The correct reaction(s) among the following options is/are -

1. ${\mathrm{SiO}}_2$ $+\hspace{0.17em}4\mathrm{HF}$ $\to$ ${\mathrm{SiF}}_4$ $+$ $2{\mathrm{H}}_2\mathrm{O}$

2. $\mathrm{ZnO}$ $+$ $\mathrm{CO}$ $\to$ $\mathrm{Zn}$ $+\hspace{0.17em}{\mathrm{CO}}_2$

3. ${\mathrm{SiF}}_4$ $\hspace{0.17em}+$ $2\mathrm{HF}$ $\to$ ${\mathrm{H}}_2{\mathrm{SiF}}_6$

4. All of the above

Which statement among the following is incorrect?

The correct statement(s) regarding diborane and boric acid is/are :

1. Diborane has two 3c-2e^- bonds.

2. Boric acid has a layered structure.

3. Four 2c-2e^- bonds are present in diborane.

4. All of the above

Which of the following statements is incorrect?

Which of the following statements about aluminium are correct?

Which of the following statements regarding diamond and graphite is incorrect?

Consider the following reaction,

$\mathrm{Al}+\mathrm{NaOH}\to \mathrm{X}+{\mathrm{H}}_2$
${\mathrm{B}}_2{\mathrm{H}}_6<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{NH}}_3\to \mathrm{Y}$

X and Y in the above reaction are:

$1.<mspace\; width="1em"></mspace>\mathrm{X}=<mspace\; width="1em"></mspace>\mathrm{Al}{\left(\mathrm{OH}\right)}_2<mspace\; width="1em"></mspace>;<mspace\; width="1em"></mspace>\mathrm{Y}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>{\mathrm{N}}_2\left[{\mathrm{BH}}_4\right]$
$2.<mspace\; width="1em"></mspace>\mathrm{X}<mspace\; width="1em"></mspace>=\mathrm{Na}\left[\mathrm{Al}{\left(\mathrm{OH}\right)}_4\right]<mspace\; width="1em"></mspace>;<mspace\; width="1em"></mspace>\mathrm{Y}<mspace\; width="1em"></mspace>={\mathrm{N}}_3{\mathrm{B}}_3{\mathrm{H}}_6$
$3.<mspace\; width="1em"></mspace>\mathrm{X}=<mspace\; width="1em"></mspace>\mathrm{Na}\left[\mathrm{Al}{\left(\mathrm{OH}\right)}_4\right]<mspace\; width="1em"></mspace>;<mspace\; width="1em"></mspace>\mathrm{Y}<mspace\; width="1em"></mspace>=<mspace\; width="1em"></mspace>{\mathrm{B}}_3{\mathrm{N}}_2$
$4.<mspace\; width="1em"></mspace>\mathrm{None}<mspace\; width="1em"></mspace>\mathrm{of}<mspace\; width="1em"></mspace>\mathrm{the}<mspace\; width="1em"></mspace>\mathrm{above}$

Identify the statement that incorrectly describes the preparation of carbon monoxide or carbon dioxide.

Which of the following is primarily responsible for the formation of a layered
polymeric structure in solid boric acid (H₃BO₃)?

1. Its acidic nature.

2. The presence of hydrogen bonds.

3. Its monobasic nature.

4. Its trigonal planar geometry.

Identify the pair in which both oxides are amphoteric in nature.
 

1. Tl₂O₃ and SiO₂

2. CO₂ and B₂O₃

3. B₂O₃ and SiO₂

4. Al₂O₃ and PbO₂