2051: Physico-chemical characteristics of water in water sources undergo changes due to
(a) aquatic macrophytes
(b) aquatic fungi
(c) effluents
(d) evapotranspiration
2052: Painted greyware is attributed to
(a) Vedic period
(b) Guptas
(c) Mauryas
(d) Indus valley civilisation
2053: Who is the scientist in whose honour the Chandra X-ray telescope has been named ?
(a) Chandrasekhar Venkat Raman
(b) Jagdish Chandra Bose
(c) Prafulla Chandra Roy
(d) Subrahmanyan Chandrasekhar
2054: Which one of the following scholars suggests the earth's origin from gases and dust particles ?
(a) James Jeans
(b) H. Alfven
(c) F. Hoyle
(d) O. Schmidt
2055: The maximum gap between two sessions of the Parliament can be of:
(a) Six months
(b) Three months
(c) Nine months
(d) Twelve months