of component A, the total pressure of the solution will be:

1. Maleic acid

2. $\alpha$-amino acid

3. Lactic acid

4. Tartaric acid

Which of the following species contains three bond pairs and one lone pair around the central atom?

1. \(\text H_{2} \text O\)

2. \(\text{BF}_{3}\)

3. \(\text{NH}^-_2\)

4. \(\text{PCl}_{3}\)

Limiting molar conductivity of NH₄OH (i.e., ${\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{OH}\right)}^0$ is equal to -

1. ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0$

2. ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{Cl}\right)}^0$

3. ${\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{OH}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{Cl}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left(HCl\right)}^0$

4. ${\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{Cl}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^0$

Identify the pair of species having the same bond order:

1. O₂²⁻ and B₂

2. O₂⁺ and NO⁺

3. NO and CO

4. N₂ and O₂

Which of the following statement is false?

1.Artificial silk is derived from cellulose

2. Nylon-66 is an example of elastomer

3. The repeat unit in natural rubber is isoprene

4. Both starch and cellulose are polymers of glucose