JEE (Advanced) 2020 Paper-2

In the chemical reaction between stoichiometric quantities of $$KMnO_4$$ and KI in weakly basic solution, what is the number of moles of $$I_2$$ released for 4 moles of $$KMnO_4$$ consumed?

A n acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL of 3% $$H_2O_2$$, a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) compound ‘X’. What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of X?

The structure of a peptide is given below.

If the absolute values of the net charge of the peptide at pH = 2, pH = 6, and pH = 11 are $$\mid 𝑧_1 \mid, \mid 𝑧_2 \mid$$, and $$\mid 𝑧_3 \mid$$, respectively, then what is $$\mid 𝑧_1 \mid + \mid 𝑧_2 \mid + \mid 𝑧_3 \mid$$?

An organic compound $$(C_8H_{10}O_2)$$ rotates plane-polarized light. It produces pink color with neutral $$FeCl_3$$ solution. What is the total number of all the possible isomers for this compound?

In an experiment, 𝑚 grams of a compound X (gas/liquid/solid) taken in a container is loaded in a balance as shown in figure I below. In the presence of a magnetic field, the pan with X is either deflected upwards (figure II), or deflected downwards (figure III), depending on the compound X. Identify the correct statement(s).

Which of the following plots is(are) correct for the given reaction?
($$[P]_0$$ is the initial concentration of P)

Which among the following statement(s) is(are) true for the extraction of aluminium from bauxite?

Choose the correct statement(s) among the following.

Consider the following four compounds I, II, III, and IV.

Choose the correct statement(s).

Consider the following transformations of a compound P.

Choose the correct option(s).