Match the following compounds (Column-$I$) with their uses (Column-$II$):
Column-$I$ Column-$II$
$I. Ca(OH)_2$ $A$. Casts of statues
$II. NaCl$ $B$. White wash
$III. CaSO_4 \cdot \frac{1}{2}H_2O$ $C$. Antacid
$IV. CaCO_3$ $D$. Washing soda preparation

  • A
    $I-D, II-A, III-C, IV-B$
  • B
    $I-B, II-C, III-D, IV-A$
  • C
    $I-C, II-D, III-B, IV-A$
  • D
    $I-B, II-D, III-A, IV-C$

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Which of the following substances is used as a fertilizer?

Which of the following orders are correct against the stated property?
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$III$) $MgCO_3 < CaCO_3 < SrCO_3$ - thermal stability

Compare the alkali metals and alkaline earth metals with respect to $(i)$ ionization enthalpy,$(ii)$ basicity of oxides,and $(iii)$ solubility of hydroxides.

The correct statements among the following are:
$(A)$ $BeH_2$ and $MgH_2$ are polymeric in nature.
$(B)$ $LiH$ is unreactive to oxygen at moderate temperatures.
$(C)$ $BeH_2$ and $MgH_2$ possess significant covalent character.
$(D)$ The stability of alkali metal hydrides follows the order $LiH < NaH < KH < RbH < CsH$.

Which of the following thermal stability orders is correct?

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