MCQ
Which element among the Lanthanides has the smallest atomic radius?
- ACerium.
- BLutetium.
- CEuropium.
- DGadolinium.
Explanation:
Lutetium is the last element of the Lanthanides, so it will have the smallest ionic radius due to Lanthanide contraction.
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Reason : Concentrated sulpuric acid has a great affinity for water.
$A.$ During charging of battery, $PbSO _4$ on anode is converted into $PbO _2$
$B.$ During charging of battery, $PbSO _4$ on cathode is converted into $PbO _2$
$C.$ Lead storage battery, consists of grid of lead packed with $PbO _2$ as anode
$D.$ Lead storage battery has $\sim 38 \%$ solution of sulphuric acid as an electrolyte
Choose the correct answer from the options given below:
$A$ $+$ $\begin{array}{*{20}{c}}
{C{H_3} - C - C{H_3}} \\
{||\,} \\
{O\,\,\,}
\end{array}$ $→$ $B$ $'B'$ is