21.
Marble comes under which category of rocks?

22.
Which of the following are correctly matched?
1. Gneiss : Metamorphic
2. Granite : Igneous
3. Sandstone : Sedimentary

23.
Which of the following is/are the examples of the sedimentary rocks?
1. Limestone
2. Dolomite
3. Breccia
4. Coal

24.
Arrange the following soil particle by size in the descending order:
I. Gravel
II. Clay
III. Silt
IV. Sand

25.
Which of the following are true with regard to igneous rocks?
I. They are formed inside the earth, under great pressure
II. They do not occur in layer
III. They are mostly crystalline in nature
IV. They contain fossils

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