46.  Consider the following statements:
1.Diabetes insipidus causes diuresis, i.e., urine is passed out several times more than in a normal person.
2.A person with diabetes insipidus suffers from very low or no output of vasopressin.
3.Such diabetic patients drink large quantity of water.
4.Vasopressin is secreted by hypothalamus and stored in posterior pituitary. Which of the above statements is/are correct?

47.  In cold countries alcohol is preferred to mercury as a thermometric liquid because

48.  O2 released in the process of photosynthesis comes from

49.  The two isotopes of uranium, 235U and 238U have
1.equal number of protons
2.equal number of neutrons
3.92 protons each Which of the above statements is/are correct?

50.  Such fish that are found in rivers in Australia and Africa where water is too foul to support life with the usual gills are
1.dipnoins
2.lung fishes
3.sturgeons
4.guppies

51.  By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?

52.  Heavy water
1.contains more dissolved air
2.contains dissolved minerals and salts
3.has deuterium in place of hydrogen
4.is used in nuclear reactors The correct statements are:

53.  A body weighs slightly more at the poles than at the equator because

54.  Pulses are amongst the most important group of food plants, second in importance only to the cereals. Why are they considered so important?
1.They are the most important source of proteins not only for the human population but also for animals, both herbivores and carnivores.
2.They save us billions of rupees every year in fertilizer cost by fixing atmospheric nitrogen, being the only group of crop plants that is capable of doing so Select the correct answer from the following.

55.  Some scientist and discovery pairs are given below:
1.Bohr-Model of hydrogen atom
2.Einstein-Photoelectric effect
3.Chadwick-Neutron
4.De Broglie-Matter waves Which of the above pairs are correctly matched?

56.  Television viewers using dish antenna to receive satellite (DTH) signals do not receive signals during rain because: (1) Their antennas are small (2) Rain droplets absorb the energy of radio waves (3) Rain droplets disperse the energy of radio waves from their original direction. Which of the above statement/statements is /are correct?

57.  A colour-blind man marries a normal woman whose father was colour-blind. They have 3 children, two daughters and ason. What are the chances of their children being colour-blind?

58.  When the speed of a body is doubled, its kinetic energy becomes

59.  Who among the following demonstrated experimentally that simple organic molecules like sugars and amino acids could be produced from inorganic molecules if early earth atmosphere is created

60.  Which of the following rays are produced when very high energy electrons are stopped suddenly at a metal target?