Chemistry · 2023
JEE Main · 15 April 2023, Shift 1 · Q64
Which of the following statement(s) is/are correct? (A) The pH of 1 × 10^-8 M HCl solution is 8. (B) The conjugate base of H_2 PO_4^- is HPO_4^2-.…
Which of the following statement(s) is/are correct?
(A)
The pH of $\displaystyle 1 \times 10^{-8} \mathrm{M} \mathrm{HCl}$ solution is $\displaystyle 8$ .
(B)
The conjugate base of $\displaystyle \mathrm{H}_2 \mathrm{PO}_4^{-}$is $\displaystyle \mathrm{HPO}_4^{2-}$.
(C)
$\displaystyle \mathrm{K}_{\mathrm{w}}$ increases with increase in temperature.
(D)
When a solution of a weak monoprotic acid is titrated against a strong base at half neutralisation point, $\displaystyle \mathrm{pH}=\frac{1}{2} \mathrm{pK}_{\mathrm{a}}$.
Choose the correct answer from the options given below:
Official answer
From NTA’s final answer key for this paper.
(3)
(B) , (C)
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JEE Main 2023 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.