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1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2 in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:
A
Pb(NO3)2
B
(NH4)2Cr2O7
C
NH4NO2
D
NaN3
2
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a dark blue-violet coloured solution. A and B respectively, are :
A
Na and NaNO3
B
Na and Na3N
C
Mg and Mg3N2
D
Mg and Mg(NO3)2
3
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
White Phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound (X). (X) on acidification with HCl gives compound (Y). The basicity of compound (Y) is :
A
2
B
4
C
1
D
3
4
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
In the following reaction products (A) and (B) respectively, are :

NaOH + Cl2 $$ \to $$ (A) + side products
(hot and conc.)

Ca(OH)2 + Cl2 $$ \to $$ (B) + side products (dry)
A
NaOCl and Ca(OCl)2
B
NaClO3 and Ca(ClO3)2
C
NaOCl and Ca(ClO3)2
D
NaClO3 and Ca(OCl)2
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