1. (a) Describe how 500 cm' of 0.1 moldm-' H2SO4 could be prepared from 100 cm of 2 moldm stock solution of the acid.
(b) (i) State the effect of aqueous solution of the following salts on litmus paper.
(a) NaNO3
(B) CH3COONa
() Al2(SO4)3
Give a reason for each answer in (b) above
2. Give a reason for each of the following laboratory practices:
(i) KMnO4 solution is not acidified with HNO3 before titration
(ii) FeSO4 solution is usually prepared fresh when needed
(iii) Alkali are not stored in glass stopped reagent bottles.

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aracters to explain it well.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.