UPSC NDA II 2012 General Ability Paper
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Question : 79 of 150
Marks:
+1,
-0
Given below is an approximate composition of a substance :
CaO 60 − 70 %
SiO 2 20 − 25 %
Al 2 O 3 5 − 10 %
Fe 2 O 3 2 − 3 %
The substance is
The substance is
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