2666: The yield versus fertilizer input is shown in the graph.
Consider the following statements based on this graph :
I. Yield rate is zero at B and C.
II. There is no yield with no fertilizer input.
III. The yield is minimum at D.
IV. The yield is neither minimum nor maximum at C.
Which of the above statements are correct ?
(a) I, II and IV
(b) III and IV
(c) II and III
(d) I, III and IV
2667: The motive behind Shahjahan's Balkh campaign was to
(a) secure a friendly ruler in Balkh and Badakshan which bordered Kabul
(b) conquer Samarqand and Farghana, the Mughal homelands
(c) fix the Mughal frontier on the scientific line, the Amu Daria
(d) expand the Mughal Empire beyond the sub-continent
2668: Nobel Prize winning scientist James D. Watson is known for his work in which area ?
(a) Metallurgy
(b) Genetics
(c) Environmental protection
(d) Meteorology
2669: The working of the quartz crystal In the watch is based on the
(a) Photoelectric Effect
(b) Johnson Effect
(c) Piezo-electric Effect
(d) Edison Effect
2670: With reference to ionic compounds, consider the following statements:
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are good conductors of electricity.
Which of these statements is/are correct?
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2