railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Chemistry Surface Chemistry

उत्प्रेरकाची क्रिया कमी करणाऱ्या पदार्थांना काय म्हणतात?

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नियंत्रक
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प्रवर्तक
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विषाक्तक
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प्रारंभक
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