An organic compound which reacts readily with bromine to form a compound with the formula CH₃CHBrCH₂Br is

• A. ethene
• B. propane
• C. butane
• D. propene

A balanced chemical equation is based on the law of?

• A. Periodicity
• B. Constant composition
• C. Multiple proportion
• D. Conservation of mass

Give the total mass of copper in 1gm of copper (II) sulphate [Cu = 40; S = 32; O = 16]

• A) 0.25g
• B) 0.50g
• C) 10g
• D) 2.5g

If humid air is polluted by chlorine discharged, the air can be restored by sprinkling

• A. solid MnO₂
• B. acidified KMnO₄
• C. acidified FeSO₄
• D. saturated NaCl_(aq)

The properties of electrovalent compounds include the following except

• A) High melting point and boiling point
• B) Conduction of electricity in the molten state
• C) High volatility at room temperature
• D) Ionization in aqueous solution

Which of the following statements best explains the difference between a gas and a vapour?

• A. Unlike gases, vapours are liquids at room temperature
• B. Unlike gases, vapour can easily be condensed into liquids
• C. Unlike gases, vapour is readily converted into solids
• D. Vapours are generally denser than gases

The boiling of fat and aqueous caustic soda is referred to as

• A. hydrolysis
• B. esterification
• C. acidification
• D. saponification

The product of the electrolysis of dilute sodium hydroxide using platinum electrodes are

• A. Hydrogen and oxygen gases
• B. Water and hydrogen gas
• C. Water and sodium metal
• D. Sodium metal and oxygen gas

The oxidation state of Cr in K2Cr2O7 is

• A) +7
• B) +6
• C) +5
• D) 4

The functional groups present in the compound above are

• A) alkene and halo-group
• B) hydroxyl and chloro-group
• C) alkene and chloro-group
• D) hydroxyl and halo-group