416: The ruler of which one of the following States was removed from power by the British on the pretext of misgovernance?
(a) Jhansi
(b) French
(c) Awadh
(d) Satara
417: The working principle of a washing machine is
(a) centrifugation
(b) dialysis
(c) reverse osmosis
(d) diffusion
418: A survey was conducted on a sample of 1000 persons with reference to their knowledge of English, French and German. The results of the survey are presented in the given Venn diagram. The ratio of the number of persons who do not know any of the three languages to those who know all the three languages is
(a) 1/27
(b) 1/25
(c) 7/550
(d) 175/1000
419: Which one of the following is the best strategy for environment-friendly sustainable development in Indian agriculture?
(a) Expansion of cultivable land, increased use of superphosphate, urea and effective biocides
(b) Wider popularization of high-yielding crop varieties, better and more frequent irrigation and increased frequency of aerial sprays of inorganic fertilizers and pesticides
(c) Mixed cropping, organic manures, nitrogen-fixing plants and pest resistant crop varieties
(d) Improved farm implements and machinery, use of potent insecticides to minimise post-harvest grain losses and mono culture cropping practices
420: The battle of Dharmat was fought between
(a) Muhammad Gori and Jai Chand
(b) Babar and the Afghans
(c) Aurangzeb and Dara Shikoh
(d) Ahmad Shah Durrani and the Marathas