The reagent among the following that does not reduce an aryl nitro compound to an amine is:

1. H2(excess) / Pt

2. LiAlH4 in ether

3. Fe and HCI

4. Sn and HCI

Subtopic:  Urea & Nitro Compound |
 64%
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In nitration of benzene using a mixture of conc. H2SO4 and conc. HNO3, the species that initiates the reaction is :

1. NO2
2. NO+
3. NO2+
4. NO2-

Subtopic:  Urea & Nitro Compound |
 79%
From NCERT
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