MCQ
Which of the following is most acidic
  • A
    $N{a_2}O$
  • B
    $MgO$
  • $A{l_2}{O_3}$
  • D
    $CaO$

Answer

Correct option: C.
$A{l_2}{O_3}$
c
$Na 2 O , MgO , CaO$ are metallic oxide of $s$ block. These maetallic oxides powerful bases, while $Al _2 O 3$ is metallic oxide of $p$ block which has comapratively more acidic character. Hence, it is the most acidic oxide among all.

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

PH of water is 7 at 25°C. If water is heated at 80°C, its pH will:
What is the correct $IUPAC$ name for  $C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,}{\mathop{\overset{H\,\,\,}{\mathop{\overset{|\,\,\,\,\,}{\mathop{C-}}\,}}\,}}\,}}\,CH=CH-C{{H}_{2}}-\overset{O\,\,\,\,}{\mathop{\overset{||\,\,\,\,}{\mathop{C-}}\,}}\,OH$
Which of the following is Aromatic
Identify the $D$ and $E$ in the following reaction

$\begin{array}{*{20}{c}}
  {C{H_3} - CH - CH - C{H_3}\xleftarrow[{ether}]{{Na}}R\,' - Br\,\xrightarrow{{Mg}}'D'\,\xrightarrow{{{H_2}O}}E} \\ 
  {\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,\,\,C{H_3}\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}$

Which pair of elements with the given atomic numbers is expected to have similar properties?
Pure ammonia is placed in a vessel at a temperature where its dissociation constant (α) is appreciable. At equilibrium :
The equilibrium $S{O_2}C{l_{2(g)}}$ $\rightleftharpoons$ $S{O_{2(g)}} + C{l_{2(g)}}$ is attained at $25\,^oC$ in a closed container and an inert gas helium is introduced which of the following statement is correct
Pentagonal bipyramidal structure contains bond angles approximately 
The $pH$ of $0.05 \,M$ solution of dibasic acid is
For the reaction ${N_2} + 3{H_2}$ $\rightleftharpoons$ $2N{H_3};\,\Delta H = ?$