engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 General Science Chemistry Chemical Reaction

खालीलपैकी कशाचा उपयोग आतिषबाजी साठी होतो?

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सोडियम 
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कॅल्शिअम 
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सल्फर 
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फॉस्फरस

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