Unit Ii Sample Practice Paper for Edexcel as
VIHS/ Department of Chemistry
Chemistry Revision Unit II (Edexcel)
(01) a) When lithium nitrate and sodium nitrate are heated separately, both decompose giving oxygen gas as one of the products.
(i) Which of these two nitrates would decompose at the lower temperature?
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(ii) Give the name of any other product formed when sodium nitrate is heated.
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(iii) Write an equation for the thermal decomposition of lithium nitrate.
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b) Explain trend in thermally stability of the nitrates of group II metals
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(02) The manufacture of sulphuric acid is based on the equilibrium reaction 2SO2(g) + O2(g) 2SO3(g) ∆H = - 197 kJ mol—1
a) The equilibrium is a dynamic equilibrium; explain the nature of such an equilibrium.
..........................................……….............…………………………………………...........
Chemistry Revision Unit II (Edexcel)
(01) a) When lithium nitrate and sodium nitrate are heated separately, both decompose giving oxygen gas as one of the products.
(i) Which of these two nitrates would decompose at the lower temperature?
.........................................................…………………………………………....................
(ii) Give the name of any other product formed when sodium nitrate is heated.
.........................................................…………………………………………....................
(iii) Write an equation for the thermal decomposition of lithium nitrate.
.........................................................…………………………………………....................
b) Explain trend in thermally stability of the nitrates of group II metals
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
.......................................................................................................................................
(02) The manufacture of sulphuric acid is based on the equilibrium reaction 2SO2(g) + O2(g) 2SO3(g) ∆H = - 197 kJ mol—1
a) The equilibrium is a dynamic equilibrium; explain the nature of such an equilibrium.
..........................................……….............…………………………………………...........