MCQ
The conjugate acid of $H_2PO_4^-$ is
- ✓$H_3PO_4$
- B$H_2PO_4^-$
- C$HPO_4^{-2}$
- D$PO_4^{-3}$
✓
Answer
Correct option: A.
$H_3PO_4$
a
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
Which of the following presents the correct order of second ionization enthalpies of $C, N, O$ and $F$ ?
→A first order reaction is $10\%$ completed in $20\, minutes$ then what will be the time for $19\%$ completion of reaction ...... $\min$
→$A(g) \rightarrow 2B(g)$ initially $2$ moles of $A$ are taken in $5$ litre vessel. After $20\, min$, ${\left[ A \right]_t} = \frac{{{{\left[ B \right]}_t}}}{2}$ . Find half life time of $A$ in the first order reaction .......... $\min$
→The bleaching action of bleaching powder is due to the formation of
Lewis acid
Which of the following will undergo sulphonation at fastest rate ?
Taking into account the stability of various cycloalkanes and carbocations, as well as the rules governing mechanisms of carbocation rearrangements, what is the most likely product of this reaction ?
In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of $1\, M \,H_2SO_4.$ The percentage of nitrogen in the soil is
→Arrange $Ce^{+3}, La^{+3}, Pm^{+3}$ and $Yb^{+3}$ in increasing order of their ionic radii
→Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason $R$.
→Assertion $A$ : Energy of $2 s$ orbital of hydrogen atom is greater than that of $2\,s$ orbital of lithium.
Reason $R$ : Energies of the orbitals in the same subshell decrease with increase in the atomic number.
In the light of the above statements, choose the correct answer from the options given below.