441. Chemically, marble is known as
A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.

442. Granite mainly composed of quartz and felsper particles, is obtained from
A. sedimentary rocks
B. metamorphic rocks
C. igneous rocks
D. all the above.

443. Gniess is obtained from
A. igneous rocks
B. metamorphic rocks
C. sedimentary rocks
D. sedimentary-metamorphic rocks.

444. Dolomite is a lime stone which contains carbonate of magnesia upto
A.15%
B.20%
C.25%
D.45%

445. Black marble is generally found in the district of
A. Jodhpur
B. Jaipur
C. Jabalpur
D. Jaisalmer

446. The softest rock is
A. marble
B. diamond
C. talc
D. quartz.

447. Shingle is
A. decomposed laterite
B. argillaceous rock
C. water bound pebbles
D. silicious rock.

448. The rock generally used for roofing, is
A. granite
B. basalt
C. slate
D. pumice

449. Good quality stones must
A. be durable
B. be free from clay
C. resist action of acids
D. all the above.

450. A good quality stone absorbs water less than
A.5%
B.10%
C.15%
D.20%

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