RRB ALP practice question
0.25 g of an organic compound gave 0.13 g of water after complete combustion. The percentage composition of hydrogen is _________.
From a RRB ALP Science practice set · Science
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Correct answer: (C) 5.78%
5.78%. To calculate the percentage of hydrogen: Molecular weight of water (H₂O) : 2 (H) + 16 (O) = 18 mol/g. Hydrogen's 2 1 contribution in water = = . 18 9 Mass of hydrogen in 0.13 g of water: 1 0.13 × = 0.0144g. 9 Percentage of hydrogen in the organic 𝑀𝑎𝑠𝑠 𝑜𝑓 𝐻𝑦𝑑𝑟𝑜𝑔𝑒𝑛 compound: × 100 𝑀𝑎𝑠𝑠 𝑜𝑓 𝐶𝑜𝑚𝑝𝑜𝑢𝑛𝑑 0 . 0144 = × 100 = 5.78%. 0 . 25
हिंदी में प्रश्न
किसी कार्बनिक यौगिक के 0.25 g के पूर्ण दहन से 0.13 g जल प्राप्त हुआ। हाइड्रोजन की प्रतिशत संरचना _________ है।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 5.78%
5.78%. To calculate the percentage of hydrogen: Molecular weight of water (H₂O) : 2 (H) + 16 (O) = 18 mol/g. Hydrogen's 2 1 contribution in water = = . 18 9 Mass of hydrogen in 0.13 g of water: 1 0.13 × = 0.0144g. 9 Percentage of hydrogen in the organic 𝑀𝑎𝑠𝑠 𝑜𝑓 𝐻𝑦𝑑𝑟𝑜𝑔𝑒𝑛 compound: × 100 𝑀𝑎𝑠𝑠 𝑜𝑓 𝐶𝑜𝑚𝑝𝑜𝑢𝑛𝑑 0 . 0144 = × 100 = 5.78%. 0 . 25
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