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1
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.
2
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
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Sulphur trioxide can be obtained by which of the following reaction?
A
CaSO4 + C $$\buildrel \Delta \over \longrightarrow $$
B
Fe2(SO4)3 $$\buildrel \Delta \over \longrightarrow $$
C
S + H2SO4 $$\buildrel \Delta \over \longrightarrow $$
D
H2SO4 + PCl5 $$\buildrel \Delta \over \longrightarrow $$
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Which of the following statements is incorrect?
A
Pure sodium metal dissolves in liquid ammonia to give blue solution.
B
NaOH reacts with glass to give sodium silicate.
C
Aluminium reacts with excess NaOH to give Al(OH)3.
D
NaHCO3 on heating gives Na2CO3.
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