Chemistry JAMB, WAEC, NECO AND NABTEB Official Past Questions

The principle of column chromatography is based on the ability of the constituents to

choose the correct answer in the option above. Which of the following is a primary amine?

In the diagram above , X is the “

with conc H₂SO₄ as catalyst
CH₃COOH + C₂H₅OH → CH₃COOC₂H₅ + H₂O

Which of the following statements is true about 2-methylpropane and butane

Two organic compounds K and L were treated with a few drops of Fehling’s solutions respectively . K formed a brick-red precipitate while L, remains unaffected. The compound K is an

The functional groups present in the compound above are

The number of isomers that can be obtained from C₄H₁₀ is

At 25^o and zymase as catalyst,
C₆H₁₂₆ → 2C₂H₅OH + 2CO₂ + energy
The reaction above represented by the equation above is useful in the production of

An organic compound has an empirical formula CH₂O and vapour density of 45.
What is the molecular formula?
[C = 12, H = 1, O = 16]

Which of the following compounds will undergo polymerization reaction?

The ability of carbon to form long chains is referred to as

The constituents of baking powder that makes the dough to rise is

Bronze is preferred to copper in the making of medals because it

The property of concentrated H2SO4 that makes it suitable for preparing HNO3 is its

In the laboratory preparation of oxygen, dried oxygen is usually collected over

The bleaching action of chlorine gas is effective due to the presence of

A few drops of concentrated HNO\(_3\) is added to an unknown solution and boiled for a while. If this produces a brown solution, the cation present is likely to be

The effect of the presence of impurities such as carbon and sulphur on iron is that they

The impurities formed during the laboratory preparation of chlorine gas are removed by

Given that M is the mass of a substance deposited during electrolysis and Q is the quantity of electricity consumed, then Faraday’s first law can be written as
[Electrochemical equivalent]