Which of the following orders are correct aga | vedclass

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(D) $I$) The stability of superoxide increases as the size of the alkali metal cation increases due to the stabilization of the large anion by the lar

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$I, II$ & $III$

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(D) $I$) The stability of superoxide increases as the size of the alkali metal cation increases due to the stabilization of the large anion by the large cation. Thus,the order $NaO_2 $II$) The basic strength of alkaline earth metal hydroxides increases down the group as the solubility and ionic character increase. Thus,the order $Mg(OH)_2 $III$) The thermal stability of alkaline earth metal carbonates increases down the group as the electropositive character of the metal increases. Thus,the order $MgCO_3 Therefore,all three statements are correct.

Which of the following orders are correct against the stated property?
$I$) $NaO_2 < KO_2 < RbO_2 < CsO_2$ - stability
$II$) $Mg(OH)_2 < Ca(OH)_2 < Sr(OH)_2$ - basic strength
$III$) $MgCO_3 < CaCO_3 < SrCO_3$ - thermal stability

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Which of the following is an $\text{Incorrect}$ statement?

Match the following substances in List-$I$ with their uses in List-$II$:
| List-$I$ (Substance) | List-$II$ (Use) |
| :--- | :--- |
| $(A)$ $Na_2O_2$ | $(I)$ Photoelectric cells |
| $(B)$ $D_2O$ | $(II)$ Antacid |
| $(C)$ $Cs$ | $(III)$ Oxidising agent |
| $(D)$ $Mg(OH)_2$ | $(IV)$ Moderator |

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Which of the following orders are correct against the stated property?$I$) $NaO_2 < KO_2 < RbO_2 < CsO_2$ - stability$II$) $Mg(OH)_2 < Ca(OH)_2 < Sr(OH)_2$ - basic strength$III$) $MgCO_3 < CaCO_3 < SrCO_3$ - thermal stability