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PLE 2024 Biochemistry Questions and Answers Latest Update
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PLE 2024 Biochemistry Questions and Answers Latest Update
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Solution 2024/2025Pepper
PLE 2024: Biochemistry Questions and
Answers Latest Update 2024-2025
Law of Conservation of Mass ANS✔✔ Mass of material before reaction =
after reaction
Mass: neither created nor destoryed
Law of Definite Composition ANS✔✔ Chemical compound
Regardless of source or method of preparation
Have the same composition (proportion by mass)
Law of Multiple Proportions ANS✔✔ 2 elements form more than one
compound
Masses of one element combined with fixed mass of another -> Ration of
small whole numbers
Chemical reaction ANS✔✔ Process in which a substance is changed into one
or more substances
Physical Change ANS✔✔ When you simply cut the love lettee of your ex
, Solution 2024/2025
Pepper
Chemical Equation ANS✔✔ Standard method for communicating with one
another about chemical reactions
Chemical Symbols ANS✔✔ To show what happens during a chemical
reaction
Plus Sign ANS✔✔ Reacts with
Arrow Sign ANS✔✔ To yield
H2 + O2 -> H20
Which is the reactant?
Which is the product? ANS✔✔ H2 and O2 - reactants
H20 - products
Reactants ANS✔✔ Starting materials in a chemical reaction
Products ANS✔✔ Substance formed as a result of a chemical reaction
Irreversible Reactions ANS✔✔ Represented by a single arrow (->)
Tail side: side of the reactants
Arrowhead : side of the products
Reversible Reactions ANS✔✔ Bidirectional arrow
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