1666: Regarding the atom of a chemical element, the magnetic quantum number refers to
(a) orientation
(b) shape
(c) size
(d) spin
1667: Water hyacinth is related to:
(a) Lemna
(b) Pistia
(c) Eichhornia
(d) None of these
1668: Heat from the sun is received by the earth through:
(a) Conduction
(b) Convection
(c) Radiation
(d) None of the above
1669: Indias ranking in the Ease of Doing Business Index is sometimes seen in the news. Which of the following has declared that ranking?
(a) Organization for Economic Cooperation and Development (OECD)
(b) World Economic Forum
(c) World Bank
(d) World Trade Organization (WTO)
1670: Which one of the following types of erosion is responsible for the formation of Chambal Ravines ?
(a) Splash
(b) Sheet
(c) Rill
(d) Gully