1
JEE Main 2020 (Online) 5th September Morning Slot
Numerical
+4
-0
Change Language
The total number of coordination sites
in ethylenediaminetetraacetate (EDTA4–) is _____.
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2
JEE Main 2020 (Online) 5th September Morning Slot
Numerical
+4
-0
Change Language
An oxidation-reduction reaction in which
3 electrons are transferred has a $$\Delta $$Gº of 17.37 kJ mol–1 at
25 oC. The value of Eo
cell (in V) is ______ × 10–2.
(1 F = 96,500 C mol–1)
Your input ____
3
JEE Main 2020 (Online) 5th September Morning Slot
Numerical
+4
-0
Change Language
A soft drink was bottled with a partial pressure of CO2 of 3 bar over the liquid at room temperature. The partial pressure of CO2 over the solution approaches a value of 30 bar when 44 g of CO2 is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is ______ $$ \times $$ 10–1.
(First dissociation constant of
H2CO3 = 4.0 $$ \times $$ 10–7; log 2 = 0.3; density
of the soft drink = 1 g mL–1) .
Your input ____
4
JEE Main 2020 (Online) 5th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
If the volume of a parallelopiped, whose
coterminus edges are given by the
vectors $$\overrightarrow a = \widehat i + \widehat j + n\widehat k$$,
$$\overrightarrow b = 2\widehat i + 4\widehat j - n\widehat k$$ and
$$\overrightarrow c = \widehat i + n\widehat j + 3\widehat k$$ ($$n \ge 0$$), is 158 cu. units, then :
A
n = 7
B
$$\overrightarrow b .\overrightarrow c = 10$$
C
$$\overrightarrow a .\overrightarrow c = 17$$
D
n = 9
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