Chemical Process
Presence of sodium tripolyphosphate (an additive) in synthetic detergent

None of these
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
Does not allow redeposition of dirt on the cleaned surface
Inhibits its corrosive effects

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Chemical Process
Pick out the wrong statement pertaining to nitric acid.

About 90% of nitric acid is manufactured by Ostwald
It is a strong mono basic acid which reacts with almost all the metals except noble metals
Arc process of nitric acid manufacture is economical as compared to Ostwald
Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO₂)

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