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
Which of the following are the members of SAARC (South Asian Association for Regional Cooperation)?
Options: Bhutan, Bangladesh, India and Pakistan, Bhutan, Bangladesh, the Maldives, Nepal, India, Pakistan, Afghanistan and Sri Lanka, Afghanistan, Pakistan, Thailand, Indonesia, Nepal and Sri Lanka, None of the above
Which of the following pairs of country and the purpose for which U.N. Peace Keeping Force is maintained is correctly is correctly matched?
Options: Cyprus - to maintain peace between the two dominant ethnic groups in the country, Mozambique - To supervise a referendum, El Salvador - to deliver humanitarian aid, Lebanon - For supervising a 1992 accord
Options: the complete loss of particular atoms or the compounds from the weathered surface, the addition of specific atoms or compounds to the weathered surface, a breakdown of one mass in to two or more masses, with no chemical change in the mineral or rock, All of the above