JEE Main 2020 Question Paper (02-Sep-2020) (Shift 2)

Question 1

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be:

Accepted Answer

aqueous $\mathrm{NaHCO}_3$

Answer

vinegar

Answer

aqueous NaOH

Answer

aqueous $\mathrm{NH}_3$

Question 2

An organic compound '$ \mathrm{A}$' $\left(\mathrm{C}_{9}\mathrm{H}_{10}\mathrm{O}\right)$ when treated with conc. $\mathrm{HI}$ undergoes cleavage to yield compound '$ \mathrm{B}$' and '$ \mathrm{C}$'. '$ \mathrm{B}$' gives yellow precipitate with $\mathrm{AgNO}_{3}$ whereas '$ \mathrm{C}$' tautomerizes to '$ \mathrm{D}$'. '$ \mathrm{D}$' gives positive iodoform test. '$ \mathrm{A}$' could be:

Accepted Answer

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Answer

Answer

Answer

Question 3

The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following processes can explain this?

Accepted Answer

Osmosis

Answer

Dialysis

Answer

Diffusion

Answer

Reverse osmosis

Question 4

Amongst the following statements regarding adsorption, those that are valid are:
(a) $\mathrm{\Delta H}$ becomes less negative as adsorption proceeds.
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas.
(c) On adsorption, the residual force acting along the surface of the adsorbent increases.
(d) With the increase in temperature, the equilibrium concentration of adsorbate increases.

Accepted Answer

(a) and (b)

Answer

(d) and (a)

Answer

(b) and (c)

Answer

(c) and (d)

Question 5

The major product obtained from $\mathrm{E}_2$-elimination of $3$-bromo-$2$-fluoropentane is

Accepted Answer

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Answer

Answer

Answer