Incorrect statement among the following about zeolites is:

1.	They have an open structure which enables them to take up small molecules.
2.	Zeolites are aluminosilicates having a three-dimensional network.
3.	Some of the \(\mathrm{SiO}_4^{4-}\)units are replaced by \(\mathrm{AlO}_4^{5-}\) and \(\mathrm{AlO}_6^{9-}\) ions in zeolites.
4.	They are used as cation exchangers.

In the borax bead test, the coloured bead is formed due to the formation of:

1. Orthoborate

2. Metaborate

3. Double oxide

4. Tetraborate

$Pb{O}_2$ $\to$ $PbO$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $∆G_{298}$ $<0$
$Sn{O}_2\to SnO$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $$ $∆G_{298}$ $>$ $0$

The most probable oxidation state of Pb & Sn will be:

1. ${\mathrm{Pb}}^{+4},$ ${\mathrm{Sn}}^{+4}$

2. ${\mathrm{Pb}}^{+4}$ $,$ ${\mathrm{Sn}}^{+2}$

3. ${\mathrm{Pb}}^{+2}$ $,$ ${\mathrm{Sn}}^{+2}$

4. ${\mathrm{Pb}}^{+2}$ $,$ ${\mathrm{Sn}}^{+4}$

Which of the following statements is incorrect?

Which of the following oxide is amphoteric?

1. CO₂ 

2. SnO₂

3. CaO 

4. SiO₂

Which of the following is the correct statement?
1. Ga⁺ is more stable than ln⁺.
2. Al⁺ is more stable than ln⁺.
3. Ga⁺ is more stable than Al⁺.
4. Al⁺ is more stable than Ga⁺.