Download App

STD 11 -p-Block elements - I — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 -p-Block elements - I4 Marks
MCQ
Consider the following flow diagram :-

Compound $X$ and $Y$ are respectively.

  • A
    $Na_2B_4O_7.10H_2O, B_2O_3$
  • ✓
    $NaBO_2, Na_2B_4O_7.10H_2O$
  • C
    $NaBO_2, CaCO_3$
  • D
    $Na_2B_4O_7.10H_2O, CaCO_3$
✓

Answer

Correct option: B.
$NaBO_2, Na_2B_4O_7.10H_2O$
b
$\mathop {2CaO.3{B_2}{O_3}}\limits_{Colemanite}  + 2N{a_2}C{O_3} \to $ $2CaCO_3^ -  + N{a_2}{B_4}{O_7} + 2NaB{O_2}$ $\xrightarrow{\begin{subarray}{l} 
  Filtered \\ 
   - CaC{O_3}\,(as\,residue) 
\end{subarray} }\underbrace {N{a_2}{B_4}{O_7} + NaB{O_2}}_{in\,solution}$ $\xleftarrow[\begin{subarray}{l} 
  and\,allowed\,to\, \\ 
  crystallise\,out \\ 
  and\,filtered 
\end{subarray} ]{{Concentrated}}\mathop {N{a_2}{B_4}{O_7}.10{H_2}O}\limits_{as\,residue} $ $\mathop { + NaB{O_2}}\limits_{in\,filtrate} \xrightarrow{\begin{subarray}{l} 
  C{O_2}\,passed\,and \\ 
  crystallise\,out\,again 
\end{subarray} }N{a_2}{B_4}{O_7}.10{H_2}O \downarrow $

$[4NaB{O_2} + C{O_2} \to N{a_2}{B_4}{O_7} + N{a_2}C{O_3}]$

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

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following has the maximum number of unpaired $d-$ electrons
→
When equal volume of following solutions are mixed, precipitation of $AgCl$ will occur in -$(k_{sp}$ of $AgCl = 1.8\times10^{-10})$
→
Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of $2-$ fluoroethanol is
→
Which of the following explains the viscous nature of glycerol
→
The shape of $I{F_7}$ molecule is
→
Which one of the following mixtures can be separated into pure components by fractional distillation
→
Rutherford’s experiment, which established the nuclear model of the atom, used a beam of
→
Which of these is least likely to act as a Lewis base?
→
Arrange the following in the order of increasing mass (atomic mass: $O = 16, Cu = 63, N = 14$)

$I.$ one atom of oxygen

$II.$ one atom of nitrogen

$III.$ $1\times10^{-10}$ mole of oxygen

$IV.$ $1\times10^{-10}$ mole of copper

→
The molality of the solution prepared by dissolving $125\, mL$ of pure methanol $(d = 0.8\, g\,mL^{-1})$ in $375\, g$ of ethanol is
→