The following are heavy chemicals except

• A. tetraoxosulphate (VI) acid.
• B. caustic soda
• C. Dyes
• D. sodium trioxocarbonate 5

On evaporation to dryness, 350cm³ of saturated solution of salt Z gave 55.5g of salt. What is the solubility of the salt? [Z = 101]

• A. 1.57 moldm^-3
• B. 3.14 moldm^-3
• C. 6.28 moldm^-3
• D. 12.56 moldm^-3

Catalytic hydrogenation of oils results in the production of

• A. soaps
• B. detergents
• C. alkanes
• D. margarine

Which of the following salts will turn blue litmus red?

• A) Sodium tetrahydroxozincate (ll)
• B) Potassium hydrogentetraoxosulphate (lV)
• C) Sodium trioxocarbonate (lV)
• D) Zinc chloride hydroxide

A chemical process in which there is a gain of electrons is known as?

• A. Sublimation
• B. Reduction
• C. Oxidation
• D. Distillation

2SO₂(g) + O₂(g) 2SO₃. In the reaction above, the standard heats of formation of SO₂(g) and SO₃(g) are -297 KJ mol-1 respectively. The heat change of the reaction is?

• A. -99 kJ mol-
• B. -198 kJ mol-
• C. +198 kJ mol-
• D. +683kJ mol-

An amphoteric compound _____________

• A) Reacts with alcohols
• B) Reacts both as an acid and as a base
• C) It is solid at room temperature
• D) has a PH of 7

If an element R belongs to the same group as sodium, an aqueous solution of ROH will

• A. be neutral
• B. be acidic
• C. be coloured
• D. have pH greater than 7

The atomic number of an atom would be equal to its mass number if it

• A. has a totally filled valence shell
• B. has a high charge to mass ratio
• C. does not contain neutrons
• D. exhibits isotopy

2 - methyl propan -2- ol is an example of

• A) primary alkanol
• B) secondary alkanol
• C) tertiary alkanol
• D) quartenary alkanol