One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； August 02
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Multiple-choice question: Calcium carbide contains compounds such as calcium sulfide and calcium phosphide; the maximum limits of these sulfides and phosphides that can cause an spontaneous explosion of acetylene gas after the hydrolysis reaction produces acetylene gas are ( ). A、H2S≤ 0.15% PH3 0.08%; B、H2S 0.008%≤ PH3 0.015%; C、H2S≤ 0.08% PH3 0.15%; D、H2S 0.008%≤ PH3 0.15%; Answer: A、H2S≤ 0.15% PH3 0.08%;
A. H2S ≤ 0.15%, PH3 0.08%
Calcium carbide contains compounds such as calcium sulfide and calcium phosphide; after the hydrolysis reaction produces acetylene gas, the maximum allowable levels of these sulfides and phosphides that can cause an spontaneous explosion of acetylene gas are (C, H2S ≤ 0.08%, PH3 ≤ 0.15%).
C, H2S ≤ 0.08% PH3 0.15%;
A. H2S ≤ 0.15% , PH3 0.08%;
Calcium carbide contains calcium sulfide, calcium phosphide, etc.; the maximum limits of sulfides and phosphides that can cause an spontaneous explosion of acetylene gas after the hydrolysis reaction produces acetylene gas are (A). A. H2S ≤ 0.15% and PH3 ≤ 0.08%; B. 0.008% ≤ H2S ≤ 0.015% and PH3 ≤ 0.015%; C. H2S ≤ 0.08% and PH3 ≥ 0.15%; D. 0.008% ≤ H2S ≤ 0.15% and PH3 ≥ 0.15%;
C, H2S ≤ 0.08% PH3 0.15%;