Palm wine turns sour with time because?

• A. the sugar content is converted into alcohol
• B. the carbon (IV) oxide formed during the fermentation process has a sour taste
• C. it is commonly adulterated by the tappers and sellers
• D. microbial activity results in the production of orgain acids within it

When air is successively passed through sodium hydroxide solution, alkaline pyrogallol and then concentrated tetraoxosulphate (VI) acid, its remaining components are

• A. oxygen and water vapour
• B. oxygen and nitrogen
• C. carbon (IV) acid and noble gases
• D. nitrogen and noble gases

If the third member of a homologous series is C3H8, the fifth member will be

• A. C₅H₈
• B. C₅H₉
• C. C₅H₁₀
• D. C₅H₁₂

The products of the combustion of candle wax are?

• A. hydrogen and water
• B. oxygen and water
• C. carbon (IV) oxide and water
• D. carbon (II) oxide and water

Calculate the oxidation number of Mn in MnO₂ .

• A) 6
• B) 4
• C) 2
• D) 8

The heat required to raise the temperature of the body by 1k is called?

• A. Specific heat
• B. Thermal capacity
• C. Water equivalent
• D. None of the above

B. Distfrom the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite illation

• A. l and ll only
• B. l and lll only
• C. l, ll and lll only
• D. l, ll, lll and lV

By what amount must the temperature of 200cm^3 of Nitrogen at 27°C be increased to double the pressure if the final volume is 150cm^3 (Assume ideality)

• A) 150°C
• B) 177°C
• C) 75°C
• D) 120°C

An ion has a charge of +3. The nucleus of the ion has a mass of 120. The number of neutrons in the nucleus is 1.50 times that of the number of protons. How many electrons are in the ion?

• A) 55
• B) 48
• C) 45
• D) 42

If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litres of water and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be

• A) 2.2M
• B) 1.1M
• C) 0.22M
• D) 0.11M