Question

.. Do you know which of the following sentences is in-correct.
a) Cutting of log of wood into pieces is a physical change.
b) Limewater turns milky on passing CO2 through it.
c) Hydrogen gas is produced when acetic acid is added to a solution of a sodium
hydrogen carbonate.
d) Explosion of a firework is a chemical change.​

Answer 1

Answer:

Hydrogen gas is produced when acetic acid is added to a solution of a sodium.

Answer 2

Answer:

Hydrogen gas is produced when acetic acid is added to a solution of a sodium

Explanation:

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