The main difference between diamond and graphite is:
A. Arrangement of carbon atoms
B. Carbon content
C. Chemical formula
D. Presence of hydrogen
Answer: Option A
Solution (By JKExamLibrary)
Both diamond and graphite are allotropes of carbon, having the same chemical element but different structural arrangements: diamond has a tetrahedral 3D network, graphite has layered planar structure. This leads to differing physical properties (hardness, conductivity).
Explanation:
Alpha particles are relatively heavy (4 amu) and doubly charged (+2), so they interact strongly with matter, losing energy rapidly via ionization. They can be stopped by a sheet of paper or a few centimeters of air. Beta particles (lighter, faster electrons) penetrate further. Gamma rays (uncharged EM waves) are most penetrating. Alpha emitters are hazardous if ingested or inhaled.
Explanation:
Oxidation is the gain of oxygen or loss of electrons. Here, Carbon (C) gains oxygen to form Carbon dioxide (CO₂), so Carbon is oxidized. Lead oxide (PbO) loses oxygen to form Lead (Pb), so PbO is reduced. This is a classic redox reaction where both processes occur simultaneously.
Explanation:
Aluminium displaces iron from iron(III) oxide because Al is more reactive. This is a single displacement (or thermite) reaction. Also redox: Al oxidized, Fe reduced. Combination: one product; decomposition: one reactant.
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