MCQ
Alumina is insoluble in water because
  • A
    It is a covalent compound
  • It has high lattice energy and low heat of hydration
  • C
    It has low lattice energy and high heat of hydration
  • D
    $Al^{3+}$ and $O^{2-}$ ions are not excessively hydrated

Answer

Correct option: B.
It has high lattice energy and low heat of hydration
b

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An alkene on ozonolysis gave acetaldehyde the alkene is
Which of the following statements about photochemical smog is wrong?
For the alkali metals, which of the following increases with increasing atomic number?
Which one of the following is always not negative
In a regular octahedral molecule $MX_6,$ the number of $X -M -X$ bonds of $180^o $ are :-
The number of atomic orbitals from the following having $5$ radial nodes is $.......$. $7 s , 7 p , 6 s , 8 p , 8 d$
Manganese ions $(Mn^{2+})$ can be oxidised by Persulphate ions $S_2O_8^{2-}$ according to the following half-equations,

$S_2O_8^{2-} + 2e^- \longrightarrow 2SO_4^{2-}$

$Mn^{2+} + 4H_2O  \longrightarrow MnO_4 + 8H^+ + 5e^-$

How many moles of $S_2O_8^{2-}$ are required to oxidise $1\, mole$ of $Mn^{ 2+}$ ?

Sodium oxide reacts with water to produce sodium hydroxide. $20.0\, \mathrm{~g}$ of sodium oxide is dissolved in $500\, \mathrm{~mL}$ of water. Neglecting the change in volume, the concentration of the resulting $\mathrm{NaOH}$ solution is $........\times \quad 10^{-1} \quad$ $M.$ (Nearest integer)

[Atomic mass $: \mathrm{Na}=23.0, \mathrm{O}=16.0, \mathrm{H}=1.0]$

The charge of an electron is $ - 1.6 \times {10^{ - 19}}C.$ The value of free charge on $L{i^ + }$ ion will be
The successive ionisation energy values for an element $X$ are given below element $X$ belongs to group :-
$A. 1^{st}$ ionisation energy $= 410\, kJ\, mol^{-1}$
$B. 2^{nd}$ ionisation energy $= 820\, kJ\, mol^{-1}$
$C. 3^{rd}$ ionisation energy $= 1100\, kJ\, mol^{-1}$
$D. 4^{th}$ ionisation energy $= 1500\, kJ\, mol^{-1}$
$E. 5^{th}$ ionisation energy $= 3200\, kJ\, mol^{-1}$