356: Which of the following chemicals in automobile-exhaust can cause cancer?
(a) Carbon monoxide
(b) Polycyclic hydrocarbons
(c) Lead
(d) Oxides of nitrogen
357: In Mizoram, the settlement pattern is mostly of "linear type" along the ridges, because
(a) the valleys are cooler than the ridges
(b) accessibility is easier on the ridge tops
(c) the ridges are cooler than the valleys
(d) the valleys are densely forested
358: There are 10 identical coins and each one of them has H engraved on its one face and T engraved on its other face. These 10 coins are lying on a table and each one of them has H face as the upper face.
In one attempt, exactly four (neither more nor less) coins can be turned upside down. What is the minimum total number of attempts in which the T faces of all the 10 coins can be brought to be the upper faces ?
359: Matriarchical system obtains among the
(a) Nagas, Nairs and Meenas
(b) Nairs and Khasis
(c) Bhils, Nairs and Khasis
(d) Nagas and Khasis
360: Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?
(a) Microscope
(b) Lead plate
(c) Scintillation counter
(d) Spectrophotometer