Which type of the following chemical reaction is CaO + CO2 → CaCO2:...? Mcqs

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Which type of the following chemical reaction is CaO + CO2 → CaCO2:...?

(A) Combination Reaction
(B) Decomposition Reaction

(C) Neutralization Reaction
(D) None

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Which is the best indication that a chemical reaction has taken place...?

(A) Blue powder turns water blue
(B) Metal budding when placed in an unknown liquid

(C) A white substance dissolving in water
(D) None

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Which part of cell controls all the chemical reactions of the cell and it contains chromosomes...?

(A) Cell membrane
(B) Cytoplasm

(C) Vacuoles
(D) Nucleus

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Enzymes catalyze chemical reaction by _____ the activation energy....?

(A) Raising
(B) Lowering

(C) Maintaining
(D) Ignoring

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