Subject :NSO Class : Class 3
Select the correct statement.
A The tiny grains that make up a rock are called minerals and there are always more than one mineral in a rock.
B Sandstone is the hardest rock while granite is the softest rock.
C Rocks break under the effect of sun, wind, water etc. and form humus that makes soil productive.
D Talc is the softest mineral while diamond is the hardest mineral.
Ans 1:
Class : Class 3
option c is the correct option because granite and marble are hard to make the floor and cannot break easily but chalk can break easily.
Ans 2:
Class : Class 7
Ans 3:
Class : Class 6
The correct answer is D
Ans 4:
Class : Class 3
c