Surface of Mars appears red in colour because of ______.

red sand

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iron oxide

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dust

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oxygen

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Solution

The correct option is B iron oxide
$∙$ The rocks on the surface of Mars contain lots of iron, and when exposed to the atmosphere iron rusts into iron oxide.
$∙$ This iron oxide is reddish in colour and it makes the surface of Mars appear to be red.

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Surface of Mars appears red in colour because of ______.

The correct option is B iron oxide∙ The rocks on the surface of Mars contain lots of iron, and when exposed to the atmosphere iron rusts into iron oxide. ∙ This iron oxide is reddish in colour and it makes the surface of Mars appear to be red.

The correct option is B iron oxide
$∙$ The rocks on the surface of Mars contain lots of iron, and when exposed to the atmosphere iron rusts into iron oxide.
$∙$ This iron oxide is reddish in colour and it makes the surface of Mars appear to be red.