1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?
A
In acidic solutions protons coordinate with ammonia molecules forming $$NH^+_4$$ ions and NH3 molecules are not available
B
In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali
C
Copper hydroxide is an amphoteric substance
D
In acidic solutions hydration protects copper ions.
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following nitrates will leave behind a metal on strong heating?
A
Copper nitrate
B
Manganese nitrate
C
Silver nitrate
D
Ferric nitrate
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
The pair of species having identical shapes for molecules of both species is
A
XeF2, CO2
B
BF3, PCl3
C
PF5, IF5
D
CF4, SF4

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