1876: The rainbow and the rainbow-like colours seen on a thin film of oil on a water surface are two phenomena. They are
(a) Similar in nature and both are due to refraction of light
(b) Different in nature and rainbow is due to interference of light, while colour of thin film is due to diffraction
(c) Similar in nature and both are due to interference of light
(d) Different in nature and rainbow is due to refraction, while colour of thin film is due to interference of light
1877: Paraffin is a by-product of
(a) Petroleum refining
(b) Processing of agricultural wastes
(c) Cottage industries involving beekeeping
(d) Leather industry
1878: Which one of the following is not a feature of Limited Liability Partnership firm?
(a) Partners should be less than 20
(b) Partnership and management need not be separate
(c) Internal governance may be decided by mutual agreement among partners
(d) It is corporate body with perpetual succession
1879: For reproducing sound, a CD (Compact Disc) audio player uses a
(a) quartz crystal
(b) titanium needle
(c) laser beam
(d) barium titanate ceramic
1880: Assertion (A):
Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R):
DNA fragments can be manipulated using restriction endonucleases and DNA ligases.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT a correct explanation of A
(c) A is true but R is false
(d) A is fasle but R is true