MCQ
$100\, mL$ of $0.1\, M\, HCl$ is taken in a beaker andto it $100\, mL$ of $0.1\, M\, NaOH$ is added in steps of $2\, mL$ and the $pH$ is continuously measured.
Which of the following graphs correctly depicts the change in $pH?$
- A
- B
- ✓
- D
✓
Answer
Correct option: C.
c
Steep rise in $pH$ around the equivalence point for titration of strong acid with strong base.
Steep rise in $pH$ around the equivalence point for titration of strong acid with strong base.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Predict the formula of a compound formed between a metal $'M\ '$ which has $1^{st}, 2^{nd}, 3^{rd}\ \ce{IP}$ values as $518, 7314, 9820KJ$ mol $^{-1}$ respectively and a halogen $'X\ '.$
→Which of the following occurs when two hydrogen atoms bond with each others
What is a likely product of the reaction shown ?
The wave function $\psi_{n / m m}$ is a mathematical function whose value depends upon spherical polar coordinates $(r, \theta, \phi)$ of the electron and characterized by the quantum numbers $n, l$ and $m_l$. Here $r$ is distance from nucleus, $\theta$ is colatitude and $\phi$ is azimuth. In the mathematical functions given in the Table, $\mathrm{Z}$ is atomic number and $a_0$ is Bohr radius.
→| $column 1$ | $column 2$ | $column 3$ |
| $(I)$ $1$s orbital | $(i)$ $\psi_{n, l, m_l} \propto\left(\frac{Z}{a_0}\right)^{\frac{3}{2}} e^{-\left(\frac{Z r}{a_0}\right)}$ | $image$ |
| ($II$) $2 \mathrm{~s}$ orbital | $(ii)$ One radial node | $(Q)$ Probability density at nucleus $\propto \frac{1}{a_0^3}$ |
| $(III)$ $2 p_z$ orbital | $(iii)$ $\psi_{n, l m_l} \propto\left(\frac{Z}{a_0}\right)^{\frac{5}{2}} r e^{-\left(\frac{Z r}{2 a_0}\right)} \cos \theta$ | $(R)$ Probability density is maximum at nucleus |
| $(IV)$ $3 \mathrm{~d}_{\mathrm{z}}^2$ orbital | $(iv)$ $x y$-plane is a nodal plane | $(S)$ Energy needed to excite electron from $n=2$ state to $n=4$ state is $\frac{27}{32}$ times the energy needed to excite electron from $n=2$ state to $n=6$ state |
($1$) For the given orbital in Column $1$, the only $CORRECT$ combination for any hydrogen-like species is
$[A] (IV) (iv) (R)$ $[B] (II) (ii) (P)$ $[C] (III) (iii) (P)$ $[D] (I) (ii) (S)$
($2$) For $\mathrm{He}^{+}$ion, the only INCORRECT combination is
$[A] (II) (ii) (Q)$ $[B] (I) (i) (S)$ $[C] (I) (i) (R)$ $[D] (I) (iii) (R)$
($3$) For hydrogen atom, the only $CORRECT$ combination is
$[A] (I) (iv) (R)$ $[B] (I) (i) (P)$ $[C] (II) (i) (Q)$ $[D] (I) (i) (S)$
Give the answer quetion ($1$) ($2$) and ($3$)
Match the organic compounds in column $-I$ with the Lassaigne's test results in column $-II$ appropriately
→| Column $-I$ | Column $-II$ |
| $(A)$ Aniline | $(i)$ Red colour with $FeCl_3$ |
| $(B)$ Benzene sulfonic acid | $(ii)$ Violet colour with sodium nitroprusside |
| $(C)$ Thiourea | $(iii)$ Blue colour with hot and acidic solution of $FeSO_ 4$ |
In presence of $\ce{HCl(aq.);H_2S}$ gas results the precipitation of group $-2$ cations but not of group $-4$ cations during qualitative analysis. It is due to :
→Amount of $PCl_5$ (in moles) need to be added to one litre vessel at $250\,^oC$ in order to obtain $0.1\,moles$ of $Cl_2$ for the given change is
→$PC{l_5}\, \rightleftharpoons \,PC{l_3}\, + \,C{l_2}\,;\,{K_C} = \,0.0414\,mol\,{L^{ - 1}}$
Select incorrect statement
The $ pH$ of a soft drink is $3.82$. Its hydrogen ion concentration will be
→Correct $IUPAC$ name of
→