Question

(1) Which one of the following processes involve chemical reactions ?
(a) Storing of Oxygen gas under pressure in a gas cylinder.
(b) Liquefaction of air.
(c) Keeping petrol in china dish in open.
(d) Heating copper wire in presence of air at high temperature.​

Answer 1

Answer:

b number is the answer of this question

Answer 2

$\huge{\mathfrak{\purple{Question}}}$

(1) Which one of the following processes involve chemical reactions ?

(a) Storing of Oxygen gas under pressure in a gas cylinder.

(b) Liquefaction of air.

(c) Keeping petrol in china dish in open.

(d) Heating copper wire in presence of air at high temperature.

$\huge{\mathfrak{\purple{Answer}}}$

(b) Liquefaction of air.

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