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1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In curing cement plasters water is sprinkled from time to time. This helps in :
A
developing interlocking needle like crystals of hydrated silicates
B
hydrating sand and gravel mixed with cement
C
converting sand into silicic acid
D
keeping it cool
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The solubilities of carbonates decrease down the magnesium group due to a decrease in :
A
hydration energy of cations
B
inter-ionic attraction
C
entropy of solution formation
D
lattice energies of solids
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The substance not likely to contain CaCO3 is :
A
calcined gypsum
B
sea shells
C
dolomite
D
a marble statue
4
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
KO2 (potassium super oxide) is used in oxygen cylinders in space and submarines because it :
A
absorbs CO2 and increases O2 content
B
eliminates moisture
C
absorbs CO2
D
produces ozone
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