Chemistry Past Questions and Answers

The IUPAC name for the compound \(ClCH_{2}CH_{2}OH\) is

The real harmful effect of the release of chlorofluorocarbons into the atmosphere is that it eventually causes

A primary alkanol has a molecular mass of 60. What is the structural formula of the compound? [C= 12.0, H= 1.0, O= 16.0)

Petroleum is a non-renewable source of energy because it

(a)(i) What is an acid-base indicator?
(ii) Give one example of an acid-base indicator.

(b) State the property exhibited by nitrogen(IV) oxide in each of the following equations:,
(i) 4Cu + 2NO\(_2\) -> 4CuO + N\(_2\) (ii) H\(_2\)O + 2NO\(_2\) --> HNO\(_3\) + HNO\(_2\)

(c)(i) Define enthalpy of combustion..
(ii) State why the enthalpy of combustion is always negative.

(d)(i) Distinguish between a primary cell and a secondary cell.
(ii) Give an example of each of the cells stated in I (d)(i).
(e) Define the term mole.
(f) Calculate the amount of hydrochloric acid in 40.0 cm\(^3\) of 0.40 moldm\(^{-3}\) dilute HCl.
(g) Name two substances which can be used as electrodes during the electroylsis of acidified water.
(h) List two forces of attraction that can exist between covalent molecules.
(i) Name the products formed when butane undergoes incomplete combustion.
(j) Write the electron configuration of \(_{26}\)Fe\(^{3+}\)