1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the
A
rate is proportional to the surface coverage
B
rate is inversely proportional to the surface coverage
C
rate is independent of the surface coverage
D
rate of decomposition is very slow.
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
Boric acid is an acid because its molecule
A
contains replaceable H+ ion
B
gives up a proton
C
accepts OH$$-$$ from water releasing proton
D
combines with proton from water molecule.
3
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
AlF3 is soluble in HF only in presence of KF. It is due to the formation of
A
K3[AlF3H3]
B
K3[AlF6]
C
AlH3
D
K[AlF3H]
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following statements related to lanthanoids is incorrect?
A
Europium shows + 2 oxidation state.
B
The basicity decreases as the ionic radius decreases from Pr to Lu.
C
All the lanthanons are much more reactive than aluminium.
D
Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis.
EXAM MAP