Download App

Equilibrium — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEquilibrium1 Mark
MCQ
Fear or excitement generally causes one to breathe rapidly and it results in the decrease of concentration of $\ce{CO_2}$​ in blood. In what way, it will change the $\ce{pH}$ of blood?
  • A
    $\ce{pH}$ will increase
  • B
    $\ce{pH}$ will decrease
  • ✓
    No change
  • D
    $\ce{pH}$ will be $7$
✓

Answer

Correct option: C.
No change
As we know, $\ce{CO_2}$​ is acidic in nature. So, a decrease in its concentration should increase the $\ce{pH}.$ But, blood contains serum which has proteins in it. This acts as a buffer solution. We already know that buffer solutions resist a change in the $\ce{pH}$ even on addition of a small amount of acid or small amount of base or dilution, etc.

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 Equilibrium→Equilibrium — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A buffer solution is a solution whose $\ce{pH}$ value on keeping in the air :
→
A sample was weighted using two different balances. The result’s were (i) $3.929\, g$ (ii) $4.0\, g$. How would the weight of the sample be reported......$g$
→
Which of the following is not correctly matched :
→
In the reaction product $D$ is $\begin{array}{*{20}{c}}
  {C{H_2}} \\ 
  {||\,\,\,\,\,\,\,\,} \\ 
  {C{H_2}} 
\end{array}$ $\xrightarrow{{B{r_2}/CC{l_4}}}A\xrightarrow{{KCN}}B\xrightarrow{{{H_3}{O^ + }}}C\xrightarrow{\Delta }D$
→
Which of the following reacts with nitrogen when heated in air:
→
How many lone pair of electrons are present on the central atom of $\ce{{CH}_4,{NH}_3,{PCl}_3}$ and $\ce{{PCl}_5}$​ molecules?
→
Which one of the following compounds is a Lewis acid
→
A solution has $pH =5$, then how many $\left[ OH ^{-}\right]$are present in solution :
→
The structural formula of cocaine is shown below. How many stereogenic carbon  atoms are there in this molecule ?
→
The two electrons in $K $ sub-shell will differ in
→