Chemistry JAMB, WAEC, NECO AND NABTEB Official Past Questions

A small quantity of solid ammonium chloride (NH4Cl) heated gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo

The acid in electrolysis of water is dilute

Vulcanization involve the removal of

The gas that is most useful in protecting humans against solar marathon is

In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by

Iron is often galvanized in order to

Which of these require crystallization most?

The filter in the cigarette reduce the nicotine construct by

One of the methods used for combating air pollution is

Iron is often galvanized in order to

The energy value of petrol can be determined by a

The reaction of sucrose with dilute HCI produces

A suitable reagent for distinguishing between ethanoic acid ethanol is

Which of the following types of alkanols undergo oxidation to produce alkanoic acids? 1. Primary alkanols 11. Secondary alkanols 111. Tertiary alkanols

Which of the following statements about soapless detergents is correct? They

The reaction between ethene and chlorine to form 1, 2-dichloroethane is

The following compounds are hydrocarbons except

When alkynes are hydrogenated completely they produce compounds with the general molecular formula

Which of the following compounds can be represented by the molecular formula C₂H₆O?

Which of the following processes takes place during the production of margarine from vegetable oils?

When concentrated sodium chloride solution is electrolysed using inert electrodes, the products are