1
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
Change Language
In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is __________ $$\times$$ 10$$-$$2.

(Round off to the nearest integer)
Your input ____
2
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
Change Language
The dihedral angle in staggered form of Newman projection of 1, 1, 1-Trichloro ethane is ___________ degree. (Round off to the nearest integer)
Your input ____
3
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
Change Language
For the first order reaction A $$\to$$ 2B, 1 mole of reactant A gives 0.2 moles of B after 100 minutes. The half life of the reaction is __________ min. (Round off to the nearest integer).

[Use : ln 2 = 0.69, ln 10 = 2.3]

Properties of logarithms : ln xy = y ln x;

$$\ln \left( {{x \over y}} \right) = \ln x - \ln y$$

(Round off to the nearest integer)
Your input ____
4
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
Change Language
For the cell

Cu(s) | Cu2+ (aq) (0.1 M) || Ag+(aq) (0.01 M) | Ag(s)

the cell potential E1 = 0.3095 V

For the cell

Cu(s) | Cu2+ (aq) (0.01 M) || Ag+(aq) (0.001 M) | Ag(s)

the cell potential = ____________ $$\times$$ 10$$-$$2 V. (Round off the nearest integer).

[Use : $${{2.303RT} \over F}$$ = 0.059]
Your input ____
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