Which parent oxy acid does not have its own hypo acid?

1. H₂SO₂                                  
2. HNO₂                                            
3. H₃PO₃                                        
4. HClO₃

Cl₂(g) + Ba(OH)₂ → X(aq) + BaCl₂ + H₂O                      
X + H₂SO₄ → Y + BaSO₄                                              
Y \(\xrightarrow[]{\Delta \ > \ 365 \ K}\) Z + H₂O + O₂

Y and Z are respectively :
1. HClO₄, ClO₂
2. HClO₃, ClO₂
3. HClO₃, ClO₆
4. HClO₄, Cl₂O₇

${\mathrm{XeF}}_6$ dissolves in anhydrous $\mathrm{HF}$ to give a good conducting solution that contains-

1. H⁺ and \(XeF_{7}^{-}\) ions
2. \(HF_{2}^{-}\) and \(XeF_{5}^{+}\) ions
3. \(HXeF_{6}^{+}\) and F^- ions
4. None of the above

Which of the following statements about helium is false?

1. It has the lowest boiling point 

2. It has the highest first ionization energy

3. It can diffuse through rubber and plastic material

4. It can form clathrate compounds

No S-S bonds are present in?

1. \(S_{2}O_{3}^{2-}\)                                           

2. \(S_{2}O_{4}^{2-}\)

3. \(S_{2}O_{5}^{2-}\)                                                

4. \(S_{2}O_{7}^{2-}\)

A brown-coloured mixture of two gases is obtained by reducing 6 N nitric acid with metallic copper. This mixture on cooling condenses to a blue liquid which on freezing (-30 ^oC) gives a blue solid. The correct statement for the blue liquid or solid is: 

Which of the following statements is false?  

What is produced when orthophosphoric acid reacts with phosphate rock (fluorapatite)?

1. $\mathrm{Ca}{\left({\mathrm{H}}_2{\mathrm{PO}}_4\right)}_2+{\mathrm{CaF}}_2$                   

2. ${\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2+{\mathrm{CaF}}_2+{\mathrm{H}}_2\mathrm{O}$

3. $\mathrm{Ca}{\left({\mathrm{H}}_2{\mathrm{PO}}_4\right)}_2+\mathrm{HF}$                       

4. ${\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2+\mathrm{HF}+{\mathrm{H}}_2\mathrm{O}$

The oxidation states of the S atom in $S_4{O}_6^{2-}$  from left to right, respectively, are:

1. + 6, 0, 0, and +6                         

2. +5, +1, +1, and +5

3. +5, 0, 0, and +5                           

4. +3, +1, +1, and +3

Which of the following statements is false?