Download App

1. Some basic concept of chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry1. Some basic concept of chemistry1 Mark
MCQ
What volume of Hydrogen gas, at $273 \,K$ and $1$ atm pressure will be consumed in obtaining $21.6\, g$ of elemental boron (atomic mass $= 10.8$) from the reduction of boron trichloride by Hydrogen .............. $\mathrm{L}$
  • A
    $22.4$
  • B
    $89.6$
  • ✓
    $67.2$
  • D
    $44.8$
✓

Answer

Correct option: C.
$67.2$
c
(c) $BC{l_3} + 3[H] \to B + 3HCl$

$BC{l_3} + \frac{3}{2}{H_2} \to B + 3HCl$;

$B = \frac{{21.6}}{{10.8}} = 2$

$B \equiv \frac{3}{2}{H_2}$

$1$ $ mole$ $ \equiv \frac{3}{2}$ $mole$ ; $2$ $mole$ $-3$ $mole$

$V = 3 \times 22.4 = 67.2\,L$

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

More "M.C.Q (1 Marks)" from 1. Some basic concept of chemistry→1. Some basic concept of chemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following statement$(s)$ is$/$ are not true about the following decomposition reaction :
$2\text{KClO}_3\xrightarrow{ \ \ \ \ \ \ \ }2\text{KCl}+3\text{O}_2$
→
The correct stability order of the following resonance structures of $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}$ is
→
Which one is the correct order of the size of the iodine species
→
What is the molar solubility of :- $Ag_2CO_3 (K_{sp} = 4 \times 10^{-13})$ in $0.1\, M\,Na_2CO_3$ solution?
→
$AlF_3$ is soluble in $HF$ only in presence of $KF.$ It is due to the formation of
→
An acidic buffer solution can be prepared by mixing the solution of
→
$(I)\,\, H_2O_2 + O_3 \rightarrow H_2O + 2O_2$

$(II)\,\, H_2O_2 + Ag_2O \rightarrow 2Ag + H_2P + O_2$

Role of hydrogen peroxide in the above reactions is respectively

→
Which of the following is Aromatic
→
Silver ions are added to a solution with $[Br^-] = [Cl^-] = [CO_3^{-2}]$ $= [AsO_4^{-3}] = 0.1\,M$. Which compound will precipitate with lowest $[Ag^+]$ ?
→
Which of the following acids does not exhibit optical isomerism?
→