What do you expect the nature of hydrides is, if formed by elements of atomic numbers 15, 19, 23, 44 with dry dilhydrogen? Compare their behaviour towards water.

5

(a)

How would you prepare dihydrogen from a substance other than water?

5

(a)

What mass of hydrogen peroxide will be present in 2L of a 5M solution?

5

(a)

Calculate the mass of oxygen which will be liberated by the decomposition of 200mL of this solution.

5

(a)

Complete the following chemical reactions and classify the above into (a) hydrolysis,(b) redox and (c) hydration reactions.
\(PbS(s)+{ 4 }H_{ 2 }{ O }_{ 2 }(aq)\rightarrow \)

5

(a)

Complete the following chemical reactions and classify the above into (a) hydrolysis,(b) redox and (c) hydration reactions.
\(MnO_{ 4 }^{ - }(aq)+{ H }_{ 2 }{ O }_{ 2 }(aq)\rightarrow \)

5

(a)

Complete the following chemical reactions and classify the above into (a) hydrolysis,(b) redox and (c) hydration reactions.
\(CaO(s)+H_{ 2 }O(g)\rightarrow \)

5

(a)

Complete the following reactions.
\({ H }_{ 2 }(g)+{ M }_{ m }{ O }_{ 0 }(s)\underrightarrow { \Delta } \)

5

(a)

Complete the following reactions.
\({ C }_{ 3 }{ H }_{ 8 }(g)+3{ H }_{ 2 }O(g)\overset { \triangle }{ \underset { Catalyst }{ \rightarrow } } \)

5

(a)

What do you understand by the terms:
(i) Hydrogen economy
(ii) hydrogenation
(iii) syngas
(iv) water-gas shift reaction
(v) fuel-cell?

5

(a)