NTA JEE Main 9th January 2020 Shift 2

In the following reaction A is:

Consider the following reactions,

The compound [P] is:

The decreasing order of basicity of the following amines is:

Which polymer has 'chiral' monomer(s)?

A, B and C are three biomolecules. The results of the tests performed on them are given below:

10.30 mg of $$O_2$$ is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of $$O_2$$ in ppm is ___________.

A cylinder containing an ideal gas (0.1 mol of 1.0 dm$$^3$$) is in thermal equilibrium with a large volume of 0.5 molal aqueous solution of ethylene glycol at its freezing point. If the stoppers $$S_1$$ and $$S_2$$ (as shown in the figure) are suddenly withdrawn, the volume of the gas in litres after equilibrium is achieved will be ___________.
(Given, $$K_f$$(water) $$= 2.0$$ K kg mol$$^{-1}$$, R $$= 0.08$$ dm$$^3$$ atm K$$^{-1}$$ mol$$^{-1}$$)

A sample of milk splits after 60 min at 300K and after 40 min at 400K when the population of lactobacillus acidophilus in it doubles. The activation energy (in kJ/mol) for this process is closest to ___________.
(Given, $$R = 8.3$$ J mol$$^{-1}$$ K$$^{-1}$$, $$\ln\left(\frac{2}{3}\right) = 0.4$$, $$e^{-3} = 4.0$$)

The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ___________.

Consider the following reactions: $$A \xrightarrow[(ii)H_3O^+]{(i)CH_3MBr}B \xrightarrow[573K]{Cu} 2-methyl-2-butene$$. The mass percentage of carbon in A is ___________.