1
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

$$200 \mathrm{~mL}$$ of $$0.01 \,\mathrm{M} \,\mathrm{HCl}$$ is mixed with $$400 \mathrm{~mL}$$ of $$0.01 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}$$. The $$\mathrm{pH}$$ of the mixture is _________.

Given: $$\log {2}=0.30, \log 3=0.48, \log 5=0.70, \log 7=0.84, \log 11=1.04$$

A
1.14
B
1.78
C
2.34
D
3.02
2
JEE Main 2022 (Online) 28th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R

Assertion A : Permanganate titrations are not performed in presence of hydrochloric acid.

Reason R : Chlorine is formed as a consequence of oxidation of hydrochloric acid.

In the light of the above statements, choose the correct answer from the options given below

A
Both $$\mathrm{A}$$ and $$\mathrm{R}$$ are true and $$\mathrm{R}$$ is the correct explanation of $$\mathrm{A}$$
B
Both $$\mathrm{A}$$ and $$\mathrm{R}$$ are true but $$\mathrm{R}$$ is NOT the correct explanation of $$\mathrm{A}$$
C
$$\mathrm{A}$$ is true but $$\mathrm{R}$$ is false
D
$$\mathrm{A}$$ is false but $$\mathrm{R}$$ is true
3
JEE Main 2022 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The plot of $$\mathrm{pH}$$-metric titration of weak base $$\mathrm{NH}_{4} \mathrm{OH}$$ vs strong acid HCl looks like :

A
JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Ionic Equilibrium Question 29 English Option 1
B
JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Ionic Equilibrium Question 29 English Option 2
C
JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Ionic Equilibrium Question 29 English Option 3
D
JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Ionic Equilibrium Question 29 English Option 4
4
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Class XII students were asked to prepare one litre of buffer solution of $$\mathrm{pH} \,8.26$$ by their Chemistry teacher: The amount of ammonium chloride to be dissolved by the student in $$0.2\, \mathrm{M}$$ ammonia solution to make one litre of the buffer is :

(Given: $$\mathrm{pK}_{\mathrm{b}}\left(\mathrm{NH}_{3}\right)=4.74$$

Molar mass of $$\mathrm{NH}_{3}=17 \mathrm{~g} \mathrm{~mol}^{-1}$$

Molar mass of $$\mathrm{NH}_{4} \mathrm{Cl}=53.5 \mathrm{~g} \mathrm{~mol}^{-1}$$ )

A
53.5 g
B
72.3 g
C
107.0 g
D
126.0 g
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