Question

c) The burnt hot air moves backward and the
rocket moves upward​

Answer 1

$\huge\green{ANSWER}$

A rocket moves forward (gains forward momentum) by ejecting out its gases with high energy and momentum in the opposite direction of its propulsion.

So, the assertion about pushing the surrounding air backwards is incorrect but as the rocket pushes the gases out, it gets propelled according to the newton's third law of action reaction.

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Answer 2

Answer:

A rocket moves forward (gains forward momentum) by ejecting out its gases with high energy and momentum in the opposite direction of its propulsion.

So, the assertion about pushing the surrounding air backwards is incorrect but as the rocket pushes the gases out, it gets propelled according to the newton's third law of action reaction.