- What process is involved in the reaction represented by the following equation?
AlCl3 + 3H2O Al(OH)3 + 3HCl
(a) dehydration (b) hydrolysis (c) double decomposition (d) neutralization
- Consider the reaction represented by the equation below:
xNH3 + yCl2 zHCl + N2
The values of x, y and z are respectively
(a) 2, 4, 6 (b) 3, 2, 4 (c) 2, 3, 6 (d) 3, 2, 6
- Hardness in water can be removed by adding
(a) copper (II) tetraoxosulphate (VI) (b) sodium trioxocarbonate (IV) (c) sodium chloride (d) alum
- X and Y form a salt in which X is a trivalent cation and Y is a bivalent anion. Which of the following equations represents the dissociation of the salt?
(a) XY X3+ + Y2-
(b) X3Y2 3X+ + Y2-
(c) X2Y3 2X3+ + 3Y2-
(d) X2Y2 2X3+ + 2Y2-
- N is formed form NH3 and H+ by
(a) covalent bonding (b) dative bonding (c) hydrogen bonding (d) ionic bonding
- The purity of a solid sample can best be determined by its:
(a) boiling point (b) melting point (c) conductivity (d) solubility
- The separation of petroleum fraction depends on the difference in their
(a) melting point (b) molar masses (c) solubilities (d) boiling points
- Which of the following bond types is responsible for the high boiling point of water?
(a) metallic bond (b) covalent bond (c) ionic bond (d) hydrogen bond
- Which of the following elements is diatomic?
(a) sodium (b) oxygen (c) iron (d) neon