Which reaction produces carbon dioxide?

A.
cracking of large hydrocarbon molecules
B.
photosynthesis
C.
reaction of a base with a carbonate
D.
thermal decomposition of calcium carbonate
Chemistry
IGCSE&ALevel
CAIE
Exam No:0620_s24_qp_11 Year:2024 Question No:28

Answer:

D

Knowledge points:

11.4.1. State that the bonding in alkanes is single covalent and that alkanes are saturated hydrocarbons
11.4.2. Describe the properties of alkanes as being generally unreactive, except in terms of combustion and substitution by chlorine
11.4.3. State that in a substitution reaction one atom or group of atoms is replaced by another atom or group of atoms
11.4.4. Describe the substitution reaction of alkanes with chlorine as a photochemical reaction, with ultraviolet light providing the activation energy, Ea, and draw the structural or displayed formulae of the products, limited to monosubstitution

Solution:

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