Chemistry

The tendency of an element to form chains of identical atoms
The property by which certain hydrated salts, when left exposed to atmosphere
The process by which sulphide ore is concentrated
Reaction of sodium hydroxide solution with iron (III) chloride solution
Action of heat on aluminum hydroxide
Reaction of zinc with potassium hydroxide solution
Action of dilute hydrochloric acid on magnesium sulphite
Give the IUPAC name for each of the following
Write the structural formula of the two isomers of butane
Lead nitrate solution is treated with sodium hydroxide solution drop wise till it is in excess
At the anode, when molten lead bromide is electrolyzed using graphite electrodes
Lead nitrate solution is mixed with dilute hydrochloric acid and heated
Anhydrous calcium chloride is exposed to air for some time
Barium chloride solution is slowly added to sodium sulphate solution
Ionic compounds have a high melting point
Inert gases do not form ions
Ionisation potential increases across a period, from left to right
Alkali metals are good reducing agents
Conductivity of dilute hydrochloric acid is greater than that of acetic acid
Name the gas that is produced in - Sulphur is oxidized by concentrated nitric acid
Name the gas that is produced in - Action of dilute hydrochloric acid on sodium sulphide
Name the gas that is produced in - Action of cold and dilute nitric acid on copper
Name the gas that is produced in - At the anode during the electrolysis of acidified water
Name the gas that is produced in - Reaction of ethanol and sodium
Ionic or electrovalent compounds do not conduct electricity in their ___ state. (fused / solid)
Electrolysis of aqueous sodium chloride solution will form ___ at the cathode. (hydrogen gas / sodium metal)
Dry hydrogen chloride gas can be collected by ___ displacement of air. (downward / upward)
The most common ore of iron is _____ . (calamine / haematite)
The salt prepared by the method of direct combination is ____ . (iron (II) chloride / iron (III) chloride
What do you understand by a lone pair of electrons
In Period 3 of the Periodic Table, element B is placed to the left of element A
Copy and complete the following table which refers to the conversion of ions to neutral particles
Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali
State why concentrated sulphuric acid is not used for drying ammonia gas
Why is ammonia gas not collected over water
Name the acid used for the preparation of hydrogen chloride gas in the laboratory
Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas
For the preparation of hydrochloric acid in the laboratory
For the electro-refining of copper
The percentage composition of a gas is
Aluminum carbide reacts with water according to the following equation
If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 cc of B