In the electrolytic extraction of aluminum, the function of the molten cryolite is to

• A) precipitate aluminium hdroxide
• B) lower the melting point of aluminium oxide
• C) act as a raw materials
• D) act as a solvent

Monosaccharides are

• A) hydrolysable
• B) non-hydrolysable
• C) not soluble in water
• D) sweet but sometimes non sugary

If the volume of a given mass of a gas at 0ºc is 29.5cm³ . What will be the volume of the gas at 15ºc, given that the pressure remains constant.

• A. 31.6
• B. 62.2
• C. 32.7
• D. 31.1

Neutrons were discovered by?

• A. James Chadwick
• B. Ernest Rutherford
• C. J.J Thompson
• D. John Dalton

A solid begins to melt when?

• A. constituent particles acquires a greater kinetic energy
• B. energy of vibration of particles of the solid is less than the intermolecular forces
• C. constituent particles acquires energy above the average kinetic energy
• D. energy of vibration of particles of the solid equals the intermolecular forces

The IUPAC nomenclature of the compound LiAlH₄ is

• A) lithiumtetrahydridoaluminate (III)
• B) aluminium tetrahydrido lithium
• C) tetrahydrido lithium aluminate (III)
• D) lithium aluminium hydride

Which of the following is used extensively in manufacturing photographic chemicals?

• A. Aluminium chloride
• B. Zinc chloride
• C. Silver chloride
• D. Mercury (ll) chloride

In the periodic table, the electrical and thermal conductivities are properties of elements that

• A) decrease across the period and increase down the group
• B) increase across the period and decrease down the group
• C) decrease across the period and down the group`
• D) increase acrosss the period and down the group

Reduction of alkanonoes with LialH4 produces

• A. primary alkanols
• B. secondary alkanols
• C. tertiary alkanols
• D. polyhydric alkanols

which of the following will decrease in mass when heated in air?

• A. Magnesium ribbon
• B. powdered sulphur
• C. Calcium trioxocarbonate(IV)
• D. magnesium teteraoxosulphate(VI)