+1 vote
ago in Construction & Building Materials by (188k points)
Pure limestones are indicated by _________ colour.

(a) Brown

(b) Blue

(c) Grey

(d) White

I have been asked this question in an international level competition.

My question is based upon Lime topic in portion Glass, Lime, Clay Products & Bricks of Construction & Building Materials

1 Answer

+1 vote
ago by (1.2m points)
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Best answer
Right option is (d) White

To explain: Pure limestones are indicated by white colour. However, hydraulic limestones are indicated by brown, bluish-grey or some dark colour.

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