UI Chemistry 2019/2020 Past Questions

2CH₃COOH + Zn —> ? The product of this reaction is:

A ketone reacts with hydroxylamine to give

Alkanoic acids are weak acids and ionises in solution to give:

An excess of ethanol heated with concentrated H2SO4 at a temperature of 180°C is dehydrated to give mostly:

Butene can be distinguished from benzene by reaction with:

In the chemical reaction of A + B = C + D, more of D is formed

In what way is equilibrium constant for the forward reaction related to that of the reverse reaction?

In which reaction will the point of equilibrium shift to the left when the pressure on the system is increased?

The furring of kettles is caused by the presence in water of .............

Which is a property of a reaction that has reached equilibrium?

0.16g of methane when burnt increases the temperature of 100g of water by 40°C, what is the heat of combustion of methane if the heat capacity of water is 4.2 Jg^-1 °C^-1? (CH4=16).

A charged car battery has energy that can be converted into another energy called energy

Copper oxide is heated with charcoal to produce carbon monoxide and copper. The reaction is an example of

For each oxygen atom in hydrogen peroxide which acts as an oxidant, there is an oxygen atom which acts as / a

Given the change of phase: CO2(g) changes to CO2(s), the entropy of the system

A pure solid usually melts .........

A small quantity of solid ammonium chloride was heated gently in a test tube; the solid gradually disappeared to produce a mixture of two gases. Later a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone ............

CH₄ has this geometry:

Chlorine, consisting of two isotopes of mass numbers 35 and 37, has an atomic mass of 35.5. The relative abundance of the isotope of mass number 37 is

Elements P, Q, R, S, have 6, 11, 15 and 17 electrons respectively, therefore

Which of the following is the pH of a strong alkali?

In an electrolytic cell the electrode at which the electrons enter the solution is called the ......; The chemical change that occurs at the electrode is call -----

the ionic radii of metals are usually

The energy required to remove the most bound electron in a gaseous atom is

A substance is said to be pure if