MCQ
Select incorrect statement
  • Solubility of carbonates of alkali metal cations increases down the group
  • B
    Melting point of flourides of $Na^+, K^+, Rb^+, Cs^+$ decreases down the group
  • C
    Thermal stability of nitrates of $gp-I-A$ cations decrease down the group
  • D
    Solubility of bicarbonates $Na^+ < K^+ < Rb^+ < Cs^+$

Answer

Correct option: A.
Solubility of carbonates of alkali metal cations increases down the group
a

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Select correct statement from the following :

In

$CH _{2} = C = C H - C H _{3}$

$\quad 1\quad \quad 2\quad \quad 3\quad \quad \quad 4$

molecule, the hybridization of carbon $1,2,3$ and $4$ respectively are :

Compound $(X)$ will be

Compound $(X)$ $\xrightarrow[{Pt}]{{5{H_2}}}$ 

Compound $(X)$ $\xrightarrow{{AgN{O_3}}}$ Precipitate

Compound $(X)$ $\xrightarrow[{M{e_2}S}]{{{O_3}}}$ $\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,O\,\,\,\,} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {H - C - C{H_2} - C{H_2} - C - C - H} 
\end{array}$ $\begin{array}{*{20}{c}}
  {\,\,O\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,} \\ 
  {H - C - C - O - H} 
\end{array}$ $ + \begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,} \\ 
  {H - C - O - H} 
\end{array}$ $ + \begin{array}{*{20}{c}}
  {CHO} \\ 
  {|\,\,\,\,\,\,\,\,} \\ 
  {CHO} 
\end{array}$

Correct order of basicity is
Aqueous solution of which of the following compounds is the best conductor of electric current ?
Match List $I$ with List $II$. Choose the correct answer from the options given below:

List $-I$ List $-II$

$A.$ Melting point $[\mathrm{K}]$ 

$I.$ $\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}$

$B.$ Ionic Radius $\left[\mathrm{M}^{+3} / \mathrm{pm}\right]$

$II.$ $\mathrm{B}>\mathrm{Tl}>\mathrm{Al} \approx \mathrm{Ga}>\mathrm{In}$
$C.$ $\Delta_{\mathrm{i}} \mathrm{H}_1 $ $ [\mathrm{~kJ} \mathrm{~mol}^{-1}]$ $III.$ $\mathrm{Tl}>\mathrm{In}>\mathrm{Al}>\mathrm{Ga}>\mathrm{B}$
$D.$ Atomic Radius $[pm]$ $IV.$ $\mathrm{B}>\mathrm{Al}>\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}$