The most plausible explanation for the location of the Thar desert in western India is
Options: the obstruction caused by the Aravalis to the rain-bearing wind that proceeds to the Ganga Valley, the evaporation of moisture by heat, the absence of mountains to the north of Rajasthan to cause orographic rainfall in it, that the moisture carried by the South-west monsoon is driven away by the dry upper air current
Radiocarbon is produced in the atmosphere as a result of
Options: collision between fast neutrons and nitrogen nuclei present in the atmosphere, action of ultraviolet light from the sun on atmospheric oxygen, action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere, lightning discharge in atmosphere
From the following, choose the set in which names of Secretary-Generals of the UNO are arranged in correct chronological order?
Options: U Thant, Kurt Waldheim, Dag Hammarskjoeld, Trygve Lie., Trygve Lie, Dag Hammarskjoeld, U Thant, Kurt Waldheim., Trygve Lie, U Thant , Dag Hammarskjoeld, Kurt Waldheim., U Thant, Dag Hammarskjoeld, Trygve Lie, Kurt Waldheim.
Options: a condition in the international market where nations do not impose customs duty or other taxes on import of goods, market where the price of a commodity is determined by free play of the forces of supply and demand, ports that are exempted from payment of customs duty on articles of commerce, primarily to encourage tourism, None of the above