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শিক্ষাবর্ষঃ ২০১৩-২০১৪
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To increase the poisonous action of catalysts
To decrease the poisonous action of catalysts
To increase the catalytic ability of catalysts
To decrease the catalytic ability of catalysts
90% ethanol and 10% water
95.6% ethanol and 4.4% water
70% ethanol and 30% water