1
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
+4
-0
Change Language
3 g of acetic acid is added to 250 mL of 0.1 M HCL and the solution made up to 500 mL. To 20 mL of this solutions $${1 \over 2}$$ mL of 5 M NaOH is added. The pH of the solution is __________.

[Given : pKa of acetic acid = 4.75, molar mass of acetic of acid = 60 g/mol, log 3 = 0.4771] Neglect any changes in volume.
Your input ____
2
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
+4
-0
Out of Syllabus
Change Language
The number of sp2 hybridised carbons present in "Aspartame" is
Your input ____
3
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
+4
-0
Change Language
The flocculation value of HCl for arsenic sulphide sol.
is 30 m mol L-1 If H2SO4 is used for the flocculatiopn of arsenic sulphide, the amount in grams, of H2SO4 in 250 ml required for the above purposed is ______.
(molecular mass of H2SO4 = 98 g/mol)
Your input ____
4
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
If 3x + 4y = 12$$\sqrt 2 $$ is a tangent to the ellipse
$${{{x^2}} \over {{a^2}}} + {{{y^2}} \over 9} = 1$$ for some $$a$$ $$ \in $$ R, then the distance between the foci of the ellipse is :
A
$$2\sqrt 5 $$
B
$$2\sqrt 7 $$
C
4
D
$$2\sqrt 2 $$
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