The percentage of chlorine in fresh bleaching powder is roughly
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16%
(A) 50 to 60
49%
(B) 30 to 35
24%
(C) 40 to 50
11%
(D)20 to 25
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Service connections to consumers houses, are generally provided with
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6%
(A) Copper pipes
12%
(B) Hume pipes
44%
(C) Galvanised iron pipes
39%
(D)P.V.C. pipes
High pH value of water does not produce
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17%
(A) Incrustation
42%
(B) Sediment deposits
28%
(C) Tuberculation
13%
(D)None of these
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