1The electronic configuration of an element X is 1s 2 2s 2 2s 6 3p 2 3p 4 . It can be deduced that X
2What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?
3Which of the following sets of elements are arranged in order of decreasing atomic size in the Periodic Table?
4Which of the following changes is characteristic of an alpha-particle emission?
5An element X has an atomic number of 16. What is its most likely oxidation state in its binary compounds?
6An element which can exist in two or more forms in the same physical state, exhibits
7Which of the following can be used to predict the type of bonding in HCI?
8Which of the following molecules has a linear structure?
9The volume occupied by a given mass of gas depends on its
10In which of the following reactions is the position of equilibrium not affected by an increase in pressure?
11The activation energy of a reaction can be altered by
12Which of the following factors does not affect the rate of reaction of CaCO 3 with HCI?
13When X is heated with manganese (IV) oxide, oxygen is produced X is
14Which of the following statements is not a postulate of the kinetic theory of gases?
15HNO3 does not usually react with metals to liberate hydrogen because HNO3 is
16Which of the following is not an acid anhydride?
17NaHCO 3(s) can be distinguished from Na 2 CO 3(s) by the action of
18What process is involved in the reaction represented by the following equation? AICI 3 + 3H 2 O (l) → AI(OH) 3(s) + 3HCI (g)
19A salt that absorbs moisture from the atmosphere without forming a solution is said to be
20Consider the reaction represented by the equation below, xNH 3(g) + yCI 2(g) → zHCI (g) + N 2(g) The values of x,y and z are respectively
21Which of the following compounds dissolves readily in water?
22When ice is changing to water, its temperature remains the same because the heart gained is
23Which of the following methods is suitable for preparing insoluble salts?
24Which of the following reactions is sulphur (IV) oxidizing agent?
25Which of the elements will burn in excess oxygen to form a product that is neutral to litmus?
26The main difference between a primary cell and a secondary cell is that the primary cell
27Determine the mass of copper deposited by 4.0 moles of electrons in the reaction represented by the equation below: Cu 2 (aq) + 2e - → Cu (s)
28Reaction undergone by compounds with the general formula C n H 2n+2 include
29What is the major product formed when C 2 H 5 OH reacts with CH 3 COOH?
30Which of the following substances is a non-reducing sugar?
31The colour of the solution formed when ethyne reacts with an acidic solution of potassium tetraoxomanganate (VII) is
33Ethyne undergoes the following reactions except
34Hardness in water can be removed by adding
35Which of the following pairs of solutions will produce a precipitate when mixed?
36Which of the following substance is an alloy of lead?
37In which of the following processes is biotechnology not applied?
