Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...
CBSE Class 12 Important Chemical Reactions:The CBSE Class 12 Chemistry exam for 2025 is scheduled for February 27, 2025, from 10:30 a.m. to 1:30 p.m. The exam will cover physical, inorganic, and ...
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