Question

please solve it help me​

Answer 1

Answer:

1)i)petroleum is called black gold as com when crude oil is extracted from the land it is black in colour. crude meaning:not yet refined.

ii) Petrochemicals are chemical compounds that are obtained from crude oil and are essential part or chemical industry.

2)i) Spontaneous combustion is the condition in which oxygen in the air is absorbed into the coal during mining and transportation process of coals.

2 )ii)The one characteristic of ideal fuel is that it is eco-friendly and has proper ignition temperature

3)i) Incident ray is the Ray of light falling on the surface separating two mediums.

3)ii)Angle of reflection is the angle formed between reflected Ray and the normal Ray.

Explanation:

HOPE IT HELPS YOU..

Answer 2

it's OK

I am also sorry

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