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Q.

90gm of sulphuric acid of specific gravity 1.8 are mixed with 90gm of water of density 1gm/cc. If the specific gravity of mixture is 1.5, the contraction in volume when liquids are mixed is

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a

40cc

b

20cc

c

120cc

d

140cc

answer is D.

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Detailed Solution

v1=mH2So4PH2So4=901.8=50c.c

v2=mH2OρH2O=901=90c.c

v1+v2=140c.c

vmix=1801.5=120c.c

Contraction = 140 – 120 = 20c.c

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90gm of sulphuric acid of specific gravity 1.8 are mixed with 90gm of water of density 1gm/cc. If the specific gravity of mixture is 1.5, the contraction in volume when liquids are mixed is