4496: Which one of the following statements is not correct?
(a) The boiling point of an aqueous solution is higher than that of pure water
(b) Addition of solutes to a solution causes an increase in its water potential
(c) The vapour pressure of the water in a solution is lower than that of pure water
(d) When a solution is separated from water by a semi permeable membrane, water movement can be prevented by applying pressure to the solution
4497: Which one of the following submitted in 1875 a petition to the House of Commons demanding India's direct representation in the British Parliament?
(a) The Deccan Association
(b) The Indian Association
(c) The Madras Mahajan Sabha
(d) The Poona Sarvajanik Sabha
4498: Which one of the following statements is correct?
(a) Prions are the smallest free-living cells
(b) The cell wall of Mycoplasmas is made up of amino sugars
(c) Viroids consist of a single-stranded RNA molecule
(d) Rickettsias lack cell wall
4499: Consider the following pairs : Region Well-known for the production of
1. Kinnaur : Area nut
2. Mewat : Mango
3. Coromandel : Soya bean
Which of the above pairs is/are correctly matched ?
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None
4500: Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?
(a) Lithium and mercury
(b) Lithium and osmium
(c) Aluminium and osmium
(d) Aluminium and mercury