JEE Main 2021 Question Paper (01-Sep-2021) (Shift 2)

Question 1

Which one of the following gives the most stable Diazonium salt?

Accepted Answer

""

Answer

Answer

Answer

Question 2

The potassium ferrocyanide solution gives a Prussian blue colour, when added to :

Accepted Answer

${\mathrm{FeCl}}_{3}$

Answer

$\mathrm{CoCl}_3$

Answer

$\mathrm{CoCl}_2$

Answer

${\mathrm{FeCl}}_{2}$

Question 3

Which one of the following compounds is aromatic in nature?

Accepted Answer

""

Answer

Answer

Answer

Question 4

Monomer units of Dacron polymer are :

Accepted Answer

ethylene glycol and terephthalic acid

Answer

glycerol and phthalic acid

Answer

ethylene glycol and phthalic acid

Answer

glycerol and terephthalic acid

Question 5

Number of paramagnetic oxides among the following given oxides is $ \_\_\_\_\_\_\_\_\_\_\_.$ ${\mathrm{Li}}_{2}\mathrm{O}, \quad \mathrm{CaO}, \quad {\mathrm{Na}}_{2}{\mathrm{O}}_{2}, \quad {\mathrm{KO}}_{2}, \quad \mathrm{MgO} \quad 	ext{and} \quad {\mathrm{K}}_{2}\mathrm{O}$

Accepted Answer

$1$

Answer

$3$

Answer

$0$

Answer

$2$