Ethene undergoes which type of reaction with bromine water?
A. Oxidation
B. Dehydration
C. Substitution
D. Addition
Answer: Option D
Solution (By JKExamLibrary)
Ethene (C₂H₄) adds Br₂ across the double bond to form 1,2-dibromoethane. Bromine water decolorizes, a test for unsaturation. Alkanes undergo substitution.
Explanation:
In graphite, each carbon is sp² hybridized and bonded to three others, leaving one p-orbital electron delocalized across the layer. These free electrons allow conduction parallel to layers.
Explanation:
Niels Bohr in 1913 proposed the planetary model where electrons revolve in certain allowed circular orbits without radiating energy, with quantized angular momentum. Rutherford proposed the nuclear model but did not specify quantized orbits. Thomson gave plum pudding. Chadwick discovered neutron.
Explanation:
Calorific value is the heat produced by combustion of unit mass, expressed in energy per mass: kJ/kg, J/g, kcal/kg. Higher CV means better fuel. Determined by bomb calorimeter.
No comments yet. Be the first to start the discussion!