24
MCQ (Multiple Correct Answer)
Which of the following compounds are readily soluble in water?
A
$\mathrm{BeSO}_4$
B
$\mathrm{MgSO}_4$
C
$\mathrm{BaSO}_4$
D
$\mathrm{SrSO}_4$
25
MCQ (Multiple Correct Answer)
When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?
A
$\mathrm{H}^{+}$ ions
B
$\mathrm{Mg}^{2+}$ ions
C
$\mathrm{Ca}^{2+}$ ions
D
$\mathrm{SO}_4^{2-}$ ions
26
MCQ (Multiple Correct Answer)
Identify the correct formula of halides of alkaline earth metals from the following.
A
$\mathrm{BaCl}_2 \cdot 2 \mathrm{H}_2 \mathrm{O}$
B
$\mathrm{BaCl}_2 \cdot 4 \mathrm{H}_2 \mathrm{O}$
C
$\mathrm{CaCl}_2 \cdot 6 \mathrm{H}_2 \mathrm{O}$
D
$\mathrm{SrCl}_2 \cdot 4 \mathrm{H}_2 \mathrm{O}$
27
MCQ (Multiple Correct Answer)
Choose the correct statements from the following.
A
Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal
B
Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of $\mathrm{Be}^{2+}$ overcomes the lattice enthalpy factor
C
Beryllium exhibits coordination number more than four
D
Beryllium oxide is purely acidic in nature
28
MCQ (Multiple Correct Answer)
Which of the following are the correct reasons for anomalous behaviour of lithium?
A
Exceptionally small size of its atom
B
Its high polarising power
C
It has high degree of hydration
D
Exceptionally low ionisation enthalpy