JEE Main 2023 (Online) 15th April Morning Shift | Ionic Equilibrium Question 10 | Chemistry

JEE Main 2023 (Online) 15th April Morning Shift

MCQ (Single Correct Answer)

-1

Which of the following statement(s) is/are correct?

(A) The $\mathrm{pH}$ of $1 \times 10^{-8}~ \mathrm{M} ~\mathrm{HCl}$ solution is 8 .

(B) The conjugate base of $\mathrm{H}_{2} \mathrm{PO}_{4}^{-}$ is $\mathrm{HPO}_{4}^{2-}$.

(C) $\mathrm{K}_{\mathrm{w}}$ increases with increase in temperature.

(D) When a solution of a weak monoprotic acid is titrated against a strong base at half neutralisation point, $\mathrm{pH}=\frac{1}{2} \mathrm{pK}_{\mathrm{a}}$

Choose the correct answer from the options given below:

$(\mathrm{A}),(\mathrm{B}),(\mathrm{C})$

(B), (C)

(B), (C), (D)

(A), (D)

JEE Main 2023 (Online) 11th April Morning Shift

MCQ (Single Correct Answer)

-1

$$25 \mathrm{~mL}$$ of silver nitrate solution (1M) is added dropwise to $$25 \mathrm{~mL}$$ of potassium iodide $$(1.05 \mathrm{M})$$ solution. The ion(s) present in very small quantity in the solution is/are :

$$\mathrm{I^-}$$ only

$$\mathrm{K^+}$$ only

$$\mathrm{Ag^+}$$ and $$\mathrm{I^-}$$ both

$$\mathrm{NO_3^-}$$ only

JEE Main 2023 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

-1

The incorrect statement for the use of indicators in acid-base titration is :

Phenolphthalein is a suitable indicator for a weak acid vs strong base titration.

Methyl orange may be used for a weak acid vs weak base titration.

Methyl orange is a suitable indicator for a strong acid vs weak base titration.

Phenolphthalein may be used for a strong acid vs strong base titration.

JEE Main 2023 (Online) 25th January Evening Shift

MCQ (Single Correct Answer)

-1

When the hydrogen ion concentration [H$$^+$$] changes by a factor of 1000, the value of pH of the solution __________

decreases by 2 units

increases by 2 units

decreases by 3 units

increases by 1000 units

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