Short Answer TypeState the effect of the following on the reaction 2SO2(g)+O2(g) 
2SO3(g)+189.4 kJ at
equilibrium:
(i) Temperature is increased.
(ii) Concentration of SO2 is increased.
(iii) Pressure is decreased.
(iv) Helium is added at constant pressure.
(i) Temperature is increased – the equilibrium will shift to the backward direction as the increase in temperature will be compensated by absorbing heat.
(ii) Concentration of SO2 is increased – the equilibrium will shift to the right so that additional SO2 is used up to form SO3.
(iii) Pressure is decreased – the equilibrium will shift to the left to produce more number of moles.
(iv) Helium is added at constant pressure – it will result in increase in volume. As a result, the number of molecules per unit volume will decrease. This stress is relieved by the formation of more molecules and the equilibrium will shift to the left.
(i) 0.3605 g of a metal is deposited on the electrode by passing 1.2 amperes of current for 15 minutes through its salt solution. The atomic weight of the metal is 96. What is the valency of the metal?
Write the formula of the following compounds:
(i) Triamminetriaquachromium(III)chloride
(ii) Potassiumhexacyanoferrate(III)
Name the types of isomerism shown by the following pairs of compounds:
(i) [CoCl(H2O)(NH3)4]Cl2 and [CoCl2(NH3)4]Cl.H2O
(ii) [Pt(NH3)4][PtCl6] and [Pt(NH3)4Cl2][PtCl4]
For the complex ion of [Co(NH3)6]3+ :
(i) State the hybridisation of the complex.
(ii) State the magnetic nature of the complex.
Write balanced chemical equations for the following reactions:
(i) Ozone and lead sulphide.
(ii) Chlorine is passed through hot concentrated NaOH solution.
(iii) Sulphuric acid is treated with phosphorous
Give reasons for the following:
(i) Zn+2 salts are white but Cu2+ salts are blue in colour.
(ii) Fluorine gives only one oxide but chlorine gives a series of oxides.
How is potassium dichromate prepared from a sample of chromite ore? Give balanced equations for the chemical reactions involved.
For the molecule IF7:
(i) Draw the structure of the molecule.
(ii) State the hybridisation of the central atom.
(iii) State the geometry of the molecule
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