1
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1
Change Language

50 mL of 0.1 M CH3COOH is being titrated against 0.1 M NaOH. When 25 mL of NaOH has been added, the pH of the solution will be _____________ $$\times$$ 10$$-$$2. (Nearest integer)

(Given : pKa (CH3COOH) = 4.76)

log 2 = 0.30

log 3 = 0.48

log 5 = 0.69

log 7 = 0.84

log 11 = 1.04

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2
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1
Change Language

A flask is filled with equal moles of A and B. The half lives of A and B are 100 s and 50 s respectively and are independent of the initial concentration. The time required for the concentration of A to be four times that of B is ___________ s.

(Given : ln 2 = 0.693)

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3
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1
Out of Syllabus
Change Language

2.0 g of H2 gas is adsorbed on 2.5 g of platinum powder at 300 K and 1 bar pressure. The volume of the gas adsorbed per gram of the adsorbent is __________ mL.

(Given : R = 0.083 L bar K$$-$$1 mol$$-$$1)

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4
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1
Change Language

The spin-only magnetic moment value of the most basic oxide of vanadium among V2O3, V2O4 and V2O5 is _____________ B.M. (Nearest integer)

Your input ____
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