FUNAAB Chemistry 2020/2021 Past Questions

The minimum amount of energy required for a reaction to take place is

Reduction is the process of

The raw material used for the smelting of iron ore in a furnace is

The sulphide which is insoluble in dilute hydrochloric acid is

Which of the following typically represents a photochemical reaction?

What is the change in oxidation number of manganese in the reaction represented by the following equation?

Which of the following elements is a d-block element?

Which of the following factors would not affect the solubility of a gas?

Kerosine is commonly used to remove the red colour stain of palm oil from clothes because it

The most suitable metal that can be used as a lightning conductor is

The air around smelting industries is likely to contain

NH₄Cl_(s) → NH_3(g) + HCl
The reaction above can only attain equilibrium if

Water has the ability to dissolve almost all substances because its molecule has a structure with

The property used in the industrial preparation of nitrogen and oxygen from air is

An increase in entropy can best be illustrated by

On heating, which of the following compounds will decompose to the free metal, nitrogen (IV) oxide and oxygen

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

The products of the combustion of candle wax are

How much heat will be liberated if 10g of hydrogen burns in excess oxygen according to the following thermochemical equation?
H_2(g) + ¹⁄₂O_2(g) → H₂O_(l)
ΔH° = -286KJ

What type of bond exists between an element X with atomic number 12 and Y with atomic number 17?

Two 50cm³ cylinders I and II contain hydrogen and oxygen respectively at the same temperature and pressure. If there are 3.0 moles of oxygen, then the mass of hydrogen is

Hardness of water is usually due to the presence of

The product formed at the cathode during the electrolysis of sodium chloride solution with carbon electrodes is

In the electrolytic extraction of aluminium, the function of the molten cryolite is to

The relative mass of a naturally occuring lithium consisting of 90% ⁷₃Li and 10% ⁶₃Li is

The basicity of CH₃COOH is

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

Synthetic gas is a mixture of

Equal moles of ethyne and hydrogen iodine react to give

The major product formed by the reaction between ethanoic and aqueous sodium hydroxide is

The shape of the hydrocarbon compound CH is

A metal X forms two bromides with formulae XBr₂ and XBr₃. What type of bonding exists between X and bromide in the bromide?

Calculate the mass of 1.12dm³ of chlorine gas

What is the pH of a 0.001 moldm^-3 solution of sodium hydroxide?

20g of calcium trioxocarbonate (IV) is heated to constant mass and 11.2g of calcium oxide is left as residue. The mass of the gaseous product left is [Ca = 40, C = 112, O = 16]

The vapour pressure of water at 15°C is 13mmHg. At a barometric pressure of 747mmHg, 2dm³ of nitrogen gas is collected over water at 15°C. The pressure of nitrogen gas is

Ethanol reacts with concentrated tetraoxosulphate (VI) acid at a high temperature above 170° to form

Which of the following is a double salt?

Find the value of n in the following
XO^n-₃ + 4H⁺ + 3e^- → XO + 2H²

The IUPAC name of the compound H₃CCH(CH₃)CHCHCH₃, is

The colour of methyl orange in alkaline medium is

Which of the following molecules is not linear in shape?

Alkanals can be distinguished from alkanones by the reaction with

An emulsion may be produced by shaking a detergent solution with

Which of the following methods can be used to obtain pure water from a mixture of sand, water and methanoic acid?

A suitable solvent for iodine and naphthalene is

Which of the following reactions do alkenes undergo?

The alkanol obtained from the production of soap is

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

The type of isomerism shown by cis- and trans- isomers is