1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
The reaction of H3N3B3Cl3 (A) with LiBH4 in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H3N3B3(Me)3. Compounds (B) and (C) respectively, are :
A
Borazine and MeBr
B
Diborane and MeMgBr
C
Boron nitride and MeBr
D
Borazine and MeMgBr
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is :
A
Mercury
B
Carbon tetrachloride
C
Zinc sulphide
D
Silicon carbide
4
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
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