JEE Main 2020 Question Paper (03-Sep-2020) (Shift 2)

Question 1

Among the statements (I &ndash; IV), the correct ones are: (I) Be has smaller atomic radius compared to Mg. (II) Be has higher ionization enthalpy than Al. (III) Charge/radius ratio of Be is greater than that of Al. (IV) Both Be and Al form mainly covalent compounds.

Accepted Answer

$(I)$, $(II)$ and $(IV)$

Answer

$(I)$, $(III)$ and $(IV)$

Answer

(II), (III) 	ext{ and } (IV)

Answer

(I), (II) and (III)

Question 2

An ionic micelle is formed on the addition of:

Accepted Answer

""

Answer

liquid diethyl ether to aqueous $NaCl$ solution

Answer

Answer

Sodium stearate to pure toluene

Question 3

The increasing order of the reactivity of the following compounds in nucleophile addition reaction is: Propanone < Butanone < Benzaldehyde < Propanal

Accepted Answer

Butanone < Propanone < Benzaldehyde < Propanal

Answer

Benzaldehyde > Butanone < Propanone < Propanal

Answer

Propanal < Propanone < Butanone < Benzaldehyde

Answer

Benzaldehyde < Propanal < Propanone < Butanone

Question 4

$100\ \mathrm{mL}$ of $0.1\ \mathrm{M}\ \mathrm{HCl}$ is taken in a beaker and to it $100\ \mathrm{mL}$ of $0.1\ \mathrm{M}\ \mathrm{NaOH}$ is added in steps of $2\ \mathrm{mL}$ and the $\mathrm{pH}$ is continuously measured. Which of the following graphs correctly depicts the change in $\mathrm{pH}$?

Accepted Answer

""

Answer

Answer

Answer

Question 5

A mixture of one mole each of $\mathrm{H}_{2}$, $\mathrm{He}$, and $\mathrm{O}_{2}$ are enclosed in a cylinder of volume $\mathrm{V}$ at temperature $T$. If the partial pressure of $\mathrm{H}_{2}$ is $2\,\mathrm{atm}$, the total pressure of the gases in the cylinder is:

Accepted Answer

$6 \quad \mathrm{atm}$

Answer

$38 \quad \mathrm{atm}$

Answer

$14 \quad \mathrm{atm}$

Answer

$22 \quad \mathrm{atm}$