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A ray of light is incident normally on one of the faces of a prism of apex angle 30⁰ and refractive index . The angle of deviation of the ray is …………………… degrees.

Chemistry

The compound which has one isopropyl group is:
(a) 2, 2, 3, 3-tetramethylpentane
(b) 2, 2-dimethylpentane
(c) 2, 2, 3-trimethylpentane
(d) 2-methylpentane

Mathematics

The locus of the poles of the line lx + my + n = 0 with respect to circles which touch the x-axis at the origin is
(a) (lx + my) y = nx
(b) (mx – ly) y = nx
(c) (lx – my) x = ny
(d) (lx – my) y = nx

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