FUNAAB Chemistry 2015/2016 Past Questions

₂⁴He + ₇¹⁴N --> ₁¹H + ₈¹⁷O. /n The nuclear above represents

The law obeyed when one volume of hydrogen reacts with one volume of chlorine to form two volumes of hydrogen chloride is

Exhaust fumes from a smoky vehicle gradually disappear as a result of

What is the shape of a molecule of CCL₄?

A mixture of proteins can be best separated by

The bonding between two elements where the shared pair of electrons are contributed by one of the elements is known as

Which of the following electron configurations belong to a noble gas?

What is the concentration of hydrochloric acid solution that contains 3.65g of HCL per 0.250dm³ of the solution? [H = 1,CL = 35.5]

The collisions of the gas molecules are said to be perfectly elastic because

Pure water can be obtained from sea water by

If both the pressure and volume of a given mass of gas initially at 0°C are doubled, what is the final temperature?

CH₄(g) +2O₂(g) ---> 2H₂O(g) + CO₂(g). From the equation above , the volume of carbon (IV) oxide formed by burning 25cm³ of methane completely is

Permanently hard water is softened by the addition of

When 100cm³ of a standard of KCLO₃ in water at 40°C is evaporated, 14g of the salt is recovered. The solubility of KCLO₃ in water at 40°C is

The water supply of a town is purified by

The boiling points of nitrogen, oxygen and carbon (IV) oxide are -196°C, -183°C and -65°C respectively. In fractional distillation of liquid air, which of the following will distill out first?

The extent of pollution in a river water can be measured by the level of

At a certain time, 1.2mg of a radioactive substance is present. After 6 hours, there is only 0.3mg remaining. The half-life of the element is

In the electrolytic purification of impure copper, the electrolyte used is a soluble salt of

In the acid based titration, the colour of methyl orange indicator at the equivalence point is

Rusting of iron is considered an electrochemical process with iron acting as the

The solvent used for removing stains from a cotton fabric is