1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following substances has the highest proton affinity?
A
H2S
B
NH3
C
PH3
D
H2O
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be :
A
tin
B
sodium
C
magnesium
D
mercury
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Glass is a :
A
super-cooled liquid
B
gel
C
polymeric mixture
D
micro-crystalline solid
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
A
$$Cr_2O^{2-}_7$$ and H2O are formed
B
$$CrO^{2-}_4$$ is reduced to +3 state of Cr
C
$$CrO^{2-}_4$$ is oxidized to +7 state of Cr
D
Cr3+ and $$Cr_2O^{2-}_7$$ are formed
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