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Canada balsam...

Question

Canada balsam, a mounting agent used to make permanent slides, is obtained from the species of _____________.

A

Abies

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B

Cedrus

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C

Pinus

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D

Juniperus

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Solution

The correct option is B Abies
Canada balsam is obtained from Abies balsamea. The resin does not crystallise or granulate on drying. It has a high refractive index as that of glass and is used as a mounting medium for microscopic objects and as a cement for lenses in optical work.
So the correct option is A.

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