Chemistry

How many faradays of electricity are required to liberate 9g aluminium? (AI = 27)

A. 0.1 B. 0.3 C. 1.0 D. 2.7 E. 3.0 Correct Answer: Option C - 1.0

5 years ago

Glucose can be obtained from starch by?

A. hydrogenation B. dissociation C. hydrolysis D. dialysis E. dehydration Correct Answer: Option C - hydrolysis

5 years ago

If the volume of a given mass of gas at 0°C is 27.3cm³. What will be the volume of the gas at 10°C assuming the pressure remaining constant?

A. 2.73cm³ B. 28.3cm³ C. 37.3cm³ D. 273cm³ E. 283cm³ Correct Answer: Option B - 28.3cm³

5 years ago

Which of the following occurs when an aqueous solution of sodium hydroxide is electrolyzed using graphite electrodes?

A. Sodium metal is produced at the anode B. Sodium amalgam is formed at the cathode C. Oxygen gas is…

5 years ago

When naphthalene on heating changes from the solid state directly to the gaseous state it undergoes?

A. evaporation B. sublimation C. decomposition D. combustion E. ionization Correct Answer: Option B - sublimation

5 years ago

Calcium is usually extracted by the electrolysis of its?

A. trioxonitrate (V) B. tetraoxosulphate (IV) C. oxide D. hydride E. chloride Correct Answer: Option E - chloride

5 years ago

Polyatomicity is illustrated by molecules of?

A. sulphur B. carbon (IV) oxide C. noble gases D. liquefied oxygen E. liquefied nitrogen Correct Answer: Option A -…

5 years ago

The following will decolourize acidified potassium tetraoxomanganate (VII) solution except?

A. sulphur (lV) oxide B. but-3-ene C. pentane D. hydrogen sulphide E. propyne Correct Answer: Option C - pentane

5 years ago

Tetraoxosulphate (lV) acid is described as strong acid because it is highly?

A. corrosive B. concentrated C. reactive D. soluble in water E. ionized in water Correct Answer: Option E - ionized…

5 years ago

Which of the following would increase the rate of reaction of chips of a metal M as shown in the equation below? M(s) + 2HCI(aq) → MCI2(aq) + H2(g)

A. Diluting the hydrochloric acid B. Adding some distilled water C. Decreasing the temperature D. Grinding the metal into powder…

5 years ago