UNIPORT Chemistry 2011/2012 Past Questions

A compound contains 40% carbon, 6.& % Hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, find the molecular formula

Aluminium hydroxide is used in the dyeing industry as a

An element that occurs in the free state is

C_4(g) + H_2(g) → C₂H_6(g)ΔH = 13 The reaction represented above is

Calculate the mass of chlorine gas which occupies a volume of 1.12dm³ at S.T.P

Calculate the number of moles of HCL present in 20cm³ of a 0.75M solution of the acid.

Chlorine consisting of 2 isotopes of mass numbers 35 and 37 in the ratio 3:1 has an atomic mass 35.5 calculate the relative abundance of the isotope of number 3?

How long will it take to deposit 0.08g of copper from CuCl₂ solution by passing a current of 0.5A[Cu = 64, F = 96500C/mol]

How much faster does a Helium atom travel than a nitrogen molecule at the same temperature?

If a solution contains 4.9g of tetraoxosulphate(VI) acid, calculate the amount of copper(II)oxide that will react with it

MnO_2(g) + xHCl_(aq) → MnCl_2(g) + yH₂O_(i) + zCl_2(g) In the equation above, what are the values of x,y and z respectively?

Tartaric acid is used industrially to make

The carbon atoms in ethane are ........... hybridized

The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is

The oxidation state of oxygen in tetraoxosulphate(vi) acid is

The reaction that takes place in Daniel cell is

The salt formed from a strong acid and strong base is

The type of reaction that is peculiar to benzene is

Under normal condition of ionic addition, what will be the major product of the addition of HBr to 2-methyl-2-butene

What is the percentage by mass of oxygen in Al₂(SO₄)₄₃.2H₂O?

What volume of gas is evolved at s.t.p if 2g of calcium trioxocarbonate(IV) is added to a solution of hydrochloric acid?[Ca = 40, C = 12, O =16, Cl = 35.5, h = 1, molar volume of gas at s.t.p = 22.4dm³]

Which experiment led to the measurement of the charge on an electron?

Which of the following acts as both a reducing and an oxidizing agent

Which of the following is not a unit of temperature?