Which of the following correctly describes the nature of an aqueous solution of borax?

1.	Neutral	2.	Amphoteric
3.	Basic	4.	Acidic

Which of the following represents the hybridization of boron atoms in diborane, B₂H₆?

1. sp

2. s${\mathrm{p}}^2$

3. s${\mathrm{p}}^3$

4. ds${\mathrm{p}}^2$

Find the thermodynamically most stable allotrope of carbon.

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

When hydrated alumina is treated with an aqueous NaOH solution, it gives-

1. ${\mathrm{NaAlO}}_2$

2. $\mathrm{Na}\left({\mathrm{Al}}_2{\mathrm{O}}_3\right)$

3. ${\mathrm{NaAl}}_2\mathrm{O}$

4. Both (2) and (3)

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

Identify the incorrect statement regarding allotropes/ allotropy.

The correct statement(s) regarding thallium is/are :

1. Thallium displays both +1, and +3 oxidation states.

2. It resembles group 1 metals in some reactions.

3. Thallium only shows a +1 oxidation state.

4. Both (1) and (2) 

Which statement among the following is incorrect?

Borax when heated strongly gives

1. ${\mathrm{Na}}_{}{\mathrm{BO}}_2$

2. ${\mathrm{B}}_2{\mathrm{O}}_3$

3. ${\mathrm{Na}}_2{\mathrm{O}}_2$

4. Both (1) and (2)