1.name three types of chemical reaction.
1b.explain any two with equation.
1c.three characteristics of catalyst.
1d.diffrenciate btw promoter and prohibitor,
2.state arrhenius theory,
2b.what is hydrolysis of salt,
2c,difference btw closed and open system,
2d.define buffer solution,
3.state le chatellier principle,
3b,state the effect of ,pressure,temp,catalyst on equilibrum,
3c,describe with the aid of diagram how hydrogen gas is used as reducing agent for named oxide,1,cuo,pbo,zno.
CHEMISTRY OBJECTIVE ANSWERS
CHEMISTRY THEORY ANSWERS
6ai. Polymerization is the joining together of similar molecule of unsaturated hydro carbon forming a single giant molecule called Polymer with or without d eliminations of small molecules.
6aii additional Polymerization condensation Polymerization
6aiii Rubber ii polythene
6bi] Heat and catalyst
ii] to ripen fruit
iii] to prepare polymer
1a.] Chain Reaction
ii. Reversible and irreversible reactions
iii]. endothermic and exothermic reactions
1aii catalyst is d ability of atoms of d same element to link dem selves while otcane no expresses d octane rating of petroleum
Solution to 1c.
Xcharatics of catalyst
i].artel the rate of chemical reaction
ii].a catalyst has no effect on the equilibrum of reversible reaction
iii].remain unchange at the end of reaction
4a i By diffusion
b i ethannol
2a) Only the Arrhenius theory speaks about the need of water, according to Bronsted, acid base reactions can occur in gaseous state without water. (for example NH3+HCl).
3) Decomposition : A decomposition reaction is the opposite of a synthesis reaction – a complex moleculebreaks down to make simplerones. These reactions come inthe general form: AB —>A + B
One example of adecomposition reaction is the electrolysis of water to make oxygen and hydrogengas: 2 H 2 O —>2 H 2 + O 2
5b. ¡. Pollution:can be defined as the process of making the air impure due to contamination with harmful or prisonnus subtance
=pollutant:there are subtance that are used for polluting the air,eg oxides of carborn etc.
5b¡¡.Air pollutant oxide of sulpluer and nitrogen.
Water polution oilspills.
5c¡. Suphe soturated solutionin the one which continuns more of the solute than it can nomally hold at that temparature.
Q5. ¡ Allotropes of carbon=diamong =graphite
¡¡ Graphite conducts electricity
¡¡¡ this is becouse of the presence of mobite electrition in the erystall lattice