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যে পদার্থকে অনুঘটকের সঙ্গে মিশিয়ে দিলে অনুঘটকের কর্মক্ষমতা বৃদ্ধি পায়, তাকে উদ্দীপক বলে।
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Answer ( 1 )
যে পদার্থকে অনুঘটকের সঙ্গে মিশিয়ে দিলে অনুঘটকের কর্মক্ষমতা বৃদ্ধি পায়, তাকে উদ্দীপক বলে।