Number 2 is the correct answer
A metallic conductor moving at a constant speed in a magnetic field may develop a voltage across it. This is an example of Motional emf
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Ethanol C₂H₆O
Explanation:
When ethanol (CH₃-CH₂-OH) is heated in the presence of the sulphuric acid (H₂SO₄) it will produce ethylene (CH₂=CH₂ ) and water (H₂O).
CH₃-CH₂-OH → CH₂=CH₂ + H₂O
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sulphuric acid
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C. NO2 is covalent. Hope this helps!