313. Who was awarded the Nobel Prize for the discovery of neutron?
(a) James Chadwick
(b) Niels Bohr
(c) J.J. Thomson
(d) C.V. Raman
314. In the case of a concave mirror, the image of an object is
(a) Real, inverted and diminished when the object lies beyond the centre of curvature
(b) Real, erect and diminished when the object lies beyond the centre of curvature
(c) Real, inverted and of the same size as the object when the object , lies between the centre of curvature and focus
(d) Real, inverted and magnified when the object lies at infinity
315. Ribosomes contain a large quantity of
(a) DNA
(b) Haemoglobin
(c) RNA
(d) None of these
316. In human brain, the seat of memory is located in
(a) Cerebellum
(b) Medulla Oblongata
(c) Cortex
(d) Cerebrum
317. The most electro negative element is
(a) Fluorine
(b) Nitrogen
(c) Chlorine
(d) Oxygen
318. The velocity of sound is maximum through
(a) Air
(b) Water
(c) Vacuum
(d) Steel
319. Dichloro diphenyl trichloro ethane (DDT) is a/an
(a) Explosive
(b) Fungicide
(c) Insecticide
(d) Manure
320. Cholera is caused by
(a) The excess of uric acid in the body
(b) The germ salmonella typhae
(c) Vibrio cholera
(d) Streptococcus
321. Green colour of plants is due to the presence of
(a) Chlorophyll
(b) Mitochondria
(c) Xylem
(d) Sugar
322. Diamond glitters due to the phenomenon of
(a) Reflection
(b) Refraction
(c) Scattering
(d) Total internal reflection
323. Pancreas secretes
(a) Hormone insulin
(b) Renin
(c) Vitamin A
(d) Creatin
324. The reaction in which two light nuclei react to form a heavy nucleus accompanied by the release of a large amount of energy is called
(a) Polymerization
(b) Vulcanization
(c) Nuclear fission
(d) Nuclear fusion