KEAM 2018 Physics and Chemistry Paper

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Question : 81 of 120
 
Marks: +1, -0
Consider the following statements concerning N2H4
1. It is an exothermic compound
2. It burns in air with the evolution of heat
3. It has kinetic stability
4. In reduces Fe3+‌to‌Fe2+ in acidic mediumWhich of the following combination is correct?
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