456: As per the 1991 Census, which one of the following states has a lower population density than the other three ?
(a) Sikkim
(b) Nagaland
(c) Meghalaya
(d) Manipur
457: Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition ?
(a) When inhaled into the human body, CO is converted into CO2
(b) The inhaled CO has much higher affinity for haemoglobin as compared to oxygen
(c) The inhaled CO destroys the chemical structure of haemoglobin
(d) The inhaled CO adversely affects the respiratory centre in the brain
458: In the Parliament of India, the purpose of an adjournment motion is
(a) to allow a discussion on a definite matter of urgent public importance.
(b) to let opposition members collect information from the ministers
(c) to allow a reduction of specific amount in demand for grant
(d) to postpone the proceedings to check the inappropriate or violent behaviour on the part of some members.
459: Earliest Indian coins belonged to which period?
(a) 5th century B.C.
(b) Ashoka's reign.
(c) 1st century A.D.
(d) 3rd century A.D.
460: The correct sequence of different layers of the atmosphere from the surface of the Earth upwards is
(a) Troposphere, Stratosphere, Ionosphere, Mesosphere
(b) Stratosphere, Troposphere, Ionosphere, Mesosphere
(c) Troposphere, Stratosphere, Mesosphere, Ionosphere
(d) Stratosphere, Troposphere, Mesosphere, Ionosphere