Q.

According to IS : 2720 - 1965, the composition of a dispersing solution used in pipette analysis for determining the size of particles, is

A. sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre
B. sodium-hexametaphosphate 7 g, sodium carbonate 33 g and distilled water one litre
C. sodium-hexametaphosphate 23 g, sodium carbonate 17 g and distilled water one litre
D. None of these
Answer» A. sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre
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