1
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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
2
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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
3
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The number of bonds between sulphur and oxygen atoms in S2O82- and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively, are :
A
4 and 8
B
8 and 6
C
4 and 6
D
8 and 8
4
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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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