The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's ca" /> The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's ca, granite, basalt, igneous rocks, sedimentary rocks" /> The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's ca igneous rocks, granite, basalt, igneous rocks, sedimentary rocks" /> The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's ca"/> The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's ca, granite, basalt, igneous rocks, sedimentary rocks" />
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Chemistry - General Knowledge Questions
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's ca
A)
granite
B)
basalt
C)
igneous rocks
D)
sedimentary rocks

Correct Answer :   igneous rocks

Published On : July 3, 2020
Recent Updates in Chemistry - General Knowledge Questions
Q .
Freons cause great environmental damage. They are
A)
Mixed chlorofluoro-hydrocarbons
B)
Mixed sulphur gases
C)
Mixed carbon gases
D)
Free gases

Correct Answer :   Mixed chlorofluoro-hydrocarbons

Published On : June 12, 2021
Category : Chemistry
Q .
When ants bite, they inject
A)
Stearic acid
B)
Formic acid
C)
Methanol
D)
Glacial acetic acid

Correct Answer :   Formic acid

Published On : June 12, 2021
Category : Chemistry
Q .
The cycling of elements in an ecosystem is called
A)
Chemical cycles
B)
Geological cycles
C)
Geochemical cycles
D)
Biogeochemical cycles

Correct Answer :   Biogeochemical cycles

The biogenetic nutrients are essential elements required by organisms for their body-building and metabolism which are provided by earth and returned to earth after the death of organisms and/or through excreta of animals. So, the correct answer is 'Biogeochemical cycle'

Published On : June 12, 2021
Category : Chemistry

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