(a) (i) Arrange the following elements in order of their increasing atomic radjo•z.
9F,6C, IN
(ii) the one which of the following groups the largest energy.
(A) 28.1, (B) 2-8.5 (C)
(iii)Write dov€n the electon dot-cross structure of PF$.
(iv) Give the position in the l*tiodic table ofelenent DAI.
(b) kcatain mass of gas occupies 942 cm3 at 2.2' C. At what tempeature in • C will the gas occupy 311 cm) under saxne pressure?
(c) On passing a current of 0.75 A for 25 minutes through a copper (Il) sulphne solution, 0369g of copper is deposited. Calculate the relative atomic mass of copper.
(One 96500 coulombs)
(d) falance the following redox reactions using either oxidation number method or ion electron (half rectim)
(i) Mg + NO Mgo Na
(ii) Broy- + r + •-9 Br- + la + H20
(e) (i) Define a catalyst "reversible reaction",
(ii) Using Le Qutelier's principle, predict the effect ofdecreasing the temperattge of the following equilibrium system.
Y
