A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm^3 of CO2 and 54g of water. The hydrocarbon should be

• A) C6H6
• B) C4H10
• C) C5H10
• D) C4H6

The label on a reagent bottle containing a clear organic liquid dropped off.The liquid was neutral to litmus and gave a colourless gas with metallic sodium. The liquid must be an?

• A. alkanoate
• B. alkaene
• C. alkanol
• D. alkane

What volume of hydrogen would be left over when 300cm³ of oxygen and 1000cm³ of hydrogen are exploded in a sealed tube? [2H₂(g) + O₂(g) → 2H₂Og]

• A. 200 cm³
• B. 400 cm³
• C. 600cm³
• D. 700cm³

A metal that can be extracted from cassitertite is

• A. cacium
• B. magnesium
• C. tin
• D. copper

(a)(i) Give the two reasons why soda lime is used instead of caustic soda in the preparation of methane.

(ii) List two physical properties of methane.

(iii) A hydrocarbon with a vapour density of 29 contains 82.76% carbon and 17.24% hydrogen. Determine the: I. empirical formula; II. molecular formula of the hydrocarbon. [ H = 1.00 C = 12.00 ]

(b)(i) What is meant by the term isomerism?

(ii) Draw the structures of the two isomers of the compound with the molecular formula C\(_2\)H\(_6\)O.

(iii) Give the name of each of the isomers in (b)(ii).

(iv) State the major difference between the isomers.

(c) Give three deductions that could be made from the qualitative and quantitative analysis of a given organic compound.

(d) Give one chemical test to distinguish between propene and propane.

(a) State the phenomenon illustrated by the:

(i) spreading of the smell of hydrogen sulphide gas in the laboratory;

(ii) existence of atoms of the same element having different mass numbers

(b) The atomic number of an element is 17. It has different atoms containing 18 neutrons and 20 neutrons, with a relative abundance of 75% and 25% respectively. Calculate the relative atomic mass of the element.

Which of the following apparatuses can be used to measure accurately a specific volume of a liquid?

• A. Beaker
• B. Conical flask
• C. Measuring cylinder
• D. Pipette

Which of the following substances is a mixture?

• A. Sulphur powder
• B. Bronze
• C. Distilled water
• D. Ethanol

A compound that gives a brick-red colour to a non-luminous flame is likely to contain

• A) copper ions
• B) sodium ions
• C) calcium ions
• D) aluminium ions

During a compression process involving an ideal gas at pressure P\(_1\), when the volume, V\(_1\) of the gas was halved, the temperature in Kelvin increases by half its initial value. The final pressure P\(_2\) is given by

• A)
  3P\(_1\)
• B)
  12P\(_1\)
• C)
  6P\(_1\)
• D)
  1.5P\(_1\)