JAMB PRACTISE 2

Which of the following neutralization reactions will have the same enthalpy change?

I. CH₃COOH + NaOH → CH₃COONa + H₂O

II. HCl + NaOH → NaCl + H₂O

III. HCl + NH₄OH → NH₄Cl + H₂O

IV. HNO₃ + NaOH → NaNO₃ + H₂O

• I and II only

• I and III only

• II and III only

• II and IV only

The following gases decolorize bromine water except

• C₂H₆

• C₂H₄

• C₃H₆

• C₂H₂

The smallest unit of a polymer is a

• dissaccaharide

• monomer

• dimer

• monosaccharide

The process by which protein is converted to amino acid is

• polymerization

• hydrolysis

• hydrogenation

• cracking

The production of biogas from the fermentation of waste materials is an example

• combustion

• incineration

• refining

• recycling

Alkanoates can be represented as

• RCH₂OH

• RCONH₂

• RCOOR

• RCOOH

Pollution of rivers by domestic waste causes

• scarcity of nutrients

• an increased level of sediment

• increased presence of heavy metals

• reduced level of dissolved oxygen

The final product obtained when starch is hydrolysed using a dilute mineral acid is

• fructose

• glucose

• maltose

• sucrose

The relative molecular mass of a compound with empirical formula CH₂O is [H = 1, C = 12, O = 16]

• 42

• 45

• 126

• 180

Consider the following reaction equation: CH₂ = CH₂ + H₂ → CH₃CH₃

An important industrial application of the principle is the

• reforming of crude oil

• cracking of crude oil

• hardening of vegetable oil

• fractional distillation of vegetable oil