What is the formula of a compound formed when an element Y with atomic number 13 combines with another element Z with atomic number 8?

What mass in grams of copper would be deposited in a copper voltammeter if 5,000 C of electricity was passed? [Cu = 63.5, IF = 96500C]

The final product of the reaction between C₂H₅OH and concentrated H₂SO₄ at 170⁰C is

How many moles are present in 80g of CaCO₃? [Ca = 40, C = 12, O = 16]

240dm³ of air at s.t.p is compressed to 17 atmosphere in a compression tube. Determine the volume in dm³ occupied in the tube.

During the extraction of sodium using Downs cell, the anode is a/an

The following are sourced from petroleum industry except

The chemical formula of magnetite is

Water collected from rivers and ponds contain oxygen, carbon(IV) oxide and

Which of the following compounds does not give oxygen gas on heating?

What is the relative molecular mass of Na₂CO₃ .10H₂O? [Na = 23, C = 12, O = 16, H = 1]

The following trioxocarbonate(IV) compounds are not affected by heat except

Sodium hydroxide solution was added to a solution of unknown salt X in a test tube, a blue precipitate was observed. The cation in the unknown salt X is

What is the relative molecular mass of calcium hydroxide? [Ca = 40, O = 16, H = 1]

The brown ring test is for identification of

The chemical process that uses steam, coke and water for the production of hydrogen is known as

The measure of the average kinetic energy of molecules of a gas is

The oxidation number of oxygen in hydrogen peroxide is

Alkaline hydrolysis of fats and oils produces soap and