JAMB 2010 Chemistry Past Questions & Answers (UTME Practice)

Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V), Ca(NO₃)₂. [Ca = 40, N = 14, O = 16]

The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that

The volume of a gas is V cm³ at P mmHg. What is its new volume if the pressure is reduced to half at constant temperature?

Across a period from left to right, the general rise in first ionization energy is mainly due to

How many unpaired electrons are present in a nitrogen atom’s sublevels?

The stability of the noble gases is due to the fact that they

The maximum number of electrons in the L shell of an atom is

Elements in the same period of the periodic table have the same

²₁D + ³₁T → ⁴₂He + ¹₀n + energy. The reaction illustrates

A noble gas with high fog-penetrating power used in aerodrome beacons is

Permanent hardness of water can be removed by

Substances used as drying agents are usually

Calculate the solubility (mol dm⁻³) of 40 g of CuSO₄ dissolved in 100 g of water at 120 °C. [Cu = 64, S = 32, O = 16]

Coffee stains can best be removed by

Carbon (II) oxide is considered dangerous if inhaled mainly because itcan cause injury to the nervous system

The acid that is used to remove rust is

Calculate the volume of 0.5 mol dm^-3 H₂SO₄ that is neutralized by 25 cm³ of 0.1 mol dm^-3 NaOH 

The colour of methyl orange in alkaline medium is

Which of the following salts is slightly soluble in water?

6AgNO_4(aq) + PH_3(g) + 3H₂O_(l) → 6Ag_(s) + H₃PO_3(g) + 6HNO_3(aq) In the above reaction, the reducing agent is 

The IUPAC nomenclature of the compound LiAlH4 is

Iron can be protected from corrosion by coating the surface with

What quantity of aluminium is deposited when a current of 10A is passed through a solution of an aluminium salt for 1930s?

[Al = 27, F = 96500 C mol-1]

In which of the following is the entropy change positive?

If a reaction is exothermic and there is a great disorder, it means that

In the preparation of oxygen by heating KClO3 in the presence of MnO2, only moderate heat is needed because the catalyst acts by

The graph above demonstrate the effect of

2H_2(g) + O_2(g) ⇋ 2H₂O_(g) ΔH = - ve. What happens to the equilibrium constant of the reaction above if the temperature is increased?

To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of

In the diagram above, the gas produced is

Which of the following is used in rocket fuels?

A constituent common to bronze and solder is

When iron is exposed to moist air, it gradually rusts. This is due to the formation of

A compound gives an orangered colour to non-luminous flame. This compound is likely to contain

Stainless steel is used for making 

The residual solids from the fractional distillation of petroleum are used as

The IUPAC nomenclature of the compound above is 

Which of the following is used as fuel in miners' lamp?

Which of the following organic compounds is very soluble in water?

Benzene reacts with hydrogen in the presence of nickel catalyst at 180⁰C to give

Which of the following is used to hasten the ripening of fruit?

The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and

The correct order of increasing boiling points of the following compounds C₃H₇OH, C₇H₁₆ and C₄H₁₀ is

One of the major uses of alkane is

The haloalkanes used in drycleaning industries are

Two hydrocarbons X and Y were treated with bromine water. X decolorized the solution and Y did not not. Which class of compound does Y belong? 

The compound that is used as an anaesthetic is