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1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Which of the following does not give oxygen on heating?
A
K2Cr2O7
B
(NH4)2Cr2O7
C
KClO3
D
Zn(ClO3)2
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
In which of the following arrangements the given sequence is not strictly according to the property indicated against it?
A
HF < HCl < HBr < HI : increasing acidic strength
B
H2O < H2S < H2Se < H2Te : increasing pKa values
C
NH3 < PH3 < AsH3 < SbH3 : increasing acidic character
D
CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following statements is not valid for oxoacids of phosphorus?
A
Orthophosphoric acid is used in the manufacture of triple superphosphate.
B
Hypophosphorous acid is a diprotic acid.
C
All oxoacids contain tetrahedral four coordinated phosphorus.
D
All oxoacids contain atleast one P$$=$$O unit and one P$$-$$OH group.
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
In which of the following compounds, nitrogen exhibits highest oxidation state?
A
N2H4
B
NH3
C
N3H
D
NH2OH
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