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

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

1. sodium-hexametaphosphate 33 g, sodium carbonate 7 g and distilled water one litre

2.sodium-hexametaphosphate 7 g, sodium carbonate 33 g and distilled water one litre

3.sodium-hexametaphosphate 23 g, sodium carbonate 17 g and distilled water one litre

4.none of these.

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