Multiple choice

4 litre of a solution having 10% acid was mixed with 5 litre of a solution having 16% acid. Six litre of pure acid was then added to the resulting solution. The concentration of acid in the final solution is: 10% अम्ल वाले 4 लीटर घोल को 16% अम्ल वाले 5 लीटर घोल में मिलाया गया है उसले बाद उस मिश्रण में 6 लीटर शुद्ध अम्ल भी मिलाया गया। अंतिम घोल में अम्ल की सांद्रता कितनी होगी?

  1. 48%

  2. 50%

  3. 54%

  4. 60%

  5. None of these / इनमे से कोई नही
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A Correct answer
Explanation

First solution: 4L with 10% acid = 0.4L acid. Second: 5L with 16% acid = 0.8L acid. Mixed: 1.2L acid in 9L solution. Add 6L pure acid: total acid = 7.2L, total volume = 15L. Concentration = (7.2/15) × 100 = 48%.

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