SS1 REVISION

Which of the following forms an anion by accepting an electron?

• Chlorine

• Hydrogen

• Magnesium

• Potassium

Calculate the relative molecular mass of sodium hydrogen tetraoxosulphate(VI). [Na = 23, H = 1, S = 32, O = 16]

• 130

• 120

• 66

• 64

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

• density

• mass

• pressure

• temperature

A salt which loses its water of crystallization on exposure to the atmosphere is

• anhydrous

• deliquescent

• effervescent

• efflorescent

The application of heat to a gas in a closed container of fixed volume causes increase in pressure because the

• average speed of the molecules is reduced

• Distance between its molecules increases

• frequency of collision of the molecules with wall of the container increases

• number of the gas molecules increases

The oxidation number of oxygen in hydrogen peroxide is

• -3

• -2

• -1

• +1

A base that is soluble in water is referred to as

• acid

• alkali

• hydride

• salt

The components of universal indicator can be separated by

• chromatography

• crystallization

• filtration

• sublimation

Acid-base titration can be used to determine the following except the

• concentration of an acid

• concentration of an alkali

• mass number of an element

• percentage purity of an acid

2Pb(NO₃)₂ → 2PbO + zNO₂ + O₂ What is the value of z in the equation above?

• 1

• 2

• 3

• 4