Consider the statements given below and choose the correct answer : Assertion [A] : Iron ore is the most widely distributed element of the earth’s crust and it rarely occurs in a free state. Reason [R] : Magnetite is black in colour and has 60% of pure iron.
[A] is true, [R] is false
Iron is found almost everywhere in the earth's crust, but because it combines readily with oxygen and other elements it rarely occurs in a free (native) state; it is mined as ores such as magnetite, haematite, limonite and siderite. The assertion is therefore accepted as true.
Magnetite (Fe3O4) is indeed black and magnetic, but it is the richest iron ore, containing up to about 72% iron, not 60%.
Since the reason gives a wrong iron content, the reason is false while the assertion is true.
Hence, [A] is true, [R] is false.
Similar Questions
Which of the following explain the withdrawal of rural women from total labour force in India?
(i) A large number of rural females are opting for education rather than joining the labour force in agriculture.
(ii) With the rise in the level of income in rural India, rural females engaged in agriculture withdrawing from the labour force and getting engaged in domestic activities.
(iii) Women are not adequately educated in rural areas.
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