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1
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The number of P−OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid (H4P2O7) respectively are :
A
four and four
B
five and four
C
five and five
D
four and five
2
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The number of S = O and S − OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :
A
(2 and 2) and (2 and 2)
B
(2 and 4) and (2 and 4)
C
(4 and 2) and (2 and 4)
D
(4 and 2) and (4 and 2)
3
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A metal ‘M’ reacts with nitrogen gas to afford ‘M3N’. ‘M3N’ on heating at high temperature gives back ‘M’ and on reaction with water produces a gas ‘B’. Gas ‘B’ reacts with aqueous solution of CuSO4 to form a deep blue compound. ‘M’ and ‘B’ respectively are :
A
Li and NH3
B
Ba and N2
C
Na and NH3
D
Al and N2
4
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are :
A
Cl- and $$ClO_2^ - $$
B
ClO- and $$ClO_3^ - $$
C
Cl- and ClO-
D
$$ClO_2^ - $$ and $$ClO_3^ - $$
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